Tuesday, January 28, 2020

Inferences for One Population Standard Deviation Essay Example for Free

Inferences for One Population Standard Deviation Essay The Standard deviation is a measure of the variation (or spread) of a data set. For a variable x, the standard deviation of all possible observations for the entire population is called the population standard deviation or standard deviation of the variable x. It is denoted ÏÆ'x or, when no confusion will arise, simply ÏÆ'. Suppose that we want to obtain information about a population standard deviation. If the population is small, we can often determine ÏÆ' exactly by first taking a census and then computing ÏÆ' from the population data. However, if the population is large, which is usually the case, a census is generally not feasible, and we must use inferential methods to obtain the required information about ÏÆ'. In this section, we describe how to perform hypothesis tests and construct confidence intervals for the standard deviation of a normally distributed variable. Such inferences are based on a distribution called the chi-square distribution. Chi is a Greek letter whose lowercase form is χ. A variable has a chi-square distribution if its distribution has the shape of a special type of right-skewed curve, called a chi-square (χ2) curve. Actually, there are infinitely many chi-square distributions, and we identify the chi-square distribution (and χ2-curve) in question by its number of degrees of freedom. Basic Properties of χ2-Curves are: Property 1: The total area under a χ2-curve equals 1. Property 2: A χ2-curve starts at 0 on the horizontal axis and extends indefinitely to the right, approaching, but never touching, the horizontal axis as it does so. Property 3: A χ2-curve is right skewed. Property 4: As the number of degrees of freedom becomes larger, χ2- curves look increasingly like normal curves. Percentages (and probabilities) for a variable having a chi-square distribution are equal to areas under its associated χ2-curve. The one-standard-deviation χ2-test is also known as the χ2-test for one population standard deviation. This test is often formulated in terms of variance instead of standard deviation. Unlike the z-tests and t-tests for one and two population means, the one-standard deviation χ2-test is not robust to moderate violations of the normality assumption. In fact, it is so non robust that many statisticians advice against its use unless there is considerable evidence that the variable under consideration is normally distributed or very nearly so. The non-parametric procedures, which do not require normality, have been developed to perform inferences for a population standard deviation. If you have doubts about the normality of the variable under consideration, you can often use one of those procedures to perform a hypothesis test or find a confidence interval for a population standard deviation. The one-standard-deviation χ2-interval procedure is also known as the χ2-interval procedure for one population standard deviation. This confidence-interval procedure is often formulated in terms of variance instead of standard deviation. Reference: http://classof1.com/homework-help/statistics-homework-help View as multi-pages

Monday, January 20, 2020

Essay --

First, a bit of background on the inventor and his innovation. Thomas Davenport lived in Vermont in the 19th century as a blacksmith and shop owner. During the early 1830s, Davenport heard about an interesting invention, and travelled to see Joseph Henry’s electromagnet. The magnet was used in an ironworks to separate different types and purities of iron, but was considered inefficient and was more of an interesting contraption than a useful device. By studying the electromagnet, Davenport figured out how to build his own electromagnet. He also made a few changes and came up with something of his own design.â€Å"He mounted two electromagnets to a pivot, and two others on fixed poles. He than used a battery attached by a commutator (a switching device) to supply current to the system. When he threw the switch the device rotated and thus created the "first" electric motor.†(http://edisontechcenter.org/DavenportThomas.html) Davenport had created a battery-powered electric motor, powerful enough to operate some the of the equipment he used in his blacksmith shop. He also believed in the motor’s ability to power locomotives, and built a small electric circular track with electricity-conducting rails and a small battery in the center to power the model train that was on the track to demonstrate its ability. He found the motor had many applications as a power source. He used his electric motor to power a printing press (which he then used to publish a journal about electromagnetism), a small electric car that was one of the first of its kind, and an electric powered piano. Davenport’s motor was unable to be profitable, however. â€Å"No one knew how to predict the amount of energy in chemical batteries, and a battery-powered motor could not compe... ... What they had previously were horses, which were inefficient and time-consuming in comparison. Streetcars were a valuable form of local transportation at the time and are used in some places even today. Davenport’s electric car could also be the prototype for modern electric cars today. The main difference is that his car was on a track. Until then, not many people had considered electricity’s use as a power source for vehicles. Thanks to Davenport’s invention, inventors and scientists could speculate on it’s use and efficiency as a motor for transportation that could be available to the public. The most difficult part of such a task would be how to power the vehicle. The advances and new technology after Davenport were able to take advantage of his motor and the knowledge it gave them, and people were able to create a power source that was practical and efficient.

Sunday, January 12, 2020

Irish Family Law Essay

Discuss some of the key provisions and principles of the United Nations Convention on the Rights of the child. Include an example of Irish law or police that complies /does not comply with the States obligations under the convention. Introduction This essay will look at some of the key provisions of the United Nations Convention on the Rights of the Child (UNCRC) and discuss Ireland’s progress in fulfilling their obligation under the UNCRC. The author will reflect briefly on the history of children’s rights in Ireland. The essay will consider what measures the state has taken to develop strategies and policies to improve the wellbeing of the children. Recent government initiatives will be explored will be explored to assess whether the UN Convention has been implemented into National Policy. The author will also consider the legal framework to gauge if Irish legislation as it stands today complies with the states obligations under the convention. Historical Perspective Attitudes towards children and their rights have changed dramatically in recent years; these changes have been slow to come about. Historically children were deemed the property of their parents and had no rights. In the late 1800’s, events abroad began to have an impact on attitudes if Ireland. The 1908 children’s act Britain and Ireland remained the main piece of legislation safeguarding children’s rights for almost one hundred years until the Irish Child Care Act 1991. The United Nations was set up in 1945 after the Second World War to promote peace and human rights. In 1989, it was decided that children needed a separate set of rights to ensure that children worldwide were nurtured, protected and allowed to enjoy childhood. In 1990, Ireland signed the United Nations Convention on the Rights of the Child and ratified it in September 1992 thereby committing the state to implementing the UNCRC. The UNCRC is based on four core principles, the best interest of the child, the right to life survival and development, respect for the views of the child and non-discrimination. Article 3.1 of UNCRC states ‘In all actions concerning children, whether undertaken by public or private social welfare institutions, courts of law, administrative authorities or legislative bodies the best interest of the child shall be a primary consideration’. Legislation The Child Care Act 1991 is the legislative framework in Ireland for promoting the welfare of the child. This legislation deals primarily with the protection of children in emergencies, or in care. The Childcare Act 1991 Part II, places a statutory onus the HSE to promote the welfare of children in need of care and protection. The 1991 Act also gave the HSE more power to provide childcare and family support services and while doing so must have regard to the following: ‘It is generally in the best interest of the child to be brought up in his or her own family. Having regard to the rights and duties of the parents, the welfare of the child is the first and paramount consideration and that as far as is practicable, the wishes of the child should be considered† (Childcare Act 1991). Part II of The childcare act implements the principle of the best interest of the child in law. The wording in part II of the childcare act would also appear to comply with Article 5 of the UNCRC requiring that ‘Governments respect the right of parents of provide for and care for their children’. Under the Irish Constitution, which is the fundamental law of the land, the family is based on the institution of marriage; only married parents have automatic rights to guardianship of their children. The rights of unmarried parents, in particular fathers are not considered under Irish law, consequently the rights of their children are being contravened. This is in contradiction with Article 18 of the UNCRC, which requires ‘State parties to recognise that both parties have equal responsibility for the care and development of their children. Article 7.1 states that the child †¦has the right to know and be cared for by his or her parents†, while Article 9 requires â€Å"state parties to ensure that a child will not be separated from his parents against the ir will†¦Ã¢â‚¬  UNCRC (1989). Irish law makes it impossible for many children to realise these rights. In the case of unmarried parents, only the mother has automatic right to guardianship. The father must have the consent of the mother or pursue his rights to guardianship through the courts. Article 41 and 42 of the Constitution provides protection for the family unit based on marriage; it does not give individual rights and is more about protecting the institution of marriage than the family. The children of unmarried parents are not afforded the same protection under Article 41 and 42. Under the Irish Constitution as it currently stands, Ireland is not compliant with the UN convention. The constitution, in many cases, denies children of unmarried parents the right to be cared for by both parents. Article 3 .3 of the UN Convention calls for all ‘services and facilities responsible for the care and protection of children to conform to the standards established by competent authorities’. UNCRC (1989) . In 2006 The Child Care (Pre-School Services) Regulations 1996 were revised and replaced by the Child Care (pre-school Services) (No 2) Regulations. The 2006 regulations are more child centred and focus on the health, welfare and development of the child. These regulations are the regulatory framework within which all-early years services must operate in Ireland. Through a vigorous system of inspection, compliance with the pre-school regulations is monitored by the HSE to ensure that all Early Years services meet the minimum standards required by law. The Child Care (Pre School Services) Regulations implement the UN Convention in Irish Law. National Policy Since Ireland ratified the UN Convention in 1992 there have been numerous changes in policy, showing the Irish Government’s commitment to implementing the UNCRC. In 1999, Children First National Guidelines for the Protection and Welfare of children was published by the Department of Health and Children. These guidelines highlight the importance of child welfare and are intended to provide a framework for all those who care for and work with children. Children First is based on the key principle that the best interest s of the child is paramount. These guidelines implement the best interest of the child and Article 19 of the UN Convention into National Policy. In 2006, the Committee on The Rights of The Child (CRC) recommended that Ireland review the Children First guidelines and consider putting them on a statutory basis CRC (2006). The guidelines were revised in 2011 to include new policy, legislation and organisation. at the time of the launch of the new guidelines in 2011, the government announced its intention to put the Children First Guidelines on statutory footing, it will then a legal requirement to report concerns regarding a threat a child’s welfare Nuig (2012). In 1997, the Irish Government made a commitment that a National Childcare Strategy would be developed and an expert working group on Childcare was charged with developing that strategy. Despite Ireland’s commitment to the UN Convention, prior to this there was no national policy on children. The National Children’s Strategy 2000-2010 set three National Goals: to listen to children, think more about what children need and act for children in a holistic sense National Children’s Strategy Our Children-Their Lives (2000). Finally, Ireland was moving towards implementing the UN Convention into National Policy. For the first time children were asked about what they thought they needed and what they would like see happen for them in the future in Ireland. This fulfilled the states obligation under Article 12 of the UN Convention, which requires that ‘State Parties shall assure to the child who is capable of forming his or her own view the right to express those views freely in all matters affecting the child, the views of the child being given due weight in accordance with the age and maturity of the child’ UNCRC (1989). Two thousand five hundred children were involved in these consultations; their responses identified a need for more play and recreation opportunities National Children’s Strategy (2000). In response to these consultations and to honour the states commitment to the UN Convention Article 31 which requires state parties ‘to recognise the right of the child to rest and leisure, to engage in play and recreational activities appropriate to the age of the child’ the government launched Ready, Steady, Play! A National Play Policy in 2004. The objectives of the National Play Policy were to give children a voice, to raise awareness of the importance of play and to improve and maximise the quality and safety of play areas particularly in disadvantaged areas National Play Policy (2004-2008). In 2009 Sà ­olta, the National Quality Framework and Aistear the Early Childhood Curriculum Framework were rolled out. Sà ­olta looks at quality provision and underpins the child’s right to have a voice, recommending that ‘each child has opportunities to make choices, is enabled to make decisions and has his /her choices and decisions respected’ CECDE (1999). Aistear promotes partnerships with parents and play NCCA (2009). Together with Regulation 5 of the Child Care (Pre School Services) (No.2) Regulations 2006 Sà ­olta and Aistear use the Whole Child Perspective to ensure the holistic development of the child while implementing the UN Convention into practice on a daily basis. It is evident that the Irish State is committed to implementing the UN Convention into Irish Law. The legislation introduced in recent years goes some way towards implementing children’s rights into law. In this authors opinion the main obstruction to Ireland’s compliance under the convention is the Irish constitution in its present form. All legislation is subject to the Constitution; therefore, any legislation introduced around child protection or welfare must be compatible with the Constitution. In 2006, the Committee on the rights of the child recommended that Ireland ‘takes further action to incorporate the Convention into domestic law’ CRC (2006). It is this author’s opinion that changes will have to be made to the constitution to separate the rights of the child from those of the family. Many of the policies such as The National Childcare Strategy, The National Play Policy and Children First all underpin the right of the child as outlined in UN Convention. However these policies take the form of guidelines or frameworks, they are not part of the legislation. Following the recommendations of the CRC (2006), it is hoped that the Children First Guidelines will be put on a statutory footing ensuring mandatory reporting of child neglect and abuse. This would help safeguard future generations of Irish children from neglect and abuse. Reference List †¢Centre for Early Childhood Development and Education (2006) Sà ­olta The National framework for Quality in Early Childhood Care and Education. Dublin: Centre for Early Childhood Development and Education. †¢Child Care Act 1991 †¢Department of Children and Youth Affairs (2011) Children First: National Guidelines for the Protection and Welfare of Children, Government Publication: Dublin Available at: http://WWW.dcya.gov.ie/documents/child_welfare_protection/children First.pdf †¢Ireland, Government of (1937) Bunreacht Na hÉireann, Constitution of Ireland. Dublin: Stationery Office. †¢Ireland, Government of (2000) National children’s Strategy, Dublin: The Stationery Office. †¢Ireland, Government of (2006) Child Care Pre-School Services NO 2 Regulations 2006 and child Care Pre-School Services No 2 Amendment Regulations 2006. Dublin: The Stationary Office. †¢National Council for Curriculum and Assessment, (2004) Aistear the Early Childhood Curriculum Framework. Dublin: National Council for Curriculum and Assessment. †¢National Play Policy (2004) Ready Steady Play! [Online]. Available at: http/www.dcya.gov.ie/documents/publications (Accessed 20 January 2012). †¢Nui Galway (2011) Quality Awareness in Early Learning, Galway: Nui Galway. †¢Nui Galway (2012) The Child and Family in Irish Law, Galway: Nui Galway. †¢UN committee on the rights of the Child (CRC) (2006) UN Committee on the Rights of the Child: Concluding Observations, Ireland, 29 September 2006, [Online] Available at: http:www.childrensrights.ie/resourcse.un-com (Accessed: 14 January 2012. †¢United Nations (1989) Convention of the Rights of the Child [Online].Available at: http//wwwcirp.org/library/ethics/UN-Convention/(Accessed: 17 January 2011)

Saturday, January 4, 2020

Essay The Importance of Prenatal Care - 1658 Words

The Importance of Prenatal Care Prenatal care is widely accepted as an important element in improving pregnancy outcome. (Gorrie, McKinney, Murray, 1998). Prenatal care is defined as care of a pregnant woman during the time in the maternity cycle that begins with conception and ends with the onset of labor. A medical, surgical, gynecologic, obstretic, social and family history is taken (Mosbys Medical, Nursing, and Allied Health Dictionary, 1998). It is important for a pregnant woman as well as our society to know that everything that you do has an effect on your baby. Because so many women opt not to receive the benefits of prenatal care, our society sees the ramification, which include a variety of complications primarily†¦show more content†¦8oz. and were thus considered low birth weight births. Preterm births increased from 9.4% in 1984 to 11% in 1993(as cited in MCN, 1998). African Americans had low birth weights that more than doubled those of whites and very low birth weights were three times higher. Many of the low birth weight births resulted in death. According to the National Vital Statistics Report, the figures for the United States from 1998 are as follows: 82.8% of mothers received first trimester care 3.9% received late or no care 63.2% of teen mothers age 15-19 received first trimester care 8.8% of teen mothers received late or no care 12.6% was the median number of care visits Literature Review While some women who received no prenatal care had normal, uncomplicated births, others did not. Most of the women who did not receive adequate prenatal care gave birth to an underweight and underdeveloped infant. Among the benefits of early, comprehensive prenatal care are decreased risk of preterm deliveries and low birth weight (LBW)-both major predictors of infant morbidity and mortality. (Dixon, Cobb, Clarke, 2000). Preterm deliveries, deliveries prior to 37 weeks of gestation, have risen. Since the studies in 1987, which showed the rate of preterm deliveries as 6.9% of births, the 1997 rate shows an increase to 7.5%. Low birth weight, defined as an infant weighing less than 2500 grams (5lbs. 5oz) is often preceded by preterm delivery. LowShow MoreRelatedThe Importance Of Prenatal Care843 Words   |  4 PagesThe Importance of Prenatal Care Pregnancy can either be the most wonderful time in a woman’s life or the scariest and quite often it is both at the same time. One of the first things that most women do when they become pregnant or even before they become pregnant is focus on their prenatal care. This time in the womb is very important in a baby’s development and taking care of the body is something that is extremely beneficial to the wellbeing of a newborn. 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In the challenging field of nursing, nurses need to be aware of cultural differences and should provide each client with cultural competent care. Each and every year, Haitians enter this country legally and illegally but regardless of how they enter the US, it is inevitable that they will need to be cared for at some time in their life. The astute nurse must understand the need for cultural sensitivity and what to assess for prior to providing care for a Haitian clientRead MoreInfant Mortality Rate ( Imr )872 Words   |  4 Pages E., Williams, H., 2015). Although, multiple analysis supports negative a relationship between IMR and health spending, many of the low health spending nations have much better ou tcomes when it comes to IMR than countries with high level of health care expenditures. Therefore, health spending not automatically guarantees better results when it comes to IMR. 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