Basic Statistics Essay examples

1. Suppose a researcher wants to design a new study with a power of 0.8 and a significance of 0.05 to test whether the caffeine content for a brand of coffee is really 100mg. A previous study gave a mean caffeine level for this brand of 110 mg and a standard deviation of 7 mg. Use PROC POWER to determine how many cups of coffee need testing.

Why it is difficult for researchers to isolate specific causes of child behaviour - using two of your own examples. How is the term “correlation” a solution to this problem?

It sounds like using the stratified random sampling would be a good choice for using a particular group of people.  In stratified random sampling the individuals conducting the research know some things about the community that is providing date such as age, gender, ethnicity, and medical diagnosis. This is also a good option when there is a time restraint to obtain the information that is being gathered.  The survey would also have to be ensured it is written in a way that the average person can clearly understand the question to get a proper answer.

c. What kind of display would you use to show the association between job class and mode of

Multiple factors influence the rate of teen pregnancy. Some of the most important factors influencing pregnancy rates are socioeconomic status, education, and family income. With low socioeconomic status and income, parents may not always be present in their children’s lives in order to educate them on sex. School districts, then, take on the responsibility to educate teenagers on sexual intercourse and safe practices, but some fail. Stanger-Hall, K. F., & Hall, D. W. provided statistics showing that while many schools push abstinence-only programs, they show little to no positive impact on preventing teen pregnancies (Stanger-Hall, K. F., & Hall, D. W. (n.d.)). While abstinence may work for some, it is not realistic to believe that all teens will abide by it. Teens need a comprehensive sexual education with emphasis on safe sex practices, which is where Be Safe, Not Sorry comes into play. The comprehensive program will cover all

As time progresses, family structures are rapidly shifting. In 2007, unmarried parents produced 40% of US children. This was over twice the 18 percent in 1980 and about eight times greater than the 5% in 1960 (Waldfogel, Craigie, Brooks-Gunn, 2).  In a study of 5000 children in many large cities, 3,700 of them were born to unmarried mothers. According to Waldfogel, Craigie, and Brooks-Gunn, such familiar conditions are dangerous because of the way that single mothers and unmarried parents tend to have less stable lives and relationships

the correlation is 0.668; the equation of regression is CREDITS=11.7475*AGE-174.356; the slope is 11.7475 which is positive; when the predictor variable AGE increase, the response variable CREDITS also strongly increase; for instance, when AGE increase by 1, the CREDITS will increase 11.7475. There are some outliers may affect the correlation. Based on the graphs and data above, we can find out a student who is older with a litter lower GPA, but has very higher credits; the student with higher credits also has high GPA.

In this essay I will describe correlation is a measure of association as well as describe different methods of establishing a correlation between variables. In this essay I will also explain advantages and disadvantages of each method, were each must be applied, and provide particular circumstances and examples in which a researcher may want to establish correlation

“Nearly all (89.5%) of the participants received free or reduced cost lunches at school.” There was a high representation for a mother figure in the participant’s life, (75.6% and 11.% in respects to having a mother/ grandmother as a mother figure). 15.3% of the males identifies as not having a father figure. 73.4% believed that participant parents would be angry/or unhappy if participant was subjected to teen pregnancy. She points out how there was a significant gender difference in terms of the perception of parental views on getting pregnant or getting someone pregnant during the next year. More girls reported their parent would be angry/ or unhappy if they gotten pregnant in comparison to boys (77.8% vs. 67.0%, receptively). From this experiment they found that there was a high correlation between the way participant perceived the attitudes of their parents in regards to getting pregnant or getting someone pregnant and engaging in sexual

Young mothers tend to struggle to feed their children especially if they are single parents and they have to work. In research, done by Penman-Aguilar, Carter, Senead, and Kourtis, it explained the socioeconomic disadvantages related to the social determinant of teen childbearing. They first explained that the birth rate among teenagers in the United States has decreased drastically during the past few years, but they also explained that even though the numbers have dropped teens having a child so young can limit ones social and financial well-being (Penman-Aguilar et al. 2013, pg. 6). The researchers’ as well explained that teen motherhood has substantial costs for both the mother and the infant; teen motherhood can be considered that it is an indicator of suboptimal sexual health. According to Penman-Aguilar et al. (2013), social determinants of health are “complex, integrated, and overlapping social structures and economic systems are linked to lack of opportunity and to a lack of resources to protect, improve, and maintain health” (pg. 6), here it is explained that teen motherhood can be beyond the family or the individual. This was an important part of the opening of their research because it explains how there are possible theories about community-level socioeconomic factors may also contribute to teen

In the same year, the percentage of births outside marriages among teenagers aged 15-19 were as high as 94%. This assessment indicate that teenage mothers or parents to be are less likely to engage in marital actions until during, or after the end of pregnancy (hhs.org). 64% of unmarried teen mothers also become high-school dropouts, exposing themselves to the lack of job skills which will thus, lead to financial deficits (marchofdimes.org).

In How to Lie with Statistics (Huff, 1954), Darrel Huff deciphers statistical examples and explains the means of deception that statistics and statisticians sometimes use to relay false information. Huff also conveys an underlying message of don’t believe everything you’re told, something him and my mother have in common. At first glance, a reader might think that this book will teach people how to actually lie using statistics, but that is not the case. It gives the reader a glimpse or a behind the curtain view of how easily it is to be deceived using numbers and how it is slyly achieved. Ironically he calls the book How to Lie with Statistics almost to tease his audience that the content in this book is not as it appears. To my utmost surprise, I actually rather enjoyed this book. It was a fairly simple read that was filled with new information and showed me how to look closer at statistical figures in the future. The humor was spot on so much, so that I even chuckled aloud occasionally. For the icing on the cake, I even expanded my vocabulary to learn fun words such as rotogravure.

number 23 out of 30 top salaries in the league, they also had 96 wins

Corcoran, Franklin and Bennett (2000) confirm, “being part of a single-parent household seems to act as a risk factor for early pregnancy.” Among singe-parent households, “conflict within the family, stress, and less monitoring and control of children” occurs, which the authors say can increase the risk of teen pregnancy. In addition, “teenagers experiencing family problems might be more at risk for influence by a negative peer group” that could potentially lead to motherhood at an early age. They also claim “support is indicated for parental control over teen activities as a protective factor against teenage pregnancy” that a lot of times isn’t found in single-parent homes.

Teen pregnancy is a very controversial social issue and the vast majority of Americans consider the outrageous rate of teen pregnancies a severe issue, certainly a problematic occurrence that is believed to be a moral decline in our country. Teenagers are physiologically capable of reproducing but not emotionally or financially prepared to be parents at such a tender age. Through various research studies a plethora of determinants has pin pointed teens unprecedented pregnancies. One cause of this problem is the apparent indication of social separation or disadvantage. Within this issue you would find poverty, single parent households, educational disadvantages on the parents behalf, a lack family/parental support, and unemployment. A child’s educational performance, inappropriate sexual acts, and inferior apprehensions about their futures play a vital role in teen pregnancies as well. Amongst the listed disadvantages the three that take precedent are lacks of family communication, sexual abuse, and poverty. Furthermore, teen mothers do not fit the ideal ideology of the normative scheduling of motherhood, therefore, ultimately resulting in negative consequences for them and society. What needs to be understood is, as to why the numbers of teens are becoming parents at such a vernal age.