Which hypothesis test would be used for the following research question? Are Alzheimer's rates really higher in women than men and is the longevity of women a factor?
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Which hypothesis test would be used for the following research question?
Are Alzheimer's rates really higher in women than men and is the longevity of women a factor?
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- What is the z-value for a two-sided hypothesis test on a population mean when a=.05? 1. 1.645 2. 2.58 3. 2.33 4. 1.96Only the question 5 and 6 need to be resolved. Others have been reaolved already. Question: sample of 15, 10 years old children was taken to study whether watching television reduces the amount of physical exercise, causing weight gains. The number of kilograms each child was overweight by was recorded (a negative number indicates the child is underweight). In addition, the number of hours of television viewing per week was also recorded. These data are listed in the table below. Television(hours) 42 34 25 35 37 38 31 33 19 29 38 28 29 36 18 Overweight (Kg) 8 3 0 0 6 6 3 3 -4 4 4 2 1 6 -3 Use an appropriate plot to investigate the relationship between Television(hours) and Overweight (KG). Briefly explain the selection of each variable on the X and Y axes and why? Calculate and interpret the coefficient of correlation (r) between Television(hours) and Overweight (KG).…What is H0? And why do we evaluate it instead of the scientific hypothesis?
- Can you guys help me on this? Thank you!Read the journal excerpt below:Exposure to light at night suppresses the physiologic production of melatonin, a hormone that has antiproliferative effects on intestinal cancers. Although observational studies have associated night-shift work with an increased risk of breast cancer, the effect of night-shift work on the risk of other cancers is not known. We examined the relationship between working rotating night shifts and the risk of colorectal cancers among female participants in the Nurses’ Health Study. We documented 602 incident cases of colorectal cancer among 78 586 women who were followed up from 1988 through 1998. Compared with women who never worked rotating night shifts, women who worked 15 years or more on rotating night shifts were 1.35 times more likely to develop colorectal cancer (95% CI = 1.03 to 1.77), adjusting for confounders. These data suggest that working a rotating night shift at least three nights per month for 15 or more years may increase the risk of…Populanty. 1.26 High school tobacco use. Despite the intense anti-smoking campaigns sponsored by both federal and private agencies, smoking continues to be the single-biggest cause of preventable death in the United States. How has the tobacco use of high school students changed over the past few years? For each of several tobacco products, high school students were asked whether they had used each of them in the 18 past 30 days. Here are some of the results: Year Product 2011 2012 2013 2014 2015 Any tobacco product 24.3 23.3 22.9 24.6 25.3 Cigarettes 15.8 14.0 12.7 9.2 9.3 Cigars 12.6 11.6 11.9 8.2 8.6 Pipes 4.5 4.0 4.1 1.5 1.0 Smokeless tobacco 7.3 6.4 5.7 5.5 6.0 E-cigarettes 1.5 2.8 4.5 13.4 16.0 The first row of the table gives the percentages of high school students who had used any tobacco product including cigarettes, pipes, cigars, smokeless tobacco, e-cigarettes, hookahs, snus, bidis or dissolvable tobacco in the last 30 days for the years 2011–2015. The remaining rows give…
- Example 5: A corporation psychologist believes that exercise affects self image. To investigate this possibility, 14 employees of the corporation are randomly selected to participate in a jogging programme. Before beginning the programme, they are given a questionnaire that measure self-image. Then they begin the jogging programme. The programme consists of jogging at a moderately taxing rate for 20 minutes a day, 4 days a week. Each employee's self-image is measured again after 2 months on the programme. The results are shown below (the higher the score, the higher the self-image); a score of 20 is the highest score possible. Subject 1 3 4 5 6 9. 10 11 12 13 14 Before Jogging 14 13 8. 14 12 7 10 16 10 14 15 12 9. After Jogging 20 16 15 12 15 13 12 13 16 18 14 17 18 15 (a) What is the alternative hypothesis? Use a non-directional hypothesis. (b) What is the null hypothesis? (c) Using a = (d) What error may you be making by your conclusion in part (c)? (e) To what population does your…BREAKFAST AND TEST SCORES 1 of 4 What type of test should this researcher use? Conventional wisdom says that eating a healthy breakfast can improve your health and your weight, but can it also affect your test scores? In order to test this, a school program convinces a group of students to skip breakfast one morning before taking a Basic English test. Eighteen students received breakfast before taking the test, and twenty-one students did not eat breakfast and recorded their performance on the English test. What type of research test should this researcher use? Their results are as follows:Do single-parent families tend to be more impoverished than families with two parents? In order to test if there is a relationship between family structure and family income level, family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. _________________________Family Structure____________________________ Total family Income One Parent Two Parents TOTAL Below poverty level 24 20 44 Not Below Poverty Level 11 45 56 Total 35 65 100 What are the independent and dependent variables.? What is the null hypothesis? What test should we use?…
