One population proportion test: Which of the following situations involves testing a claim about a single population proportion?  The National Institute of Mental Health estimates that in 2012, 6.9% of all U.S. adults had at least one major depressive episode in the past year. The university health center director believes that the figure for female college students is higher than this.  A CNN article reported that members of the class of 2013 graduated with an average $35,200 in college-related debt. A student is interested in investigating whether the average debt is higher among students graduating from her college this year.  Are women better at multitasking than men? Researchers conducted a multitasking experiment in which 120 men and 120 women played a computer game in which they were asked to carry out two tasks at the same time. The female group had an average speed that was faster than that of the male group.  A professor wants to know whether student performance is lower in earlier afternoon classes, compared to evening classes. The proportion of students who passed the most recent exam in her early afternoon class was 8% less than the proportion of students who passed the same exam in her evening class.

a. A study in 2002 examined depression among persons with dementia. The study recruited 201 adults with dementia admitted to a long-term care facility. Of the 201 cases, 91 had a prior diagnosis of depression. Over the first year, 7 adults developed depression. Calculate the cumulative incidence of depression among adults with dementia with one year. (Show working)

at O Tell me what you want to do... Exercise 2. Value of Education. The following table shows median annual earnings (in 2011) for women and men with various levels of education. (Source: U.S. Census Bureau.) Women Men High school only $21,113 $40,447 Associate's degree only $39,286 $50,928 Bachelor's degree only $49,108 $66,196 Professional degree $80,718 $119,474 As a percentage, how much more does a man with a bachelor's degree earn than a woman with a bachelor's degree? Assuming that difference remains constant over a 40-year career, how much more does the man earn than the woman?

1. A researcher expects that the number of people (18 years and older) who report binge drinking in the past month will be higher for Appleton WI residents as compared to the national rate, which is 25%. The researcher samples 100 residents from Appleton WI (age 18+) and finds that 36 of the 100 Appleton residents reported binge drinking in the past month. Using this data set answer the following questions: A. What is yobt? B. What is the df for this test?

Student Debt. The Association of American Universities published a report titled “Looking More Closely at Student Debt.” This report explores the issue about the cost of a college education and its impact on student loan debt. Using information from a credit reporting company, the following table provides a percentage distribution for the loan balance of outstanding student loans from individuals with graduate, professional, and undergraduate degree debt.   Loan balance Percentage $1–$10,000 43.1 $10,001–$25,000 29.2 $25,001–$50,000 16.5 $50,001–$75,000 5.8 $75,001–$100,000   2.3 $100,001 or more 3.1     Suppose that one of these individuals is selected at random. a. Without using the general addition rule, determine the probability that the individual obtained has a loan balance either between $10,001 and $100,000, inclusive, or at most $75,000. b. Obtain the probability in part (a) by using the general addition rule. c. Which method…

B. Using data from the 2016 General Social Survey, you wish to understand whether men and women are equally likely to believe that grown children should move back with their parents. The below table shows the crosstab of these two variables using column percentages, with further statistical information reported below. Should grown children move back with parents A good idea A bad idea It depends Total Respondents sex Male 85 39.35 90 41.67 41 18.98 216 100.00 Pearson's chi2(2) = 10.7158 Pr = 0.005 Cramer's V = 0.1548 Female 1.07 46.32 63 27.27 61 26.41 231 100.00 Total 192 42.95 153 34.23 102 22.82 447 100.00

A descriptive statistic is generally defined as: a. the entire group of interest about which we want to make conclusions. b. a single number or group of numbers that organize, summarize, and communicate a group of numerical observations. c. a subset, or smaller collection, of observations from the overall group of interest. d. using data to make general estimates about the overall group of interest.

Consumer Research, Inc.   Consumer Research, Inc., is an independent agency that conducts research on consumer attitudes and behaviors for a variety of firms. In one study, a client asked for an investigation of consumer characteristics that can be used to predict the amount charged by credit card users. The following data were collected on annual income, household size, and annual credit card charges for a sample of 50 consumers.   Managerial Report     Use methods of descriptive statistics to summarize the Comment on the findings.     Develop estimated regression equations, first using annual income as the independent variable and then using household size as the independent variable. Which variable is the better predictor of annual credit card charges? Discuss your findings.     Develop an estimated regression equation with annual income and household size as the independent Discuss your findings.     What is the predicted annual credit card charge for a three-person…

A report states the following percentiles corresponding to the amount of student borrowing for college graduates.   10th percentile $0 25th percentile $0 50th percentile $11,000 75th percentile $24,600 90th percentile $39,3000 For each of these percentiles, write a sentence interpreting the value of the percentile.

You may need to use the appropriate appendix table or technology to answer this question. The increasing annual cost (including tuition, room, board, books, and fees) to attend college has been widely discussed (Time.com). The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Private Colleges Public Colleges 52.8 44.2 45.0 33.3 44.0 20.3 22.0 28.2 15.6 24.1 28.5 31.6 44.8 36.8 50.5 43.0 22.8 25.8 18.5 25.6 14.4 21.8 (a) Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for private colleges. (Round the standard deviation to two decimal places.) sample mean $ 42.6 v thousand sample standard deviation $ 6.85 v thousand Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for public colleges. (Round the standard deviation to two decimal places.) v thousand v thousand sample mean $ 22.3 sample standard deviation $ 4.53 (b) What…