Suppose a survey of 899 college students who were asked about their smoking behavior. Of the students surveyed, 262 classified themselves as nonsmokers, but said "yes" when asked later in the survey if they smoked. These students were classified as "phantom smokers," meaning that they did not view themselves as smokers even though they do smoke at times. The authors were interested in using these data to determine if there is convincing evidence that more than 25% of college students fall into the phantom smoker category. Suppose that the sample of 899 college students can be regarded as representative of college students in the United States. (a) What hypotheses would you test to answer the question posed? H0: p = 0.25  versus  Ha: p ≠ 0.25 H0: p ≠ 0.25  versus  Ha: p = 0.25      H0: p = 0.25  versus  Ha: p > 0.25 H0: p < 0.25  versus  Ha: p > 0.25 H0: p = 0.25  versus  Ha: p < 0.25 (b) Is the sample size large enough for a large-sample test for a population proportion to be appropriate? YesNo     (c) What is the value of the test statistic and the associated P-value for this test? (Use a table or SALT. Round your test statistic to two decimal places and your P-value to four decimal places.) z=P-value= (d) If a significance level of 0.05 were chosen, would you reject the null hypothesis or fail to reject the null hypothesis? Reject H0.Fail to reject H0.

Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults.  How common is it?  A survey of 10,904 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems.  The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks.  According to this definition, 2486 students were classified as frequent binge drinkers.  Construct and interpret a 99% confidence interval for the proportion of students who are classified as binge drinkers. (Use the four-step process.)   What would you include in "State" from the 4-step process?

You may need to use the appropriate appendix table or technology to answer this question. Fewer young people are driving. In year A, 61.9% of people under 20 years old who were eligible had a driver's license. Twenty years later in year that percentage had dropped to 49.7% Suppose these results are based on a random sample of 1,800 people under 20 years old who were eligible to have a driver's license in year A and again in year B. (a) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year AT (Round your answer to four decimal places) 022 At 95%, confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimal places.) to (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year 82 (Round your answer to four decimal places) At…

The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker. We perform a one-way, independent-samples ANOVA test, with the "groups" in the ANOVA being categories of highest educational degree of the worker ("less than high school," "bachelor's degree," etc.) and the variable being the number of hours written down by the worker in answering the survey question. (a) Suppose that the results of our ANOVA are given in the ANOVA table below. Complete the missing cell of the ANOVA table (rounding your answer to two decimal places). Source of Degrees of,Sum of variation Between freedom squares…

Consider the hypothetical study described below. Based solely on the information given, do you have reason to question the results of the study? Select all that apply. Sociologists studying domestic violence circulate a questionnaire asking each respondent if she or he has ever abused a spouse or partner. a. Yes, there is reason. The people receiving the questionnaire might not be representative of the population. b. No, there is no reason. It is unlikely that there are any confounding variables in the study c. No, there is no reason. The goal of the study is clear. d. Yes, there is reason. Self-reporting is often not accurate. e. No, there is no reason. There is no bias in the study 1. Yes, there is reason. The wording of the question might produce inaccurate or dishonest responses,

An issue of Time Style and Design reported on a poll conducted on the shopping habits of wealthy Americans. A total of 603 interviews were conducted among a national sample of adults with household incomes of at least $150,000. Of the adults interviewed, 410 said they had purchased clothing, accessories or books online in the past year. We want to understand the percentage of wealthy Americans who shop online. Do the data provide sufficient evidence to say that the majority (more than 50%) of wealthy Americans shop online at the 5% significance level? a. What are n, x, n-x and ??̂? b. State the null and alternative hypotheses. c. What is the value for the test statistic z0? d. Find the p-value. e. Do the data support that (more than 50%) of wealthy Americans shop online?

I am being told that the sample size answer of 384 given to me was incorrect. Is there any way this was miscalculated?

Alcohol abuse has been described by college presidents as the number one problem on campus, and it is an important cause of death in young adults.  How common is it?  A survey of 10,904 randomly selected U.S. college students collected information on drinking behavior and alcohol-related problems.  The researchers defined “frequent binge drinking” as having five or more drinks in a row three or more times in the past two weeks.  According to this definition, 2486 students were classified as frequent binge drinkers.  Construct and interpret a 99% confidence interval for the proportion of students who are classified as binge drinkers. (Use the four-step process and Table A to get your z* value.)   Using the interval that you calculated in the last question, conclude in context for the question.

Results from the 2015 IPEDS Report indicate that about 1 out of 25 students at Mohawk Valley Community College identify themselves as being of Asian descent.  Which of the following choices is the best estimate for the percentage of students at MVCC who identify themselves as of Asian descent?     0.4%     2.5%     0.04%     4%     25%     0.25%

A survey by the National Institutes of Health asked a random sample of young adults (aged 19 to 25 years), "Where do you live now? That is, where do you stay most often?" Here is the full two-way table (omitting a few who refused to answer and one who reported being homeless): Survey Type Female Male Total Parents' home 923 986 1909 Another person's home 144 132 276 Living location Own place 1294 1129 2423 Group quarters 127 119 246 Total 2488 2366 4854 Should we use a chi-square test for homogeneity or a chi-square test for independence in this setting? Justify your answer. Chi-square test for homogeneity. The data came from a single random sample (n = 4854 young adults aged 19 to 25 vears), with the individuals classified according to two categorical variables (gender and "Where do you live now?"). O Chi-square test for homogeneity. The data came from two independent random samples (n=2488 young adult females and n = 2366 young adult males aged 19 to 25 years), with the individuals…