College Students and Drinking Habits: A public health official is studying differences in drinking habits among students at two different universities. They collect a random sample of students independently from each of the two universities and ask each student how many alcoholic drinks they consumed in the previous week.The official conducts a two-sample t-test to determine whether these data provide significant evidence that students at University 1 drink more than students at University 2. The test statistic is t = 2.64 with a p-value 0.005.Which of the following is an appropriate conclusion? The samples provide significant evidence that students at University 1 drink more than students at University 2. The samples do not provide statistically significant evidence that there is a difference in drinking habits at the two universities. We cannot use the t-test in this case because the variables (number of drinks) are likely skewed to the right at each university.

A group of 75 college students from a certain liberal arts college were randomly sampled and asked about the number of alcoholic drinks they have in a typical week. The file containing the data is linked below. The purpose of this study was to compare the drinking habits of the students at the college to the drinking habits of college students in general. In particular, the dean of students, who initiated this study, would like to check whether the mean number of alcoholic drinks that students at his college have in a typical week differs from the mean of U.S. college students in general, which is estimated to be 4.73.Let μ be the mean number of alcoholic beverages that students in the college drink in a typical week. State the hypotheses that are being tested in this problem.

10 university students volunteered to participate in a study investigating the effect alcohol has on reaction time. Each student performed a reaction test. They then consumed 2 standard alcholic drinks. 20 mins after consumption they performed the same reaction test.The results from this study are going to be used to do a t-test of differences.Use the drop-down menus to identify if the following conditions for this test are satisfied or not.Paired data. AnswerThe sample is representative of the population. AnswerThe sampling distribution is normal.

What would your conclusions be if the dean of students suspected that the mean number of alcoholic drinks that students in the college consume in a typical week is lower than the mean of U.S. college students in general? In other words, if this were a test of the hypotheses:H0: μ = 4.73 drinks per weekHa: μ < 4.73 drinks per week

The university students from the US were asked about their alcohol consumption using two different versions of a question.In Version A, students were asked: How many drinks do you have on a typical day when drinking?In Version B, students were asked: How many standard drinks do you have on a typical day when drinking?Each student answered one version of the question in the survey, and the version they were asked was randomly allocated.The study found that the mean number of drinks reported was 6.58 when the question asked about standard drinks and the mean number of drinks reported was 4.70 when the question referred to drinks.The difference between these two means was found to be statistically significant at the 5% level.What additional information or analysis would you need before you could determine whether or not this result has practical importance?

Recall that the study reported that with 95% confidence, the underlying mean number of drinks consumed by Australian university students on a typical drinking day is somewhere between 4.8 and 6. Around 100 responses from Australian university students were used to construct this confidence interval.If the study had instead involved around 400 responses, given that the sample standard deviation did not change, the 95% confidence interval for the underlying mean number of drinks consumed by Australian university students on a typical drinking day would have been:about 1/2 as wideabout 1/4 as widepretty much unchangedabout 4 times wider