Using the WSU STAT 110 Student Survey results one potential question of interest is whether or not the average WSU GPA differs between students who drink alcohol and those who don’t. A 95% CI for the difference in these population means is found to be . Which of the following statements would be true about the p-value for comparing these two population means using a (2 pts.) Less than .05, since the 95% confidence interval does not include zero. Greater than .05, since the 95% confidence interval does not include zero. Greater than .05, because the lower confidence limit is .10. It is impossible to tell. Short Answer Questions: A study was conducted in which the mean number of hangover symptoms was compared for students whose parents have alcohol problems (the YES group) and students whose parents do not (the NO group). There were 282 students in the study whose parents did have alcohol problems, and there were 945 students whose parents did not. Is there evidence that the mean number of hangover symptoms is higher for the population of students whose parents have alcohol problems than for the population whose parents do not? Carry out a formal hypothesis test to answer this research question. Step 0: You can assume that all assumptions for this test are met. Step 1: Convert the research question into H0 and Ha. (3 pts) Ho : Ha : Step 2: Determine α, the significance level. (1 pt.)
Using the WSU STAT 110 Student Survey results one potential question of interest is whether or not the average WSU GPA differs between students who drink alcohol and those who don’t. A 95% CI for the difference in these population means is found to be . Which of the following statements would be true about the p-value for comparing these two population means using a (2 pts.) Less than .05, since the 95% confidence interval does not include zero. Greater than .05, since the 95% confidence interval does not include zero. Greater than .05, because the lower confidence limit is .10. It is impossible to tell. Short Answer Questions: A study was conducted in which the mean number of hangover symptoms was compared for students whose parents have alcohol problems (the YES group) and students whose parents do not (the NO group). There were 282 students in the study whose parents did have alcohol problems, and there were 945 students whose parents did not. Is there evidence that the mean number of hangover symptoms is higher for the population of students whose parents have alcohol problems than for the population whose parents do not? Carry out a formal hypothesis test to answer this research question. Step 0: You can assume that all assumptions for this test are met. Step 1: Convert the research question into H0 and Ha. (3 pts) Ho : Ha : Step 2: Determine α, the significance level. (1 pt.)