Question

1. It is thought that 65% of American adults drink alcohol of one kind or another. Are college students like other American adults?
   1. A university dean wants to estimate the percentage of students at her university who drink alcohol of one kind or another. If she wants to estimate this percentage to within ±3% with 95% confidence, how many students should she sample?

2. In a random sample of 1200 college students, 828 say they drink alcohol of one kind or another. Construct a 90% confidence interval for the percentage of college students who drink alcohol of one kind or another. Make sure to state and check all conditions and state your conclusion in context.

3. Use your confidence interval in part b to test if the percentage of college students who drink alcohol of one kind or another differs from the 65% figure for American adults. Make sure to state the hypotheses, but you do not need to check the conditions.

2. How often do students experience high levels of engagement in the classroom? A Gallup Youth Survey asked 13- to 17-year-olds a series of questions about how emotionally involved they typically feel in class. The survey asked students how often they get so involved in learning that they lose track of time in the classroom, since this is a good measure of engagement. A random sample of 600 students was selected, and 462 said that they lose track of time at least sometimes. Are more than 75% of students so engaged in the classroom that they lose track of time? Test an appropriate hypothesis and state your conclusion. Make sure to state and check all conditions and state your conclusion in context.

Answer 1

Therefore the Hypothesis concludes sample is not enough to to conclude the evidence.