A group of 73 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 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 in a typical week differs from the mean of U.S. college students in general, which is estimated to be 4.73.

The group of 73 students in the study reported an average of 4.23 drinks per with a standard deviation of 3.75 drinks.

Find thep-value for the hypothesis test.

Thep-value should be rounded to 4-decimal places.

Commute times in the U.S. are heavily skewed to the right. We select a random sample of 50 people from the 2000 U.S. Census who reported a non-zero commute time.

In this sample the mean commute time is 28.7 minutes with a standard deviation of 19.7 minutes. Can we conclude from this data that the mean commute time in the U.S. is less than half an hour? Conduct a hypothesis test at the 5% level of significance.

What is thep-value for this hypothesis test?

(Your answer should be rounded to 4 decimal places.)

Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her university to see if there is evidence to show that this is not true at her university. A random sample of 30 students were asked to keep a diary of their activities over a period of several weeks. It was found that the average number of hours that the 30 students studied each week was 21.6 hours. The sample standard deviation of 3.4 hours.

Find thep-value.

Thep-value should be rounded to 4-decimal places.

A medical researcher is studying the effects of a drug on blood pressure. Subjects in the study have their blood pressure taken at the beginning of the study. After being on the medication for 4 weeks, their blood pressure is taken again. The change in blood pressure is recorded and used in doing the hypothesis test.

Change: Final Blood Pressure - Initial Blood Pressure

The researcher wants to know if there is evidence that the drug affects blood pressure. At the end of 4 weeks, 31 subjects in the study had an average change in blood pressure of -2.7 with a standard deviation of 5.3.

Find thep-value for the hypothesis test.

Your answer should be rounded to 4 decimal places.

Find thep-value for the hypothesis test. A random sample of size 55 is taken. The sample has a mean of 422 and a standard deviation of 85.

H0: = 400

Ha: 400

Thep-value for the hypothesis test is________.

Your answer should be rounded to 4 decimal places.

Child Health and Development Studies (CHDS) has been collecting data about expectant mothers in Oakland, CA since 1959. One of the measurements taken by CHDS is the weight increase (in pounds) for expectant mothers in the second trimester.

In a fictitious study, suppose that CHDS finds the average weight increase in the second trimester is 14 pounds. Suppose also that, in 2015, a random sample of 39 expectant mothers have mean weight increase of 15.9 pounds in the second trimester, with a standard deviation of 6.0 pounds.

A hypothesis test is done to see if there is evidence that weight increase in the second trimester is greater than 14 pounds.

Find thep-value for the hypothesis test.

Thep-value should be rounded to 4 decimal places.