Question

Question 5

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 31 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 31 students studied each week was 18.9 hours. The sample standard deviation of 3.7 hours.

Find the p-value.

The p-value should be rounded to 4-decimal places

Question 6

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 increases blood pressure. At the end of 4 weeks, 31 subjects in the study had an average change in blood pressure of 2.9 with a standard deviation of 5.3.

Find the p-value for the hypothesis test

*Your answer should be rounded to 4 decimal places.*

Question 7

Find the p-value for the hypothesis test. A random sample of size 54 is taken. The sample has a mean of 426 and a standard deviation of 82.

H0: µ = 400

Ha: µ > 400

The p-value for the hypothesis test is

*Your answer should be rounded to 4 decimal places.*

Question 8

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 37 expectant mothers have mean weight increase of 16.0 pounds in the second trimester, with a standard deviation of 6.1 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 the p-value for the hypothesis test.

*The p-value should be rounded to 4 decimal places.*

Answer #1

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 42 expectant mothers have mean
weight increase of 15.7 pounds in the second trimester,...

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 38 expectant mothers have mean
weight increase of 16.0 pounds in the second trimester,...

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 33 students was 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 33 students
studied each week was 22.2 hours. The sample...

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 that students study an
average of more than 20 hours each week. A random sample of 34
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 34 students studied each week was 21.5 hours....

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 that students study an
average of less than 20 hours each week. A random sample of 32
students were asked to keep a diary of their activities over a
period of several weeks. It was found that he average number of
hours that the 32 students studied each week was 19.1 hours....

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 31 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 31 students studied each week was
18.9 hours. The sample...

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 35 expectant mothers have mean weight increase of 16.1 pounds in
the second trimester,...

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 that students study an
average of less than 20 hours each week. A random sample of 34
students were asked to keep a diary of their activities over a
period of several weeks. It was found that he average number of
hours that the 34 students studied each week was 17.9 hours....

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 40 expectant mothers have mean weight increase of 16 pounds in
the second trimester,...

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 40 expectant mothers have mean weight increase of 16 pounds in
the second trimester,...

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