Post-Partum Depression Scores

The Edinburgh Postnatal Depression Scale (EPDS) is used to measure a woman's risk for postpartum depression in the first few months after delivery. A research study was performed to investigate if there was a difference in mean scores between women who used IVF and women who did not use IVF to conceive. Among the 28 women who used IVF to conceive, the mean EPDS score was 16 (standard deviation of 4). The 42 women who did not use IVF to conceive had a mean EPDS score of 11 (with a standard deviation of 2). Is there a difference in mean EPDS scores between women who use IVF to conceive compared to those who conceive without IVF? Assume alpha=.05.

Question 21

(1) What is the null hypothesis?

(2) What is the research hypothesis?

Question 21 options:

Blank # 1
Blank # 2

Question 22

What is the appropriate test statistic?

Question 22 options:

A)

Z-test

B)

t-test

C)	F-test (ANOVA)

D)	Chi-Square Goodness of Fit

E)	Chi-Square Test of Independence

Question 23

What is the critical value for the test statistic? Just give the number, not the name of the test. Round thenumberto the nearest hundredths place.

Question 23 options:

Answer

Question 24

What is the test statistic for this study? Just give the number, not the name of the test. Round to the hundredths place.

Question 24 options:

Answer

Question 25

Write your conclusion (in at least one complete sentence).

Question 25 options:

Insomnia and Ambien Study

A clinical trial wished to compare the number of sleepless nights that patients endured in a sleep trial using Ambien. Each of the 10 patients reported the number of sleepless nights before starting Ambien (no treatment) as well as the number of sleepless nights after taking Ambien for four weeks. The number of sleepless nights reported by each patient is recorded in the attached image. Do patientsexperience significantly more sleepless nights prior to taking Ambien as compared to after taking the Ambien treatment? Hint 1: Subtract "Ambien" from "No Treatment." Hint 2: If you calculate the standard deviation (Sd), it is 0.48. Assume alpha=.05.

Question 26

(1) What is the null hypothesis? (2) What is the research hypothesis?

Question 26 options:

Blank # 1
Blank # 2

Question 27

What is the appropriate test statistic?

Question 27 options:

A)

Z-test

B)

t-test

C)	F-test (ANOVA)

D)	Chi-Square Goodness of Fit

E)	Chi-Square Test of Independence

Question 28

What is the critical value for the test statistic? Just give the number, not the name of the test. Round thenumberto the nearest hundredths place.

Question 28 options:

Answer

Question 29

What is the test statistic for this study? Just give the number, not the name of the test.

Question 29 options:

Answer

Question 30

Write your conclusion (in at least one complete sentence).

Question 30 options: