• Points30

• Questions10

• Time Limit45 Minutes

• Allowed Attempts Unlimited

Instructions

The quiz:

• Covers the Textbookmaterial from Module 3: .
• Contains10 multiple-choice 
• Is limitedto 45 minutes.
• Allows unlimited attempts and the highest attempt will count towards the grade.
• Is worth 30 points.

Question 1

3 / 3 pts

What can we know from our results of a study that we have failed to reject the null hypothesis?

Correct!

the sample means were not statistically different from one another

we have committed Type II error

the theoretical population are not different from one another

there was no sampling error

Question 2

3 / 3 pts

Which of these is an acceptable interpretation of a non-significant outcome in research?

Correct!

researchers should fail to reject the null hypothesis

the null hypothesis should be accepted

the null hypothesis should be rejected

results must be incorrect

Question 3

0 / 3 pts

A Type II error occurs if:

You Answered

researchers reject the null hypothesis when they should not have rejected it

Correct Answer

researchers fail to reject the null hypothesis when they should have rejected it

researchers reject the null hypothesis when they should have rejected it

researchers fail to reject the null hypothesis when they should not have rejected it

Question 4

3 / 3 pts

If the nominal alpha is set to .05, what p value would be considered statistically significant?

Correct!

.022

.22

2.2

22

Question 5

3 / 3 pts

A Type I error occurs if:

Correct!

researchers reject the null hypothesis when they should not have rejected it

researchers fail to reject the null hypothesis when they should have rejected it

researchers reject the null hypothesis when they should have rejected it

researchers fail to reject the null hypothesis when they should not have rejected it

Question 6

3 / 3 pts

If nominal alpha is set to .01, which of these p values would be considered criteria for rejecting the null hypothesis?

Correct!

.009

.03

.04

.042

Question 7

3 / 3 pts

When we fail to reject the null hypothesis we:

Correct!

claim there is no difference

reject the null hypothesis

reject the alternative hypothesis

claim there is a difference

Question 8

3 / 3 pts

The advantage of using Cohen’s d is that it provides a difference in group means based on the:

Correct!

standard deviation of the scores

units of measurement for the scores

variance of the scores

outliers of the scores

Question 9

0 / 3 pts

When we reject the null hypothesis we:

Correct Answer

claim there is a difference

reject the real hypothesis

claim there is no difference

You Answered

reject the alternative hypothesis

Question 10

3 / 3 pts

What can lead to a large difference between a population mean and a sample mean?

Correct!

sampling error

random sampling

an incorrect alpha level

a small test statistic