Module 4 T-Tests

Question 1

What must you obtain when running any t-test?

Answer 1

A t-value

Question 2

How do you obtain a t value?

Answer 2

Mean 1 minus mean 2 divided by the difference of the two means

Question 3

What does it mean if you have a large t-value?

Answer 3

The two means are far apart

Question 4

True or False?
If you have a large t-value your p-value will also be large.

Answer 4

False. If you have a large t-value your p-value will be small.

Question 5

What do you do if the p-value is less than or equal to the alpha?

Answer 5

You REJECT the null hypothesis

Question 6

How do you determine if a significant difference is MEANINGFUL?

Answer 6

By looking at the Effect Size (ES)

Question 7

What does the effect size do?

Answer 7

Puts the difference between the groups in standard deviation units

Question 8

What does an effect size of 1.0 mean?

Answer 8

One group scored one SD higher than the other group

Question 9

What is the most common situation for a dependent t-test?

Answer 9

A pre-test and a post-test

Question 10

What is a One Sample T-test?

Answer 10

A test used to compare the sample mean to the population mean.

Question 11

What do you need to use a One Sample t-test?

Answer 11

The population mean

Question 12

True or False?
All t-tests are used to compare two means.

Answer 12

True.