quiz 8

Question 1

Which of the following is the null hypothesis for a repeated measures t-test?

Answer 1

H0: μD = 0

Question 2

Which of the following is the null hypothesis for an independent samples t-test?

Answer 2

𝐻0: 𝜇1 − 𝜇2 = 0

Question 3

We calculate Cohen’s d for our independent sample’s t-test. The obtained value was 0.65. This would be considered a large effect.

Answer 3

False

Question 4

Which of the following is not a way we can test change and difference over time using the t-statistic?

Answer 4

Whether a parent and child agree on the quality of home life.

Whether romantic partners agree on the seriousness of the relationship.

Whether or not individuals increase their level of exercise after a behavior modification plan.

The attitudes of 20- and 40- year old individuals in relation to changes to social security done this year. (this is the wrong one)

Question 5

The t statistic tests the value of a sample mean compared to what we expect of the population, making it similar to the ______.

Answer 5

z statistic

Question 6

The assumption of homogeneity of variance is important to ______ t-tests.

Answer 6

Independent samples

Question 7

Which of the following is the null hypothesis for a one-sample t-test?

Answer 7

H0: μ = 38

Question 8

The t-distribution has a mean of ____ and a standard error of _____.

Answer 8

0; 1

Question 9

Pooled variance is used in which type of t-test?

Answer 9

Independent samples

Question 10

Which of the following is another name for a repeated measures t-test?

Answer 10

Matched pairs
Paired samples
Dependent measures/samples

Question 11

A researcher conducts a study investigating the length of time it takes for students to complete a new homework assignment compared to an old one. The following t-statistic is obtained: t(3) = 3.46, p < .05. What decision should he make?

Answer 11

Reject the null hypothesis.