Question 1 The null hypothesis for the independent-measures t test states that t

Question

Question 1

The null hypothesis for the independent-measures t test states that there is no difference between the two sample means.

True

False

Question 2

For an independent-measures research study, what is measured by Cohen’s d or r2?

A. The risk of a Type I error

B. Whether the difference between the two treatments is likely to have occurred by chance

C. The risk of a Type II error

D. The size of the difference between the two treatments

Question 3

If an independent-measures t statistic has df = 20, then there were a total of 18 individuals participating in the research study.

True

False

Question 4

An independent-measures study uses two samples, each with n = 10, to compare two treatment conditions. What is the df value for the t statistic for this study?

A. 18

B. 8

C. 9

D. 19

Question 5

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

A. ì1 – ì2 = 0

B. ì1 – ì2 0

C. M1 – M2 = 0

D. M1 – M2 0

Explanation / Answer

Question 1

The null hypothesis for the independent-measures t test states that there is no difference between the two sample means.

True

Ho : miu 1 = miu 2

Question 2

For an independent-measures research study, what is measured by Cohen’s d or r2?

A. The risk of a Type I error

Question 3

If an independent-measures t statistic has df = 20, then there were a total of 18 individuals participating in the research study.

False

n = df + 1 = 20 + 1 = 21

Question 4

An independent-measures study uses two samples, each with n = 10, to compare two treatment conditions. What is the df value for the t statistic for this study?

C. 9

Question 5

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

C. M1 – M2 = 0

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