Question

Answer all parts

Part A. If the null hypothesis states that µD=0 and a researcher obtained a Confidence Interval of CI 95% = (-1.95, 2.10), can the researcher conclude that there is a significant difference between their groups? (Multiple choice.)

a. There is not enough information to answer this question

b. No, because it was only a 95% confidence interval

c. No, because the range include 0

d. Yes, because the range includes 0

Part B.

A research calculates a Cohen’s d of d=0.6. What size effect does this research have?

Group of answer choices

a. Small effect

b. Large effect

c. Medium effect

d. Very small effect

Part C. How do you find a difference score?

Group of answer choices

a. You square the deviations from the mean.

b. You subtract the person’s before score from their after score.

c. You subtract each score from the mean.

d. You add each person’s before and after scores together.

Part D. How many samples do the independent- and repeated-measures t-test each use?

Group of answer choices

a. 2

b. Any number the researcher wants

c. 1

d. 3

Answer 1

The solution to this problem is given by