18 There are three steps involved in creating the comparison

18. There are three steps involved in creating the comparison distribution for the independent-samples t test, and those steps are repeated many times. Which of the following is the sequence described in our text? a. randomly select a pair of scores, subtract the second score from the first, record the difference between scores b. randomly select a group of scores, calculate their mean, and plot that mean on a distribution c. randomly select scores and calculate their mean as the group 1 mean, randomly select another group of scores and calculate their mean as the group 2 mean, subtract the second mean from the first d. randomly select a score, subtract the mean from the score, plot the difference

Solution

Answer: c. randomly select scores and calculate their mean as the group 1 mean, randomly select another group of scores and calculate their mean as the group 2 mean, subtract the second mean from the first

Reason: The data from 2 samples should be independently chosen, that is why this sequence is the most appropriate.