Refer to Exercise 16.1. Assume that we collected additional data and had two more participants in the Younger group with scores of 13 and 15.

a) Rerun the analysis of variance.

b) Run an independent groups t test without pooling the variances.

c) Run an independent groups t test after pooling the variances.

d) For

(b) and (c), which of these values of t corresponds (after squaring) to the F in (a)?

Exercise 16.1

An important study in the memory literature is an old study by Eysenck (1974) in which he compared the recall of older participants under one of five levels of processing of the material.

He demonstrated that when asked to perform a higher level of processing of a list of words, participants showed better recall at a later time. Another aspect of Eysenck’s study compared Younger and Older participants on their ability to recall material in the face of instructions simply telling that they should memorize the material for later recall. (Presumably this task required a high level of processing, which older participants might not do well.) The data on 10 participants in each group follow, where the dependent variable is the number of items recalled.

Transcribed Image Text:

Younger 21 Older 19 17 15 22 10 19 14 5 16 22 22 61 20 10 2 25 14 15 || 18 21 ||