Question

For each of the following problems, just select which hypothesis test you would run to answer the question. Do not actually run it! Just name the appropriate test for each.

1. A psychology professor is trying to decide whether to use a textbook for next year’s stats class. To help him make the decision, the professor asks the current students what they prefer. The data is as follows:

	Book	No book
Men	8	22
Women	21	45

Do the data suggest that there is a gender difference in textbook preference?

2. For the following data, x represents a rating of a client’s satisfaction after the first therapy session (on a scale of 1-10). y represents the number of sessions attended by that client after three months.

Client	x : satisfaction	y : # sessions
A	7	16
B	5	2
C	6	1
D	3	2
E	4	9
F	10	12
G	3	4
H	10	11
I	6	8

A researcher hypothesizes that greater satisfaction after the first session will lead one to attend more sessions.

3. In a study of embarrassment, Harris (2001) asked participants to sing the Star Spangled Banner in front of a video camera while she recorded their heart rate for two minutes. The following are data similar to the research results.

     Participant          Baseline        1 minute        2 minutes

     1                            74                 88                 75

     2                            76                 90                 77

     3                            78                 89                 76

     4                            76                 85                 76

Do the data show significant changes in heart rate over time?

Answer 1

( 1 Use chi square test foe independence so that we can find  there is a gender difference in textbook preference

( 2 ) t test for independent  sample

( 3 ) one way dependent samples Anova