1 Table TV and Aggressiveness In a fictional study a pretest

1. (Table: TV and Aggressiveness) In a fictional study, a pretest-posttest design was used to examine the influence of a television program on children\'s aggressiveness. The number of aggressive responses was measured during an observation period both before and after the television program. Calculate the appropriate test statistic to hypothesis test whether or not there is a difference in the number of aggressive behaviors in children after having viewed the television program. Use = .05 and calculate the test statistic as a two tailed test.

    Table: TV and Aggressiveness

Participant

Before

After

1

  6

9

2

4

3

3

12

11

4

9

12

5

10

14

6

2

6

7

14

12

< a> What type of test statistic should be run to address the question presented? _______________________________________________

<b > What is the independent/quasi-independent variable?_______________________

< c> What is the dependent variable?_______________________

< d> Write the null and alternative hypotheses in both symbols and words:

< e> What is the critical value associated with this study?___________________

<f> Calculate your test statistic.

<g > Write your test statistic in APA format along with all other relevant details. _______________________________

<h > What conclusion should be made regarding the null hypothesis?

<i > Describe your conclusion in regards to the topic under study.

<j > Given your conclusion, what type of error could have possibly been made? If this error was made, describe what this would mean for the topic under study.

Solution

a.) Paired t statistics should be run.

b.) Independent variable: Children\'s aggressiveness.

c.) Dependent variable: Influence of television program.

d.) H0: before - after = 0 H1: before - after is not equal to 0

e.) Critical value= 0.05

h.)/P value = P(t<-1.4334) + P(t> 1.4334)

= 0.101 + 0.101

= 0.202

h.) We do not reject H0.

g.) There is no significant difference in the number of aggressive behaviors in children after having viewed the television program.

h.) Type 1 error can be made if we reject H0 when H0 is true. This would mean that there is a significant difference in the number of aggressive behaviors in children after having viewed the television program.