Question

1. We predict that children exhibit more aggressive acts after watching a violent television show. The scores for ten participants before and after watching the show are given below:

Before (X1)	After (X2)
4	5
6	6
3	4
2	4
4	7
1	3
0	2
0	1
5	4
2	3

				Mean		N		Std. Deviation			Std. Error Mean
Pair 1		Before		2.7000		10		2.05751			.65064
		After		3.9000		10		1.79196			.56667
												t		df	Sig. (2-tailed)
			Mean		Std. Deviation		Std. Error Mean		95% Confidence Interval of the Difference
									Lower	Upper
Pair 1	Before - After		-1.20000		1.13529		.35901		-2.01214	-.38786		-3.343		9	.009

1. What is your research hypothesis? _________________________________________________________________________
2. What is your null hypothesis?__________________________________________________________________
3. Which test was used for this problem? (be specific)__________________________________
4. What is t_crit? ________
5. How do you interpret the results? (be specific) ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answer 1

A. Research hypothesis: If children watch a violent television show then they exhibit more aggressive acts.

B. Null hypothesis: there are no changes in children's aggressive acts after watching a violent television show

C. The two sample t test was used for this problem.

D. tcrit is -2.262. ( df=9, alpha=0.05)

E. As tobs= -3.343< tcrit= -2.262 so reject the null hypothesis that is there are sufficient evidence to conclude that the children exhibit more aggressive acts after watching a violent television show