Question

Independent Sample T-Test

Researchers were interested in determining whether grounding techniques can decrease the length of panic attacks with people diagnosed with severe anxiety disorder. Subjects were randomly assigned into two different groups. Group 1 served as a control group, while Group 2 were taught various grounding techniques to manage their anxiety. Subjects were instructed to time their next panic attack and to record the length in minutes. Alpha (level of significance) was set at .05.

1. State the null and alternate hypotheses.
2. Complete the table below:

	No Grounding	Grounding
Sample Size	250	250
Sample Mean	15.05	11.09
Sample Standard Deviation	3.277	2.073
Estimated Standard Error	0.207	0.131

Group Statistics
	Grounding	N	Mean	Std. Deviation	Std. Error Mean
Minutes	Without grounding	250	15.05	3.277	.207
	With grounding	250	11.09	2.073	.131

Answer the following questions using the table below.

5. What is the mean difference?
6. What was the t value and degrees of freedom?
7. What was the p value?
8. Draw a conclusion based on the hypotheses.

Independent Samples Test

	t	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference	95% Confidence Interval Lower	95% Confidence Interval Upper
Minutes	16.163	498	.000	3.964	.245	3.482	4.446

Answer 1