Question

Random samples of female and male UVA undergraduates are asked to estimate the number of alcoholic drinks that each consumes on a typical weekend. The data is below: Females (Population 1): 1, 5, 4, 3, 2, 5, 4, 2, 3, 2 Males (Population 2): 7, 4, 3, 4, 5, 7, 4, 4, 5, 4 Give a 92.6% confidence interval for the difference between mean female and male drink consumption. (Assume that the population variances are equal.) Confidence Interval =

Answer 1

	Females ( X )		Males( Y )
	1	4.41	7	5.29
	5	3.61	4	0.49
	4	0.81	3	2.89
	3	0.01	4	0.49
	2	1.21	5	0.09
	5	3.61	7	5.29
	4	0.81	4	0.49
	2	1.21	4	0.49
	3	0.01	5	0.09
	2	1.21	4	0.49
Total	31	16.9	47	16.1

Confidence interval :-

Lower Limit =
Lower Limit = -2.7487
Upper Limit =
Upper Limit = -0.4513
92.6% confidence Interval is ( -2.7487 , -0.4513 )