Question

Age of CEO
57	49	57	63	58
56	67	62	61	61
53	58	52	58	56
66	56	59	52	63
52	59	57	64	53
54	65	46	58	58
57	50	62	57	58
52	48	59	54	62
66	46	52	63	57
52	61	50	55	55
64	48	56	58	55
60	51	62	62	50
45	50	52	55	58
57	52	53	61
55	63	54	52
59	50	56	57
53	52	48	62
61	56	63	55
49	62	53	52
62	54	61	50
55	60	47	62
53	54	57	64

Data
Sample Standard Deviation				5.1
Sample Mean				56.3
Sample Size				101
Confidence Level				0.9950
Intermediate Calculations
Standard Error of the Mean				0.5077
Degrees of Freedom				100.0

t Value?
Interval Half Width?
Confidence Interval
Interval Lower Limit?
Interval Upper Limit?

Answer 1

Excel Addon PHStat used

Confidence Interval Estimate for the Mean
Data
Sample Standard Deviation	5.1020
Sample Mean	56.2970
Sample Size	101
Confidence Level	99.5%
Intermediate Calculations
Standard Error of the Mean	0.5077
Degrees of Freedom	100
t Value	2.8707
Interval Half Width	1.4574
Confidence Interval
Interval Lower Limit	54.8397
Interval Upper Limit	57.7544