Question

Consider class data set to represent a simple random sample of the student. Construct the confidence intervals required and also write sample statistics calculated for each.

a) Calculate the 9% t-confidence interval for the mean pulse of all the student

B) Calculate the 95%confidence interval for the true proportion of all student who are registered

Voter Reg
Pulse Rate
64
75
74
65
72
72
60
66
60
69
89
64
71
50
80
80
62
85
60
65
92
70
60
87
98
56
92
88
66
70
66
66
92
96
80
80
89
61
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
No
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

Answer 1

Part A:

In the question you have asked for a 9% t Confidence Interval which is given below:

Part B:

Here total registered = 31

Total size = 40

So, the proportion = 31/40 = 0.775

As the sample size is more than 30.. Z statistics can be used in this regard..

End of the Solution...