80 97 72 85 N 55 47 77 86 92 82 78 a) Construct a 95% confidence interval estimate for the class mean grade. b) Construct a 90% confidence interval estimate of proportion of students who scored above 80. (Hint: You can use the Standard Normal Distribution Excel Table below for calculating z values)
80 97 72 85 N 55 47 77 86 92 82 78 a) Construct a 95% confidence interval estimate for the class mean grade. b) Construct a 90% confidence interval estimate of proportion of students who scored above 80. (Hint: You can use the Standard Normal Distribution Excel Table below for calculating z values)
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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80
97
72
85 N 55
47
77
86
92
82
78
a) Construct a 95% confidence interval estimate for the class mean grade
b) Construct a 90% confidence interval estimate of proportion of students who scored above 80.
(Hint: You can use the Standard Normal Distribution Excel Table below for calculating z values)"
Transcribed Image Text:of 15, i.e., o=15.
80
97
72
85 N 55
47
77
86
92
82
78
a) Construct a 95% confidence interval estimate for the class mean grade
b) Construct a 90% confidence interval estimate of proportion of students who scored above 80.
(Hint: You can use the Standard Normal Distribution Excel Table below for calculating z values)

Transcribed Image Text:Question No: 03
a) Construct a 95% confidence interval estimate for the class mean grade.
b) Construct a 90% confidence interval estimate of proportion of students who scored above 80.
(Hint: You can use the Standard Normal Distribution Excel Table below for calculating z values)
Standard Normal Distribution
Excel Table
NORM.S.INV(0.005)= -2.58
NORM.S.INV(0.01)= -2.33
NORM.S.INV(0.025)= -1.96
NORM.S.INV(0.05)= -1.64
NORM.S.INV(0.10)= -1.28
NORM.S.INV(0.20)= -0.84
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