Question

Calculate a 90% confidence interval when n = 34, σ = 2.3, and μ = 9.0...

Calculate a 90% confidence interval when n = 34, σ = 2.3, and μ = 9.0

A. 8.47-9.90

B. 7.98-10.00

C. 8.35-9.65

D. 8.23-9.77

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Given that, sample size ( n ) = 34

sample mean = 9.0

population standard deviation = 2.3

A 90% confidence level has significance level = 0.10 and critical value is,

90% confidence interval for is,

Thetefore,

Answer: C) 8.35 - 9.65

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