Question
Asked Oct 25, 2019
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Find the minimum sample size n needed to estimate
mu
μ for the given values of​ c,
sigma
σ​, and E.

c
equals
=
0.90

sigma
σ
equals
=
7.3
 and E
equals
=2
Assume that a preliminary sample has at least 30 members.

n=?


​(Round up to the nearest whole​ number.)

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Expert Answer

Step 1

It is given that confidence level is 0.90, standard deviation is 7.3 and margin of error E is 2.

Step 2

Here,

...
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Image Transcriptionclose

a 1-0.90 = 0.10 0.10 2 2 =0.05 a= 0.05 2 1.645 Using standard normal table

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Advanced Topics in Statistics

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