A 100(1 x)% confidence interval for the mean of a normal population when the value of a is known is given by (x-Zα/2 σ Vn x + ²a/2* √n). By how much must the sample size n be increased if the width of the CI above is to be halved? Halving the length requires n to be increased by a factor of If the sample size is increased by a factor of 49, what effect will this have on the width of the interval? Increasing the sample size by a factor of 49 will ---Select-- the length by a factor of
A 100(1 x)% confidence interval for the mean of a normal population when the value of a is known is given by (x-Zα/2 σ Vn x + ²a/2* √n). By how much must the sample size n be increased if the width of the CI above is to be halved? Halving the length requires n to be increased by a factor of If the sample size is increased by a factor of 49, what effect will this have on the width of the interval? Increasing the sample size by a factor of 49 will ---Select-- the length by a factor of
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A 100(1 x)% confidence interval for the mean μ of a normal population when the value of σ is known is given by
(x-²α/2"
σ
n
za/2 √n).
X + Z
I
By how much must the sample size n be increased if the width of the CI above is to be halved?
Halving the length requires n to be increased by a factor of
If the sample size is increased by a factor of 49, what effect will this have on the width of the interval?
Increasing the sample size by a factor of 49 will |---Select--- the length by a factor of
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