Textile Engineering > GATE 2016 > Probability and Statistics
If the length of a confidence interval on the mean of a normal distribution with known variance is to be halved, the sample size must
A
increase by 2 times
B
decrease by 2 times
C
increase by 4 times
D
decrease by 4 times

Correct : c

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confidence interval mean normal distribution sample size increase decrease GATE textile engineering 2016 textile engineering gate confidence interval length sample size variance GATE 2016 Textile Engineering effect of sample size on confidence interval

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