Question
In: Statistics and Probability
How large a sample should be selected so that the maximum error of estimate for a...
How
large a sample should be selected so that the maximum error of
estimate for a 95% confidence interval for the population mean is
2.1 Assume the population standard deviation is 10.5.
Solutions
Expert Solution
The minimum sample is calculated if the distribution assumed as normal :
Where E= Maximum error and Z =Standard normal score at significance level which is 1.96 for 95% confidence interval calculated using the Z table shown below with illustration.
and 
=Population
standard deviation=10.5
The Z table is:
orchestra answered 2 years agoRelated Solutions
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