You want to obtain a sample to estimate a population mean. Based
on previous evidence, you believe the population standard deviation
is approximately σ=49.6σ=49.6. You would like to be 95% confident
that your estimate is within 1.5 of the true population mean. How
large of a sample size is required?
Solution:
standard deviation,σ = 49.6
Marginal Error,ME =1.5
95% confidence level i.e , = 0.05
we know that
The required large sample size is 4735
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