You want to obtain a sample to estimate a population mean. based on previous evidence, you believe the population standard deviation is approximately ? =62.3? =62.3. you would like to be 95% confident that your estimate is within 2 of the true population mean. how large of a sample size is required?
use a z* value accurate to two places for this problem. (not z = 2)
n =

n= 3,727.590 = 3,728

Step-by-step explanation:

Given that,

Population standard deviation, σ=62.3

Margin of error, ME=2

95% confidence interval

The margin of error is defined as:  ME= Z0.05/2 × σ/√n

2 = 1.96×62.3/√n

√n = 1.96×62.3

            2

√n = 61.054

n = 3,727.590 = 3,728

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