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(Solved): 10 You want to obtain a sample to estimate a population mean. Based on previous evidence, you believ ...
10
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately \( \sigma=22.1 \). You would like to be \( 92 \% \) confident that your esirnate is within \( 5.3 \) of the true population mean. How large of a sample size is required? Do not round mid-calculation. However, use a critical z value rounded to two (2) decimal places. \[ n= \]
Expert Answer
SOLUTION : Step 1: We use the following formula to estimate sample size, n= (z?/2?/E)2 Where, n=sample size, z?/2= z - value at ?/2 level of significance, ?=standard deviati