In: Statistics and Probability
Use the indicated margin of error, the confidence level, and the population standard deviation to calculate the minimum sample size required to estimate an unknown population mean.
a) Error margin: 0.5 inch, confidence level: 95%, Standard deviation: 2.5 inch.
b) margin of error: 0.25 seconds, confidence level: 99%, standard deviation: 5.4 seconds.
c) Margin of error: $ 1, confidence level: 99%, standard deviation: $ 12.
d) Margin of error: 1.5 mm, confidence level: 95%, standard deviation: 8.7 mm