Question

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=38.5σ=38.5. You would like to be 98% confident that your esimate is within 1 of the true population mean. How large of a sample size is required?

n =



Do not round mid-calculation. However, use a critical value accurate to three decimal places — this is important for the system to be able to give hints for incorrect answers.

LicenseQuestion 4. Points possible: 1

Answer 1

Given, 98% confidence interval, d=38.52 and ME = 1 sample size (n) = 2:02 (2.326) 38.52 = 8019.38 = 8020 ME? if the critical value takes more then 3 decimal places then sample size ( ) = zo_(2.326348) 38.52 8021.78 = 8022 (1)