Mathematics, 08.11.2019 21:31 alma79
Consider a variable known to be normally distributed with unknown mean and known standard deviation =10.
(a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? the multiplier for a z confidence interval with a 95% confidence level is the critical value z∗=1.960. (enter your answer rounded to three decimal places.)
margin of error =25=
(b) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 100? based on a random sample size of 400? (enter your answers rounded to three decimal places.)
margin of error n=100:
margin of error n=400:
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