margin of error

Question

Find the margin of error in estimating the population mean:

confidence level = 94%

sample size = 86

sample mean = 113.5

standard deviation = 12.7

Answer 1

MOE = x̄ ± z(s/√n)

MOE = 113.5 ± 1.88(12.7/√113.5)

MOE = {111.2589,115.7411}

Hope this helped! Note that the critical value for a 94% confidence level is z=1.88