Question

A sample of size 100 is chosen from a normally distributed mean,(µ) and standard deviation 60. A researcher has made the statement as follow to conclude that value of µ:

" reject H0:µ= 80 and accept H1: µ < 80. if x̅ < 68 "

a) if the significant level used is ∝%, find the value of ∝.

Answer 1

Z = (score-mean)/SEm

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

Answer 2

what is the score.. can u pls explain...