A random sample of 138 observations produced a sample mean


A random sample of 138 observations produced a sample mean of 30. Find the critical and observed values of z for the following test of hypothesis using α=0.1. The population standard deviation is known to be 9 and the population distribution is normal.

H0: μ=28 versus H1: μ≠28.

Round your answers to two decimal places.

zcritical left =

zcritical right =

zobserved =

Solution Preview :

Prepared by a verified Expert
Business Management: A random sample of 138 observations produced a sample mean
Reference No:- TGS01721606

Now Priced at $20 (50% Discount)

Recommended (94%)

Rated (4.6/5)