A Company That Makes Shampoo Wants to Test Whether the Average

Multiple Choice

A company that makes shampoo wants to test whether the average amount of shampoo per bottle is 16 ounces. The standard deviation is known to be 0.20 ounces. Assuming that the hypothesis test is to be performed using 0.10 level of significance and a random sample of n = 64 bottles, which of the following would be the upper tail critical value?

A) 1.28
B) 1.645
C) 1.96
D) 2.575