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

Question

Quizplus · Accepted Answer

The upper tail critical value for a one-tailed test at a 0.10 level of significance is 1.645.

A Company That Makes Shampoo Wants to Test Whether the Average