Routine quality control checks are made on the contents of b

Routine quality control checks are made on the contents of bags of potato chips labelled to weigh 6 ounces. During these checks, the contents of 9 randomly selected bags potato chips are weighed giving a sample mean weight of 6.2 ounces and a sample standard deviation of 0.3 ounces. What is the p?value associated with the claim that the population mean weight of potato chips differs from 6 ounces?

a. p?value < 0.025

b. 0.025 < p?value < 0.05

c. 0.05 < p?value < 0.1

d. p?value > 0.1

e. None of the above

Why is it C and not B?

Solution

H0 = the population mean weight of potato chips differs from 6 ounces

H1 = the population mean weight of potato chips DOES NOT differs from 6 ounces

Degrees of freedom= 8

0.05 < p?value < 0.1