I have a problem with stating the right Hypothesis Test for the following problem (chi-squared test):
“A study was conducted to determine whether the standard deviation of monthly maintenance costs of a Pepper III aircraft is $300.”
The correct statement is:
- H0: pop. variance = 300^2
- Ha: pop. variance =/ 300^2
However, when I read the problem, I was sure that Ha: pop. variance = 300^2. The solution says that the wording is a little tricky, but it does not explain how I am supposed to interpret it… Could you guys explain me the right way to interpret the wording of the problem? Thank you so much!