Hypothesis test for population variance or standard deviation:
The cholesterol levels of adult males are approximately normally distributed with a mean of 225 mg/dL and a standard deviation of 22.3. Some researchers claim that the standard deviation of cholesterol levels of adult males is greater than 22.3 . A sample of 23 adult males' blood tests had a mean of 226 mg/dL and a standard deviation of 29.0 . Is there enough evidence to conclude, at the 0.05 level of significance, that the standard deviation of cholesterol levels of adult males is greater than 22.3? Perform a one-tailed test.
Then fill in the table below.
1) The Null Hypothesis: H0
2) The alternative Hypothesis: H1
3) The type of test statistic:
4) The value of the test statistic:
5) The p-value:
6) Can we support the claim that the Standard deviation of cholesterol levels of adult males is greater than 22.3? Yes or NO?