The shift supervisor of a pizza parlor claimed that the population mean total time to deliver a pizza is exactly 45 minutes. Pai
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Answer:
Step-by-step explanation:
Hello!
Interest hypothesizes is that the variance of the golfer's scores equals to δ²= 10.0.
A random sample of 28 rounds of golf had a sample standard deviation S= 3.5
The statistics hypotheses are:
H₀: δ²= 10.0
H₁: δ²≠ 10.0
α: 0.05
To conduct a hypothesis test for the population variance you have to work using the Chi-Square distribution, this test is two-tailed so you will have two critical values. Between these two values is defined as the "not rejection region" and below and above them lies the "rejection region"
Lower critical value:
Upper critical value:
If ≤ 16.928 or
≥ 40.113, the decision is to reject the null hypothesis.
If 16.928 < < 40.113, the decision is to not reject the null hypothesis.
The calculated is between the two critical values, so the decision is to not reject the null hypothesis. We can conclude that the population variance fro this golfers play score is 10.
I hope this helps!