Problem 3. A sample of 16 items provides a sample standard deviation of 9.5. Test the following hypotheses using α = .05. What is your conclusion? Use the critical value approach.
H0: σ2 <= 50
Ha: σ2 > 50
Problem 4. Find the following F distribution values from the table.
a. F.05 with degrees of freedom 9 and 6
b. F.025 with degrees of freedom 25 and 7