The scores of a sample of 5 students, selected from a large population, are given below.
Score
70
80
60
90
75
?
a.Determine a point estimate for the variance of the population.b.Determine a 98% confidence interval for the variance of the population.c.At the 5% level of significance, test to determine if the variance of the population is less than or equal to 50.
What will be an ideal response?
?
| a. | 125 |
| b. | 37.659 to 1683.502 |
| c. | H0: ?2? 50 Ha: ?2> 50 |
| ?2 = 10 > 9.488(p-value is between .025 and .05); reject H0 | |
Business
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