Find a 90% confidence interval for the population variance. (f) Find the requested confidence interval for the population variance. (Round your answers to two decimal places.) lower limit upper limit (b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.) What are the degrees of freedom?
Let x = age in years of a rural Quebec woman at the time of her first marriage. In the year 1941, the population variance of x was approximately σ2 = 5.1. Suppose a recent study of age at first marriage for a random sample of 41 women in rural Quebec gave a sample variance s2 = 3.3. Use a 5% level of significance to test the claim that the current variance is less than 5.1. Find a 90% confidence interval for the population variance.
(f) Find the requested confidence interval for the population variance. (Round your answers to two decimal places.)
| lower limit | |
| upper limit |
(b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)
What are the degrees of freedom?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 4 images
