Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 16 colleges and universities in Kansas showed that x has a sample variance s2 = 79.1. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is greater than 47.1. Find a 95% confidence interval for the population variance Find the requested confidence interval for the population variance. (Round your answers to two decimal places.) upper and lower limit?
Let x represent the average annual salary of college and university professors (in thousands of dollars) in the United States. For all colleges and universities in the United States, the population variance of x is approximately σ2 = 47.1. However, a random sample of 16 colleges and universities in Kansas showed that x has a sample variance s2 = 79.1. Use a 5% level of significance to test the claim that the variance for colleges and universities in Kansas is greater than 47.1. Find a 95% confidence interval for the population variance
Find the requested confidence interval for the population variance. (Round your answers to two decimal places.)
upper and lower limit?
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