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The sample variance of a random sample of 50 observations from a normal population was found to be s2 = 45. a. Can we infer

The sample variance of a random sample of 50 observations from a normal population was found to be s2 = 45.

a. Can we infer at the 1% significance level that 2 is less than 50?

b. Estimate 2 with 90% confidence given that n = 15 and s2 = 12?

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