6.48 A random sample of size n = 16 is obtained from a normally distributed population with...

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6.48 A random sample of size n = 16 is obtained from a normally distributed population with a population mean of m = 114 and a variance of s2 = 484.

a. What is the probability that the sample mean is greater than 120?

b. What is the value of the sample variance such that 10% of the sample variances would be less than this value?

c. What is the value of the sample variance such that 10% of the sample variances would be greater than this value?

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