What is probability that sample variance would be more

Reference no: EM13213957

A math test of 100 questions was given to a random sample of 20 freshman. Suppose that for the population of freshman the distribution of number of correct answers would be normal with a variance of 250.

a) what is the probability that the sample variance would be less than 100?

b) what is the prob. that the sample variance would be more then 500?

Reference no: EM13213957

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