Mathematics, 20.11.2019 00:31 luvcherie18
The scores on a placement test given to college freshmen for the past five years are approximately nor- mally distributed with a mean μ = 74 and a variance σ2 = 8. would you still consider σ2 = 8 to be a valid value of the variance if a random sample of 20 students who take the placement test this year obtain a value of s2 = 20?
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