Mathematics, 14.11.2019 04:31 sierravick123owr441
The scores on a placement test given to college freshmen for the past five years are approximately normally distributed with a mean µ = 74 and a variance σ 2 = 8. would you still consider σ 2= 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 s 2 = 20?
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