freshmen for the past five years are approximately normally

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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Thescoresonaplacementtestgiventocollege

freshmenforthepastfiveyearsareapproximatelynormally

distributedwithamean=74andavariance

2=8.Wouldyoustillconsider2=8tobeavalid...