iq is ormally distributed with a mean of 110 and a standard deviation of 8, if we want to make a special team with the 10% best, which is the lower iq score that can join this team?

Answer 1

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Answer 2

Prob ( z < k) = 0.9

Per the table via reverse look-up,

k = Inverse_normal(0.9) = 1.281551566....

z = (x-mean)/stndDev

z * stndDev + mean = x

1.28551566*8 + 110 = x

120.252412528 = x