Suppose that weights of 5th grade elementary girls are normally distributed with mean µ = 64...

Question

Question

Suppose that weights of 5^th grade elementary girls are normally distributed with mean µ = 64 lbs and standard deviation σ = 6.6 lbs. Find the weight that corresponds to P₄₂ and interpret this measure of position.

math Statistics-And-Probability

Answer 1

Answer #1

solution

Using standard normal table,

P(Z < z) = 42%

= P(Z < z) = 0.42

= P(Z < -0.20) = 0.42

z = -0.20 Using standard normal z table,

Using z-score formula

x= z * +

x= -0.20* 6.6+64

x= 62.68

x=63

Answer 2

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