Find the 95th percentile

What will be an ideal response?


Find x0 such that P(X ? x0 ) = 0.95 = P(Z ? z0 ).
Since the area to the left of z0 is greater than .5, z0 must be larger than zero such that P(0 < Z < z0 ) = 0.45, so z0 = 1.645. Thus, x0 = 75 + (1.645 )(4 ) = 81.58

Business

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