Question

Suppose you are working with a data set that is normally distributed, with a mean of 150 and a standard deviation of 48. Determine the value of x from the following information. (Round your answers and z values to 2 decimal places, e.g. 1.25.) (a) 60% of the values are greater than x.

Answer 1

Explanation:

Find the z-value with a left tail of 0.40

invNorm (0.40) = -0.2533

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Find the corresponding x-value using x = z*s + u

x = -0.2533*20 + 400 = 394.93