A population of values has a normal distribution with μ = 158.9 μ = 158.9 and σ = 90.4 σ = 90.4 . You intend to draw a random sample of size n = 218 n = 218 . Find P39, which is the mean separating the bottom 39% means from the top 61% means. P39 (for sample means) =

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 158.9

Standard Deviation, σ = 90.4

We are given that the distribution is a normal distribution.

Formula:

We have to find the value of x such that the probability is 0.39

Calculation the value from standard normal z table, we have,  

133.68 separates the bottom 39% means from the top 61% means.

a) what number, when added to negative four, is equal to negative five?

step-by-step explanation: