for some positive value of z the probability that a standard

for some positive value of z the probability that a standard normal variable is below Z is 0.4129. The value of Z is ___?

Solution

Using table or technology,

z = -0.220091365 [ANSWER]

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Using Excel, you can type

=NORMSINV(left tailed area)

to get the said z score. Here, I type

=NORMSINV(0.4129)

on any empty cell, and got the answer.