Question

Lee missed the lesson on normal distribution and needs to do his homework. Explain to Lee how to use the mean and standard deviation of a normal distribution to determine the top 6% of the population.

Answer 1

Find the z-score that corresponds to 0.94

Answer 2

.9395

Answer 3

ok, what z is that ?

Answer 4

1.5, I think.

Answer 5

@phi

Answer 6

now you can answer
Explain to Lee how to use the mean and standard deviation of a normal distribution to determine the top 6% of the population.

1) Find the z-score that corresponds to 0.94 (= 1 - 0.06)
2) multiply the z * std dev and add to the mean to find the "threshold"

only 6% of the population will have a value above this threshold number

Answer 7

I'm sorry, but what is the average in this equation? Or is it working in theoretical terms?

Answer 8

@phi

Answer 9

the mean