Z = (x - μ)/SD
You have values for μ and SD, but need to determine Z to find x. Look in the back of your stat text for a table labeled something like "areas under the normal distribution" with the proportions (.10, ±.375 and .05 respectively) to find the corresponding Z scores to solve for x in the above equation.
I hope this helps. Thanks for asking.
The height of adult women in the U.S. is normally distributed, with a mean height of 64 inches and a standard deviation of 3 inches. With this in mind, answer the following:
a) The shortest 10% of women are shorter than what height?
b) The middle 75% of all women are between what two heights?
c) The tallest 5% of women are taller than what height?
I'm so confused. Please help.
1 answer
1 answer