Use z-scores and a z-table to determine your probability.
Formula:
z = (x - mean)/sd
Find both z-values:
z = (60 - 65.5)/2.5
z = (64 - 65.5)/2.5
Once you calculate both z-values, check a z-table for the probability between those two values.
I hope this will help.
the distribution of heights of American women aged 18 to 24 is approximately normally distributed with mean 65.5 inche and standard deviation 2.5 inches. what is the probability that a randomly seleted woman is between 60 and 64 inches tall?
1 answer