Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.30 from mean) and get the Z scores.
Insert Z scores into equation below.
Z = (score-mean)/SD
A particular normal distribution has mean of 575 and standard deviation of 150.
What X values form the boundaries for the middle 60% of the data? Round answers to two decimal places.
Lower boundary: Blank 1
Upper Boundary: Blank 2
2 answers
12
0 answers