Asked by tamara
if x is a normally distributed random variable with amean of 8.00 if the proability for x is less than 9.54 is 0.67, then find the standard deviation of x
Answers
Answered by
PsyDAG
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.67) and insert its Z score in the equation above to solve for SD.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.67) and insert its Z score in the equation above to solve for SD.