The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a student scores more than 400 on th
Mathematics
bcardoso07
Question
The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a student scores more than 400 on the standardized test?
1 Answer

1. User Answers casltiel2
Z = (scoremean)/SD
Calculate Z and find its proportion in table in the back of your stats book labeled "areas under normal distribution". Convert proportion to number of students.