How to solve this problem in MATLAB?

Most graduate schools of business require applicants for admission to take the Graduate Management Admission Council’s GMAT examination. Scores on the GMAT are roughly normally distributed with a mean of 527 and a standard deviation of 112. What is the probability of an individual scoring above 500 on the GMAT?

Answer 1

[Alan Stevens]

The following calculates the normal cumulative distribution function for mean 0 and stadard deviation 1:

CDF = (1/2)*(1+erf(x/sqrt(2)));

Calculate your value of x as a number of standard deviations from the mean :

x = (500 - 527)/112;

then use this to find the corresponding value of CDF.

Since the question asks for the probability of being above this value, subtract the result from 1.