to visit the calculator or click the Calculator Folder Tab above
If you have a problem with a sample distribution with a given mean and standard
deviation, and sample size, use this calculator. This calculates the
sampling distribution of the mean using a Standard Normal Distribution.
The formula is denoted below
This calculator solves for P(x < a), P(x >a), or P(z < x < b). For
problems like P(z < x < b), enter the 2 X
values with a comma separator, i.e., 250,300.
EXAMPLE: A casino is set to pay out in the form of a random variable with a mean of 200
tokens and a standard deviation of 15 tokens. What is the probability that
the average (mean) amount of tokens dispensed in a random sample size of 36
casino players is at least 204 tokens?
Enter 204 for X, 200 for mu(mean), 15 for standard deviation, and 36 for n.
Press P(Z >= z). Your answer is 0.0548.