Basically, this conversion forces the mean and stddev to be standardized to 0 and 1 respectively, which enables a standard defined set of Z-values (from the Normal Distribution Table) to be used ...

Finding the mean from a table When data is presented as a list, as in the example below, to find the mean you add up the number of pets owned and divide that by the total number of people asked.

Learn about calculating the mean, mode and range from a frequency table with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

By default, the IRCHART statement estimates the process mean and standard deviation ()from the data, as in the previous example.However, there are applications in which known (standard) values and are ...