sampling distribution of sample mean
The number of runs is a statistic with its own special sampling distribution and its own test.
Replacing usual sampling distribution with new one, more economic results can be obtained by less cost, and 84 gold-bearing structures have been found by 2 439 samples in Pingdu area.
This setting is used to find the location (or critical value) on the Chi Square sampling distribution that includes a tail area equal to the alpha-cutoff value (0.05).
