mean and standard deviation
Process Improvement and Median Changes
July 9, 2019Process Improvement: Find UCL and LCL for charts
July 9, 2019Given the following frequency distribution, find the mean, variance, and standard deviation.
class frequency
66-68 11
69-71 22
72-74 18
75-77 5
78-80 18
This solution shows how to calculate the mean and the variance from a frequency table.
