Find Sample Size From Mean And Standard Deviation. The following is the sample standard deviation formula. So the formula in order to determine the sample size is n z σMOE 2.
The mean of the sample mean X. The mean and standard deviation of the population 152 156 160 164 in the example are μ 158 and σ 20. Mar 14 2018 Next find out the standard deviation for the population parameter youre trying to estimate with your survey.
In this formula z is the z value obtained from the Z distribution table.
I wonder if I can back calculate standard deviation from mean sample size and confidence interval. Milky Milk is sold in packets with an advertised mean weight of 05kgs. This equation is for an unknown population size or a very large population size. I and III For nos.
