Ubc Sample Size Calculator. Calculation based on the formula. Comparing a Mean to a Known Value.
79 shows that in the second sample you need to take additional measurements to make a total sample size of. Enter a value for sigma. N a Z α2 2 log 2 1-RP 1X 1Y where.
If each sample size is 10 and the standard deviation is 30 as in the default what do you predict the standard deviation of the sample means to be.
Power and Sample Size Programs. Increasing the relative precision to 90 reduces the sample size to 14 in each group whilst decreasing the prevalance for customers over 25 to 1 increases the sample size to 637 per group. Power and Sample Size Programs. Sample Size Calculator for Comparing Paired Differences.
