INFERETIAL STATS FORMULAS Flashcards
1
Q
Standard Score/ Standard Normal Dist.
A
z= value - mean/ standard deviation
2
Q
Formula for the minimum sample size needed for an interval estimate of population mean
A
n= ((za/2 • ó)/E)^2
3
Q
Z-test
A
z= sample mean - hypothesized population mean/ (population standard deviation/ square root of sample size)
4
Q
T test for a mean
A
t= Sample Mean-hypothesized population mean/ (sample standard deviation/ square root of n