Equation To Find Sample Size. Use the sample size formula. Necessary sample size Z-score2 standard deviation 1 - standard deviation margin of error2.
If we are using three independent variables then a clear rule would be to have a minimum sample size of 30. 603 respondents are needed and that becomes your sample size. Necessary sample size Z-score2 standard deviation 1 - standard deviation margin of error2.
If the population is N then the corrected sample size should be 186N N185.
Necessary sample size Z-score2 standard deviation 1 - standard deviation margin of error2. A 95 confidence level andP5are assumed for Equation 5. Educational and Psychological Measurement 73 6 913-934. Then cancel out the square root of n from the numerator and denominator on the right side of the equation since any number divided by itself is equal to 1.
