Sample Size Calculator for Mean

Calculate the required sample size with MY ant Sample Size Calculator

Estimation of Mean
Test of One Sample Mean
Test of Two Independent Means
Test of >2 Independent Means
Test of Two Dependent Means
Test of >2 Dependent Means
Mean: Estimation

Mean: Estimation

Sample size calculation for estimation of mean

Obtain from previous study.
%
95% is the commonly used level of confidence. Researcher decide.
Also known as the precision of an estimate. Researcher decide.
%
Commonly between 10-20%. Researcher decide.

Sample Size Calculation

Option for FPC

Sample Size Calculation Applying Finite Population Correction

Reset the calculator
Mean: One Sample

Mean: One Sample

Sample size calculation for hypothesis testing of one sample mean

%
Commonly 5%. Researcher decide.
Commonly 2-tailed. Researcher decide.
%
Commonly 80%. Researcher decide.
Obtain from previous study.
Researcher decide.
%
Commonly between 10-20%. Researcher decide.

Sample Size Calculation

Reset the calculator
Mean: Two Independent Samples

Mean: Two Independent Samples

Sample size calculation for hypothesis testing of two independent samples mean

%
Commonly 5%. Researcher decide.
Commonly 2-tailed. Researcher decide.
%
Commonly 80%. Researcher decide.
Obtained from previous study.
Researcher decide.
%
Researcher decide.

Sample Size Calculation

Reset the calculator

Mean: >2 Independent Samples

Sample Size for Balanced Group ANOVA design using R

X is the values of group means. Modify the values of x and sd accordingly. Paste and run in code snippet below.

				
					x <- c(10,11,12,13)
sd <- 10
power <- 0.8
sig.level <- 0.05

sd.p <- function(x){sd(x)*sqrt((length(x)-1)/length(x))}
f <- sd.p(x)/sd

library(pwr)
pwr.anova.test(f=f,k=length(x),power=power,sig.level=sig.level)
Mean: Two Dependent (Paired) Samples

Mean: Two Dependent (Paired) Samples

Sample size calculation for hypothesis testing of two dependent (paired) sample mean

%
Commonly 5%. Researcher decide.
Commonly 2-tailed. Researcher decide.
%
Commonly 80%. Researcher decide.
Obtain from previous study.
Researcher decide.
%
Commonly between 10-20%. Researcher decide.

Sample Size Calculation

Reset the calculator