# One sample test for means

- Compute sample size
- Compute power

Significance level (α):

Desired power (1- β):

Two-sided or one-sided test

Expected mean of the sample:

Expected standard deviation of the sample :

Mean of the reference group:

Significance level (α):

Sample size:

Two-sided or one-sided test

Expected mean of the sample:

Expected standard deviation for the sample :

Mean of the reference group:

# Paired test for means

- Compute sample size
- Compute power

Significance level (α):

Desired power (1- β):

Two-sided or one-sided test

Expected mean of the difference (after - before):

Expected standard deviation of the difference :

Null hypothesis for mean of the difference:

Significance level (α):

Sample size:

Two-sided or one-sided test

Expected mean of the difference (after - before):

Expected standard deviation for the difference :

Null hypothesis for mean of the difference:

# Comparing two-sample means

- Compute sample size
- Compute power

Significance level (α):

Desired power (1- β):

Two-sided or one-sided test

Expected mean for the intervention group:

Expected standard deviation of the mean for the intervention group :

Expected mean for the control group:

Expected standard deviation of the mean for the control group :

Significance level (α):

Sample size per group:

Two-sided or one-sided test

Expected mean of the intervention group:

Expected standard deviation for the mean of the intervention group :

Expected mean of the control group:

Expected standard deviation for the mean of the control group :