Table 1 Determining sample size (Kutner et al. 2004)

Power 1-β = .90

\(\frac{\Delta }{\delta }=1.0\)

\(\frac{\Delta }{\delta }=1.25\)

\(\frac{\Delta }{\delta }=1.5\)

\(\frac{\Delta }{\delta }=1.75\)

\(\frac{\Delta }{\delta }=2.0\)

\(\frac{\Delta }{\delta }=2.5\)

\(\frac{\Delta }{\delta }=3\)

α

α

α

α

α

α

α

r

.2

.1

.05

.01

.2

.1

.05

. 01

.2

.1

.05

.01

.2

.1

.05

.01

.2

.1

.05

.01

.2

.1

.05

. 01

.2

.1

.05

. 01