Analysis Prep

Minimum Sample Size

Common Confidence-z Values

(Assuming Normality)

Confidence

80%

90%

95%

98%

99%

z*-value

1.28

1.65

1.96

2.33

2.58

Minimum Sample Size

3.8

Slovins Sample Size

Common Alpha Values

Confidence

80%

90%

95%

98%

99%

a-value

0.20

0.10

0.05

0.02

0.01

Minimum Sample Size

285.7