Page 234 - Quantitative Data Analysis

Quantitative Data Analysis
Simply Explained Using SPSS

 90% Confidence Interval for : ̅ (for
√
one sample Z-test)

 95% Confidence Interval for : ̅ (for
√
one sample Z-test)

 99% Confidence Interval for : ̅ (for
√
one sample Z-test)

10.

̅
√


̅
√


̅
√

̅−
11.
√
where ̅ = sample mean (given or can be calculated)
= population mean (given)
= population standard deviation (given)
= sample size

̅−
12.
√
where ̅ = sample mean (given or can be calculated)
= population mean (given)
= sample standard deviation (given or can be calculated)
= sample size
Note:

The Theory and Applications of Statistical Inferences 218