Which critical value is appropriate for a 99% confidence level where n = 17; a is unknown and the
population appears to be normally distributed?
Ata/2 = 2.898
BZa/2 = 2.567
CZa/2 = 2.583
Dta/2 = 2.921
population appears to be normally distributed?
Ata/2 = 2.898
BZa/2 = 2.567
CZa/2 = 2.583
Dta/2 = 2.921