CONFIDENCE INTERVAL

# CONFIDENCE INTERVAL - 〉 30 1 2 2-= ≤ ≤-X X S Z X S Z...

This preview shows page 1. Sign up to view the full content.

A CONFIDENCE INTERVAL FOR THE MEAN OF A POPULATION 1) Population normal, standard deviation of the population known: [ ] )% 1 ( . . 2 / 2 / α σ μ - = + - X X Z X Z X P where n x = 2) Population not normal, standard deviation known, sample size large (n 30): [ ] )% 1 ( . . 2 / 2 / - = + - X X Z X Z X P where n x = 3) Population normal or not too skewed, standard deviation of the population unknown, sample size small (n≤30): [ ] )% 1 ( . . 2 / 2 / - = + - X X S t X S t X P where n S S x = 4) Population normal or not, standard deviation of population unknown, sample size large (n
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 〉 30): [ ] )% 1 ( . . 2 / 2 /-= + ≤ ≤-X X S Z X S Z X P where n S S x = CONFIDENCE INTERVAL FOR THE PROPORTION OF A POPULATION [ ] )% 1 ( . . 2 / 2 / π-= + ≤ ≤-p p Z p Z p P where n P P p ) 1 (-=...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online