CONFIDENCE INTERVAL

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

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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
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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 (-=...
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This note was uploaded on 12/30/2010 for the course BUSS 202 taught by Professor Ritageutchian during the Three '10 term at Notre Dame AU.

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