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Unformatted text preview: . The confidence level is 1α . (e.g.15%=95%) 1.961.96 f(z) Statistical Inference for the Mean onfidence Interval Confidence interval of sample means : x x μ − − σ Confidence Interval n z x / = = n z x μ+ = g 5% level of significance in two tails i e 95% confidence level e.g. 5% level of significance in two tails, i.e. 95% confidence level. Φ (<z1)=0.025 96 Φ (>z1)=0.025 +1 96 f(z) z1=1.96 x 96 . 1 − = z1=+1.96 x 96 . 1 + = z =1.96 z =1.96 2.5% 2.5% n Then the 95% confidence interval is n 1 1 n from 96 . 1 − n to 96 . 1 +...
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This note was uploaded on 02/13/2012 for the course MATH 2320 taught by Professor Glyn during the Fall '11 term at Minnesota.
 Fall '11
 Glyn
 Math, Normal Distribution

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