topic05b

topic05b - t-distribution is similar to z distribution with...

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Topic 5B Sampling Distribution 5.5 Sample Proportion v.s. Population proportion : 5.6 Distribution of sample proportion : Approximated by a normal distribution if 5.7 Distribution of difference between two sample proportion: Approximated by a normal distribution if 5.8 Distribution of sample mean when population variance is unknown follows “t” distribution with degree freedon= n-1,
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Unformatted text preview: t-distribution is similar to z distribution with fat tail. 5 p) n(1 5, np ≥ − ≥ p = p μ ± n ) (1 σ p p p − = 5 ) p (1 n 5, p n 5 ) p (1 n 5, p n 2 2 2 2 1 1 1 1 ≥ − ≥ ≥ − ≥ 2 1 p 2 1 μ p p p − = − ± ± 2 2 2 1 1 1 p n ) (1 n ) (1 2 1 p p p p p − + − = − ± ± σ ∑ = − − = − = n i i X X n S t 1 2 2 ) ( 1 1 , n S μ ) X (...
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