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PSU
STAT 200 -
Unit_3_Ch_7-8
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Chapter 7z confidence interval for mean:t confidence interval for mean:Sample size for means:Confidence interval for a proportionSample size for a proportion:Confidence Interval for Variance and Standard DeviationChapter 8 Hypothesis Testingz test: for any value n. If n<30,population must be normally distributed.t test: (d.f. = n - 1)z test for proportions:Chi-square test for a single variance:¯x−zα2σ√n<μ<¯x+ zα2σ√n¯x−tα2s√n<μ <¯x+tα2s√nn=(zα2⋅σE)2^p−zα2√^p^qn< p<^p+zα2√^p^qnn=^p^q(zα2E)2^q=1− ^p^p=xn,√(n−1 )s2χR2<σ <√(n−1 )s2χL2(n−1 )s2χR2<σ2<( n−1) s2χL2z=¯x−μσ√nt=¯x −μs√nz=^p−p√pqnχ2=(n−1 )s2σ2(d.f. = n -
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