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PSU STAT 200 - Unit_3_Ch_7-8
School name Penn State University
Course Stat 200- Elementary Statistics
Pages 2

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Chapter 7 x z z confidence interval for mean t confidence interval for mean Sample size for means x t x z 2 n 2 n s s x t 2 n 2 n z 2 2 n E Confidence interval for a proportion p z 2 2 z Sample size for a proportion n p q 2 E p q p q p p z n n 2 x p n q 1 p Confidence Interval for Variance and Standard Deviation 2 2 n 1 s 2 n 1 s 2R 2L Chapter 8 Hypothesis Testing z test z x distributed n 2 2 n 1 s n 1 s 2R 2L for any value n If n 30 population must be normally x t t test s n d f n 1 p p z test for proportions z pq n 2 Chi square test for a single variance 2 n 1 s 2 d f n 1

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