tutorial05-F09y

tutorial05-F09y - ISMT 111 BUSINESS STATISTICS TUTORIAL 5...

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1 ISMT 111 B USINESS S TATISTICS T UTORIAL 5 created by Andrew Yam Sampling Distribution of Sample Statistics The sampling distribution of a statistic is the probability distribution of all the possible values of this statistic which are computed from random samples with same sample size ( n ). Notation: n = Sample size X = Random variable µ = Population mean X = Sample mean σ = Population standard deviation s = Sample standard deviation se = Standard error p = Population proportion p ˆ = Sample proportion Central Limit Theorem (CLT) Regardless of the population distribution of X which is with a mean µ and a standard deviation σ , if the sample size n is sufficiently large, the sampling distribution of the sample mean X will be APPROXIMATELY normally distributed with mean m m = X and
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This note was uploaded on 12/30/2009 for the course ISOM ISOM111 taught by Professor Anthonychan during the Spring '09 term at HKUST.

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tutorial05-F09y - ISMT 111 BUSINESS STATISTICS TUTORIAL 5...

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