Transcription of Chapter 7: SAMPLING DISTRIBUTIONS & POINT …
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Chapter 7: SAMPLING DISTRIBUTIONS & POINT …
Chapter 7 SAMPLING DISTRIBUTIONS and POINT Estimation ofParametersPart 1: SAMPLING DISTRIBUTIONS ,the Central Limit Theorem, POINT Estimation & EstimatorsSections 7-1 to 7-21 / 26 Statistical InferencesA random sampleis collected on a populationto draw conclusions, ormake statistical inferences, about the (Random Sample)The random variablesX1,X2,..,Xnare arandom sampleof ) theXi s are independent2) everyXhas the same probability distributionTypes of statistical inference:1 Parameter estimation( estimating ) with a confidence intervalFor estimating , we collect data and we use the observed samplemean xas a POINT estimatefor and create a confidence interval toreport a likely range in which testingabout a population parameter ( : = 50)We wish to compare the mean time that women and men spend at : M= W?
Example of parameter estimation (or point estimation): We’re interested in the value of . We collected data and we use the observed x as a point estimate for .
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