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STATISTICAL THINKING

by: Verdie Hauck PhD

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STATISTICAL THINKING STAT 208

Verdie Hauck PhD
Virginia Commonwealth University
GPA 3.55

Staff

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This 1 page Class Notes was uploaded by Verdie Hauck PhD on Wednesday October 28, 2015. The Class Notes belongs to STAT 208 at Virginia Commonwealth University taught by Staff in Fall. Since its upload, it has received 21 views. For similar materials see /class/230674/stat-208-virginia-commonwealth-university in Statistics at Virginia Commonwealth University.

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Date Created: 10/28/15
Chapter 22 Hypothesis testing on proportions Step 1 Write the null and alternative hypotheses Null Always contains an sign and CONTAINS THE VALUE FOR p The null states what is currently going on in the population Alternative Always contains an ltgt or at The alternative states what the researcher believes to be true Step 2 Determine p hat BASED ON THE STUDY Phat will be given as a decimal percent or out of statement Step 3 Plug p and p hat into the formula 10 p 100 p n Z Always use the value from the null to determine the standard deviation in the denominator THIS FORMULA FOLLOWS THE FAMILIAR FORM Z OBSERVED SCORE MEAN STD DEV Step 4 Look up the Z score on the chart to find the associated percentile remember this is already a percentdo not slide the decimal pointlllm Step 5 Find the P value If the alternative hypothesis in step 1 is a less than statement the percentile is the pValue If the alternative hypothesis in step 1 is a greater than statement you must subtract the percentile from 100 to get the pValue

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