Discussion (WK7)

Discussion (WK7) - hypothesis test for the difference in...

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Discussion (WK7) Question 1: When a researcher has two samples with two means, one of the assumptions for two samples is independence of between the two samples. What does this mean? What happens if the independence assumption is violated? When a researcher has two samples with two means, it represents two different sets of data which are considered to be independent of each other and they can be tested based on two tail ANOVA tests. If the independence assumption is violated, then it leads to inability of statistical testing and analysis. Reference: th Ed. McGraw-Hill Irwin. 2011: CH11, Pg 321-325. Question 2: What are the differences among a proportion, a percentage, and a ratio? When would a researcher use a
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Unformatted text preview: hypothesis test for the difference in two population proportions? Explain. Proportion refers to the relation between elements as a whole and the whole portion. It is nothing but a fraction element. Percentage refers to the expression of a number as a fraction of 100. Ratio is the mathematical relationship between two numbers of the same kind. A researcher would use a hypothesis test when he wishes to verify the association between the two population proportions in terms of correlation, regression or any other such parameter. It would be used to analyze the characteristics common to the sample with that of the whole population. Reference: Lind, Marchal, Wathen. Basic Statistics for Business & Economics, 7 th Ed. McGraw-Hill Irwin. 2011: CH09&10, Pages 270, 288, & 309....
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