FINAL EXAM TIP 1 - Otherwise all groups appear to have the same means On the Final Exam just look for the probability level and see if it is less

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FINAL EXAM TIP 1 – COMPARISON OF MEANS Here’s what you have to know about statistical testing to do well on the Final Exam: [1] If the dependent variable is continuous, use ANOVA (analysis of variance). In marketing research, continuous usually includes ordinal scales and all types of rating scales (1=low to 5=high). Any scale that produces an ordering is sufficiently continuous and so ANOVA is used. [2] If the dependent variable is NOT continuous (nominal or categorical), use a CHI-SQUARE test. In SPSS, you would run a cross tabulation table and then ask for the chi-square statistic. [3] Group differences exist when the probability level of the statistical test is less than .05.
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Unformatted text preview: Otherwise, all groups appear to have the same means. On the Final Exam, just look for the probability level and see if it is less than .05. If so, then you have something interesting to say: group means are different. You don’t have to know the following: • Between Group Sum of Squares • Within Group Sum of Squares • F-Test • Intercept Model • Model of the Means • Sum of Squared Errors • Formula used to compute the Pearson Chi-Squared Test Because 6M134 is NOT a statistics class, you don’t have to memorize formulae. However, you are expected to know WHEN a test is the appropriate technique and WHAT the probability level of the test means....
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This note was uploaded on 09/15/2011 for the course 06M 134 taught by Professor Staff during the Spring '10 term at University of Iowa.

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