Review Test 2

# Review Test 2 - Test 2 Reviews 20 MC and Math Problems...

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Test 2 Reviews 20 MC and Math Problems T-test or Z-test Calculate Effect Size Chapters 7-12 How to select which type of test Hypotheses Null Hypothesis- no difference Research Hypothesis- there is a difference- may state directionality (correlation) -One-tailed vs. two-tailed Null- refers to the population (greek) mu of 1 equals mu of 2 Research- refers to sample (roman) xbar of 1 doesn’t equal xbar of 2 The conclusion is to either reject or fail to reject the null hypothesis Normality Also called bell-shaped (Gaussian) curve Represents a distribution of scores where the mean median and mode are equal to one another Symmetrical around the mean Asymptotic tails- the tails approach zero but never actually touch zero Area under the Curver 68% within 1 SD of the mean 27.2 in 2 nd SD or 95.4 with both 1 st and 2 nd 1.96 SD- 95% of cases Significance Statistical significance means that our differences have passed a threshold and we can

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Review Test 2 - Test 2 Reviews 20 MC and Math Problems...

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