Paired and Independent T-Test Test of Means and Medians

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16 Terms

1
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Paired T-test aka 2 independent samples

compares the averages of two measurements for same sample that are dependent on each other

2
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Paired T-test uses

2 quantitative post and pre variables that the difference is normally distributed

3
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Wilcoxon Signed-rank test uses

2 qualitative post and pre variables that the difference is not normally distributed

4
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Reporting Wilcoxon Signed Rank

test value pre median post median p-value

5
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Two Independent Samples T-test

compare means between two seperate groups

6
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Two Independent Samples T-test null

there is no significant difference between the means of two groups

7
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Two independent Samples T-test uses

1 quantitative and 1 qualitative variable with 2 categories normally distributed based on levene’s test

8
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Levene’s test

variance in the quantitative variable in two groups are equal

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Levene’s test not significant

p ≥ 0.05 or CI includes null value

use top row and assumes equal variances

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Levene’s test significant

p ≤ 0.05 or CI excludes null value

use bottom row and variances not equal

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If CI overlap

FTR null or not significant result

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If CI separate

reject null or significant result

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Mann-Whitney Test uses

1 quantitative 1 qualitative variable abnormally distributed

14
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Mann-Whitney test

tests if two groups differ from each other based on medians

15
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Mann-Whitney test null

the medians of two groups are the same or not significantly different

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Reporting Mann-whitney

test value median (min-max) median (min-max) p-value