How to compare 2 DIFFERENT sample groups with SAME measure relation to nature of dependent variable (3)

1, Nominal >> χ2 Test 2, Ordinal >> Mann-Whitney U Test 3, Continues >> Independent T-Test

How to compare more than 2 DIFFERENT sample groups with SAME measure in relation to nature of dependent variable (3)

1, Nominal >> χ2 Test 2, Ordinal >> Kruskal-Wallis One-Way ANOVA 3, Continues >> One-Way ANOVA

What is independent and dependent variable

independent variable = grouping /cause /predictor dependent variable = outcome / what we measure

What is number of degree of freedom when executing χ2 Test

d.f. = (Nr. of Rows - 1) * (Nr. of Columns -1)

What is row and column

. . . . . . . row . . . . . . column

What does statistical significance and not significance in terms of χ2 Test

χ2 significant = variables are dependent χ2 not significant = variables are not dependent

What are 3 assumptions for a χ2 test

1, observation are independent 2, categories are mutually exclusive (observation cannot be multiple categories or overlapping) 3, in each table there should be at least 5 observation (in a lot of table max 20% of boxes under 5)

How can after χ2 test relationship be measured (2)

1, 2x2 Tables >> Phi (φ) 2, Larger >> Cramer´s V

How is the level of relationship in Phi (φ) and Cramers V measured

0 >> no relationship 1 >> perfekt relationship

What is "rule of thumb" in relationship measurement for χ2 test (3)

1, odds ratio 2. odds ratio = Odds option x "yes vs no" / Odds option y "yes vs no" 3, interpretation >> something is xmore likely that y

What does SPSS in χ2 in default (2)

1, if minimum expected values in cells is violated (<5 or small sample size) it uses Exact Fisher Test 2, otherwise Pearson χ2 test

What are 3 assumption for independent sample t-test

1, Independent observation 2, Normal Distribution ( K-S test for Skewness-Kurtosis) 3,Homogeneity of variance (across samples)

What is process doing independent sample t-test (3)

Step 1 - Check assumption Step 2 - calculate t-test (significant or not) Step 3 - calculate effect size

What are hypothesis in independent sample t-test

H0 = Groups do not differ H1 = Groups differ

What is standart error of difference in independent sample t-test (2)

1, SE= sp √ (1/n1 + 1/n2) 2, sp² = (n1-1)s1² * (n2-1)s2² / (n1+n2-2 )

What is the independent sample t-test formula

t= (x̄1 - x̄2) / sp√ (1/n1 + 1/n2)

How to calculate Cohens d for independent sample t-test

d= x̄1 - x̄2/√ (s1²+s2²)/2

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PDAM #4

Question	Answer
How to compare 2 DIFFERENT sample groups with SAME measure relation to nature of dependent variable (3)	1, Nominal >> χ2 Test 2, Ordinal >> Mann-Whitney U Test 3, Continues >> Independent T-Test
How to compare more than 2 DIFFERENT sample groups with SAME measure in relation to nature of dependent variable (3)	1, Nominal >> χ2 Test 2, Ordinal >> Kruskal-Wallis One-Way ANOVA 3, Continues >> One-Way ANOVA
What is independent and dependent variable	independent variable = grouping /cause /predictor dependent variable = outcome / what we measure
What is number of degree of freedom when executing χ2 Test	d.f. = (Nr. of Rows - 1) * (Nr. of Columns -1)
What is row and column	. . . . . . . row . . . . . . column
What is formula of χ2 Test	χ2= ∑ (O-E)²/ E
What does statistical significance and not significance in terms of χ2 Test	χ2 significant = variables are dependent χ2 not significant = variables are not dependent
What are 3 assumptions for a χ2 test	1, observation are independent 2, categories are mutually exclusive (observation cannot be multiple categories or overlapping) 3, in each table there should be at least 5 observation (in a lot of table max 20% of boxes under 5)
How can after χ2 test relationship be measured (2)	1, 2x2 Tables >> Phi (φ) 2, Larger >> Cramer´s V
How is the level of relationship in Phi (φ) and Cramers V measured	0 >> no relationship 1 >> perfekt relationship
What is "rule of thumb" in relationship measurement for χ2 test (3)	1, odds ratio 2. odds ratio = Odds option x "yes vs no" / Odds option y "yes vs no" 3, interpretation >> something is xmore likely that y
What does SPSS in χ2 in default (2)	1, if minimum expected values in cells is violated (<5 or small sample size) it uses Exact Fisher Test 2, otherwise Pearson χ2 test
What are 3 assumption for independent sample t-test	1, Independent observation 2, Normal Distribution ( K-S test for Skewness-Kurtosis) 3,Homogeneity of variance (across samples)
What is process doing independent sample t-test (3)	Step 1 - Check assumption Step 2 - calculate t-test (significant or not) Step 3 - calculate effect size
What are hypothesis in independent sample t-test	H0 = Groups do not differ H1 = Groups differ
What is standart error of difference in independent sample t-test (2)	1, SE= sp √ (1/n1 + 1/n2) 2, sp² = (n1-1)s1² * (n2-1)s2² / (n1+n2-2 )
What is the independent sample t-test formula	t= (x̄1 - x̄2) / sp√ (1/n1 + 1/n2)
How to calculate Pearson r for independent sample t-test	r = √ t²/(t²+df)
How to calculate Cohens d for independent sample t-test	d= x̄1 - x̄2/√ (s1²+s2²)/2

Created by: semester1.IBWL

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