1B stats: comparing two or more groups

Question 1

Independent variable: 1 group
Dependent variable: continuous and normally distributed (parametric)

Answer 1

One sample T-test

Question 2

Independent variable: 1 group
Dependent variabke: Continuous and skewed/ordinal (non-parametric)

Answer 2

sign test/ Wilcoxon signed rank test

Question 3

Independent variable: 1 group
Dependent variable: Binary ( 2 categories)

Answer 3

chi squared test/ exact test

Question 4

Independent variable: 1 group
Dependant variable: survival/ time to event

Answer 4

Life table analysis

Question 5

Independent variable: 2 groups (binary)
Dependent variable: continuous and normally distributed (parametric)

Answer 5

Two sample t-test (small sample, usually <60)
Z-test (large sample)
Linear regression

Question 6

Independent variable: 2 independent groups (binary)
Dependent variable: Continuous and skewed/ ordinal (non parametric)

Answer 6

Mann-witney U test
Wilcoxon ranked sum test

Question 7

Independent variable 2 independent groups (binary)
Dependent variable: Binary 2 categories

Answer 7

Difference between proportions: z test
Chi squared test (large sample)
Fisher exact test (small sample)
Logistic regression

Question 8

Independent variable: 2 independent groups (binary)
Dependent variable: Survival/ time to event

Answer 8

Log rank test
Cox regression

Question 9

Independent variable: Paired (related) sample (2 time points)
Dependent variable: continuous normally distributed (paratmetic)

Answer 9

Paired t-test (small sample)
Paired z test (large sample)
Bland Altman method

Question 10

Independent variable: Paired (related) sample (2 time points)
Dependent variable: Continuous and skewed/ ordinal (non-parametric)

Answer 10

Wilcoxon signed rank test

Question 11

Independent variable: Paired (related) sample (2 time points)
Dependent variable: binary (2 categories)

Answer 11

McNemar’s test
Kappa statistic

Question 12

Independent variable: >2 independent groups (unordered categorical)
Dependent variable: continuous and normally distributed (parametric)

Answer 12

One way ANOVA
Linear regression

Question 13

Independent variable: >2 independent groups (unordered categorical)
Dependent variable: continuous and skewed/ ordinal (non-parametric)

Answer 13

Kruskal- Wallis test

Question 14

Independent variable: >2 independent groups (unordered categorical)
Dependent variable: Binary (2 categories)

Answer 14

Chi squared test/ fishers exact test
Logistic regression

Question 15

Independent variable: >2 independent groups (unordered categorical)
Dependent variable: survival/ time to event

Answer 15

Log-rank test
Cox regression

Question 16

Independent variable: >2 related samples (>2 time points)
Dependent variable: continuous and normally distributed (parametric)

Answer 16

Repeated measures ANOVA

Question 17

Independent variable: >2 related samples (>2 time points)
Dependant variable: Continuous and skewed/ ordinal (non-parametric)

Answer 17

Friedman’s test

Question 18

Independent variable: continuous
Dependent variable: continuous and normally distributed (parametric)

Answer 18

Pearsons correlation
Linear regression

Question 19

Independent variable: continuous
Dependent variable: continuous and skewed/ ordinal (non parametric)

Answer 19

Spearman’s rank correlation
Linear regression

Question 20

Independent variable: continuous
Dependent variable: Binary (2 categories)

Answer 20

Logistic regression

Question 21

Independent variable: continuous
Dependent variable: time to event/ survival

Answer 21

cox regression