Test Assumptions

Question 1

X^2 Goodness of Fit Test

Answer 1

Data are a random sample
No category has an expected frequency lower than 1
No more than 20% of categories have an expected frequency lower than 5

Question 2

X^2 Contingency Test

Answer 2

Data are a random sample
No category has an expected frequency lower than 1
No more than 20% of categories have an expected frequency lower than 5

Question 3

One-sample t-test

Answer 3

Data are a random sample

Variable is normally distributed in the population

Question 4

Paired t-test

Answer 4

Pairs are from a random sample

Paired differences are normally distributed in the population

Question 5

Two-sample t-test

Answer 5

Both samples are random from the population
Variables are normally distributed
The standard deviation of 2 groups is equal

Question 6

ANOVA

Answer 6

Random samples from populations
Variable is normally distributed in each k population
Variance is equal in all k populations

Question 7

Tukey-Kramer Test

Answer 7

Random samples
Response variables are normally distributed in each group
Variances equal among all groups

Question 8

Pearsons correlation

Answer 8

X and Y are normal
XY relationship is linear
X and Y are random

Question 9

Linear Regression

Answer 9

Linear relationship
Normality and equal variance of X and Y
Y values are a random sample from the population of possible Y values