parametric test Flashcards
what does parametric test assume?
1
) normal distribution
2
) All groups have the same variances
3) data was from independent groups
what does parametric test require?
mean and standard deviation
what does parametric test infer about?
parameters of distribution
what is the 2 assumption for ANCOVA? about DV and coVARIATE
1) relationship between DV and covariate should be linear
2) Relationship between DV and covariate should be the same for all groups.
- it should not be significant, regression should be parallel
what is the characteristics of parametric data?
- assume normal distribution
- data has to be on an interval/ ratio scale
- need to compute mean and standard deviation.
what is the degree of freedom?
n-1
assumption checks for all parametric test, what do u need to check?
check for normality- normal distribution
check for equal variances
what are the 3 assumptions of ANOVA?
- normal distribution
- same variances
- data was from independent groups.
what is the parametric test of 1 sample group?
simple t test
what is the parametric test of 2 dependent groups?
paired sample t test
what is the parametric test of 2 independent groups?
Independent t test
what is the parametric test of 2 or more independent groups?
One way ANOVA
what is the parametric test of 2 or more dependent groups?
ANOVA
what is the non parametric test of 1 sample group?
Wilcoxon rank test
what is the non parametric test of 2 dependent groups?
Wilcoxon rank test
what is the non parametric test of 2 independent groups?
Mann Whitney U test
what is the nonparametric test of 2 or more dependent groups?
Friedman test
what is the non parametric test of 2 or more independent groups?
Kruskal Wallis
How do i check for normality for parametric test?
shapiro wilk test.
Q-Q plot test
How do i check for equal variances for parametric test?
levene’s test
what test should i use to test whether the means of 2 groups are significantly different
assuming variances are equal?
Student t test
what test should i use to test whether the means of 2 groups are significantly different
assuming variances are unequal?
Welch’s test
what does low p value for assumption check indicate?
violation of assumption of normality
what is ancova? what does it measure?
evaluates whether population means of a continuous variable are equal across categorical variables
while
controlling continuous variables that are not of primary concern.
