F-Test and ANOVA Flashcards
1
Q
comparison of 2 variances or standard deviations
A
F-Test
2
Q
Characteristic of the F-Distribution (4)
A
- values of f cannot be negative
- distribution is positively skewed
- mean value of f is approximately 1
- f distribution is a family of curves
3
Q
if two tailed…
A
alpha/2
4
Q
Assumptions for testing the difference between 2 variances (3)
A
- Random Sample
- Population must be normally distributed
- Samples must be independent to one another
5
Q
Technique that uses an f-test to test a hypothesis concerning the means of 3 or more populations
A
Analysis of Variance
6
Q
Assumptions for comparing 3 or more means (3)
A
- Populations which samples were obtained must be normally distributed
- Samples must be independent to each other
- Variances of populations must be equal
7
Q
Analysis of Variance that is used to compare 3 or more means that contains only one variable
A
One way analysis of variance
8
Q
Involves finding the variance of the means
A
Between-Group Variance
9
Q
Made by computing the variance using all the data and is not affected by the differences in the means
A
Within-Group Variance
10
Q
Alternative Hypothesis in ANOVA
A
At least one mean is different from the others
