Exam 3 - ANOVA

Question 0

ANOVA F test

Answer 0

Tests the null hypothesis that all the populations being compared have the same mean

Question 1

Analysis of variance

Answer 1

Compares the variation due to specific sources with variation among individuals who should be similar. The test whether several populations have the same mean by comparing how far apart the sample means are against how much variation there is w/in the samples

Question 2

Conditions for ANOVA

Answer 2

Independent SRS from each population; that each population has Normal distribution; and that all populations have the same standard deviation

Question 3

Mean squares

Answer 3

The measure of variation in the numerator and denominator of F

Question 4

One-way analysis of variance (ANOVA)

Answer 4

The simplest form of ANOVA , this compares the means of several populations

Question 5

Test statistic for Analysis of Variance is F=

Answer 5

Observed variation in the sample means / over expected variation in the sample means population means are equal

Question 6

Observed variation

Answer 6

Variation among sample means

Question 7

Expected variation

Answer 7

Variation among individuals within samples

Question 8

ANOVA us robust but check for normality, a.e.

Answer 8

Outliers and skewness

Question 9

Unequal variance- ANOVA is robust if

Answer 9

The sample sizes are equal and no sample is very small
Check
Largest s/ smallest s< 2

Question 10

Lack of random allocation or independent SRSs - ANOVA is NoT robust

Answer 10

Poorly collected data