Chapter 13 LearnSmart
In order to determine if there is a difference between the means of 3 or more populations, we use
analysis of variance
one way ANOVA test is better than using a series of two-sample tests because conducting a
series of two-sample tests inflates the risk of committing a Type 1 error
A one-way ANOVA test is based on the
Fdf1,df2 distribution
which method ensures that the probability of a Type 1 error equals alpha
Turkey;s HSD method
in order to determine if there is a difference between the means of 3 or more populations, we use
analysis of variance
The ____ is a weighted sum of the sample variances of each treatments
error sum of squares
In a two-way ANOVA test, the sum of squares Factor B is based on the sum of the squared differences between the mean for each level of factor B and the ____
grand mean
If the selection of one sample doesnt affect the selection of another, then the samples are considered
independent
The one-way analysis of variance(anova) test is used to determine if differences exist between the ____ of three or more populations
means
Performing a one-way ANOVA test, instead of performing a series of two-sample t tests, ____ the risk of incorrectly rejecting the null hypothesis
reduces
if the amount of variability between treatments is significantly greater than the amount of variability within treatments, then we
reject the null hypothesis of equal population means
one-way ABOVA analysis does not require that all mean differ from one another
true
In one-way Anova within treatments variability is based on the
variability within each sample
two independent estimates of the common population variation o^2, are estimated, these are called
between-treatments variability and within-treatments variability
In two-way ANOVA, if units within each block are randomly assigned to each of the treatments, then the design of the experiment is referred to as a
randomized block design