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Anova is appropriate for what types of
research situations?
for situations involving three or more samples and a variable measured at the interval/ratio level of measurement TERM 2
what are some ways to think about the
purpose of ANOVA? What does it measure?
DEFINITION 2 It measures whether there's more variation between groups than within groups. it examines the legitimacy of a classification theme. TERM 3
what is the F ratio and what does it reflect?
DEFINITION 3 the f ratio is the test statistic calculated for ANOVA. It is the ratio of the variation between the samples to the variation within samples TERM 4
what two types of means come into play in
ANOVA?`
DEFINITION 4 The grand mean and the individual sample means TERM 5
What is between-groups variation and what is
within-group variation?
DEFINITION 5 Between-groups variation is an expression of the amount of deviation of sample means from the grand mean. Within- groups variation is an expression of the amount of deviation of sample scores from sample means.
what is the symbol for the within-groups sum
of squares, and how is it calculated?
the symbol is SSw. It is calculated by finding the deviation of each score in a sample from the sample mean, squaring the deviations, adding the squared deviations for each sample, and summing across all the samples. TERM 7
what is the symbol for between-group sums
and how is it calculated?
DEFINITION 7 symbol is SSb. it is calculated by finding the deviation of each sample mean from the grand mean, squaring the deviation for each sample and summing across all the samples TERM 8
what do the mean square between and the
mean square within represent?
DEFINITION 8 the mean square between is the estimate of the between- groups variance. the mean square within is the estimate of the within-groups variance TERM 9
how many degrees of freedom are associated
with the between-groups estimate of
variance?
DEFINITION 9 the number of degrees of freedom for MSb is k-1, where k is the number of categories or samples in the study TERM 10
how is the between-groups estimate of
variance obtained?
DEFINITION 10 the between-groups estimate of variance is obtained by dividing the between-groups sum of squares by the between- groups degrees of freedom
