Psyc 2005 exam 3 written questions and answers graded a+.
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Module
PSYC 2005
Institution
PSYC 2005
structural model logic (vs the first method) - correct answer focuses directly on what contributes to the divisions of the deviations of scores from the grand mean
earlier method ANOVA - correct answer comparing a variance...
structural model logic (vs the first method) - correct answer focuses directly on
what contributes to the divisions of the deviations of scores from the grand mean
earlier method ANOVA - correct answer comparing a variance based on differences
among group means to a variance based on averaging variances of the group
what creates within groups variations - correct answer chance factors
between the means of samples- if the null is true - correct answer variations due to
chance factors if the null is true
between the means of samples- if the research is true - correct answer variations
due to chance factors and variations among the population means
why do we need the equal variance assumption - correct answer justify averaging
the estimates from each sample into an overall within-groups population
planned contrasts - correct answer predictions used to look at particularly focused
differences between groups directly from a theory and related directly to practical application
bonferroni procedure - correct answer problem with planned contrasts
.05 cutoff, more than 5% chance of getting significant result if null is true
post hoc comparisons - correct answer more exploratory approach
- comparing all pairings of means to see which differ / do not differ significantly
Scheffe test - correct answer more conservative, divide your F ratio by 2 (new
number of groups)
, effect size ANOVA - correct answer proportion of variance accounted for by
variation of means of groups
assumptions of ANOVA comparison dist - correct answer equal variance, normal
curve, independent scores
When RH hypothesis is true in ANOVA, - correct answer the F ratio is greater than
one (between groups is larger)
when null is true, variations come from - correct answer chance factors
statistical validity - correct answer accuracy of the p-value on which a statistical
decision is based
construct validity - correct answer degree to which the theory or theories behind
the research provide the best explanation for the results observed
external validity - correct answer the results generalize to the outside world
internal validity - correct answer confidence that only the manipulated variable
could have produced the results
maturation - correct answer changes in dependent variable due to normal
maturation
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