Flashcards
three
Cards in this deck (21)
- 1what is an anovaanalysis of variance
- 2what is variancemeasure of spread of dispersion of your data
- 3what is the formula for variance(standard deviation) squared
- 4a data set can be described by what 2 thingsa typical value (measure of central tendency), how spread out it is (dispersion)
- 5what does an anova compare?within-group error variance (in each experimental group),, between-group variance,, if variance within is similar to variance between
- 6where do individual differences in variance come fromerror (different people)
but more: effect ofv ariable (diff conditions) - 7what is the f ratio doingratio of the two variances. tests likelihood of 2 variance estimates being from same population
- 8what is the f ratio formulaf = between groups variance / within groups variance
- 9what does a significant anova tell us?somewhere in analysis, at least one group is different from at least one other group
- 103 types of follow up analysis?planned comparisons (a priori) (decide what differences we want to look for),, post hoc (check if they are any diff), problems with multiple comparisons (familywise error rate)
- 11type 1 error issaying there IS a diff when there isnt,, chance of making this error is equal to p value
- 12type 2 error issay there is NO diff when there is. only error in chance to provide evidence for hypothesis is missed
- 13if you do an anova, what does this have to do with type 1 errorsmore groups there are, higher chance (5% more every condition) with each condition to make the error.
- 14what is the familywise errorchanging the p value (bc otherwise you would have to times each condition by .05) so you divide 0.5 by the number of comparisons which then shows the new cut off.
called bonferroni correction - 15what is the new cut off in the familywise error calledbonferroni correction
- 16two types of post hoc tests?tukey
student-newman-keuls - 17what is the kruskal-wallis testnon-parametric independent one way anova, compares 3 or more groups, similar to mann-whitney and uses ranked data, using separate group of participants for every treatment
- 18what is the name of the test that is non-parametric independent one way anova, compares 3 or more groups, similar to mann-whitney and uses ranked data, using separate group of participants for every treatmentkruskal-wallis
- 19how does the kruskal-wallis test workranks all scores across groups, if real differnce then ranks for 1 condition will be systematically higher or lower than another, if no difference then ranks for each sample will be mingled together
- 20what is friedmans testnon para repeated measures one-way anova, compares 3+ related conditions, similar to wilcoxon, used ranked diffs, using same group of ppl
- 21what is the test that is non para repeated measures one-way anova, compares 3+ related conditions, similar to wilcoxon, used ranked diffs, using same group of pplfriedmans test
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- PSYCHOLOGY YEAR 2 (1 rmc) Flashcards on three, created by Ki Rai on 25/11/2018.
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- Ki Rai
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