chapter 9 one way anova Flashcards
We can use an ________ when we have more than two groups of participants or when participants experience more than_____ treatment ________.
ANOVA, 2 treatment conditions
A between groups ANOVA is an _______ test of probability that we can use with _______ independent variable having more than _____ levels.
A between groups ANOVA is an INFERENTIAL test of probability that we can use with ONE independent variable having more than TWO levels.
A __________ ________ ANOVA helps us determine if groups differ as a function of the _____ ____ ____. We conduct additional ______ tests to determine _______ the difference________.
A BETWEEN GROUPS ANOVA helps us determine if groups differ as a function of the LEVEL OF IV. We conduct additional STATISTICAL tests to determine WHERE the difference EXISTS.
We conduct Post hoc Analysis to ________specific ______________ when we have more than ____ groups..
We conduct POST HOC ANALYSIS to ISOLATE specific DIFFERENCES when we have more than TWO groups..
Which analysis of variance (ANOVA) is more sensitive to to detecting a statistically significant outcome? Why?
Repeated Measures ANOVA- because there is less error.
When we find a statistically significant outcome what other tests/measures should we perform?
Post Hoc and measure effect size.
Statistical significance of variance is determined by calculating a ______ of variance ______ treatments (treatment variance) to variance ________ treatments (error variance).
Statistical significance of variance is determined by calculating a RATIO of variance BETWEEN treatments (treatment variance) to variance WITHIN treatments (error variance).
When results of a statistical test are significant we conclude…
it is unlikely that the difference between the treatments occurred by chance.
Why not just use the t-test for comparisons of more than two groups? What kind of test reduces this problem.
Repeated use of the t-test can result in an increase in TYPE 1 error.
What is a type 1 error?
a statistically significant difference occurred by chance, rather than due to treatment of DV.
When we set alpha at .05 what are we saying?
We will not tolerate more than a 5% chance that variance is due to chance.
What type of ANOVA has one independent variable with multiple levels or conditions?
A One Way ANOVA
ANOVA is a family of statistical tests that compares ______ _______ to asses whether ________ across _____ are reliable.
ANOVA is a family of statistical tests that compares GROUP MEANS to asses whether DIFFERENCES across MEANS are reliable.
________ _______ ANOVA: an ANOVA in which a single individual does not provide data for more than one _____ or ______.
BETWEEN GROUPS ANOVA: an ANOVA in which a single individual does not provide data for more than one CONDITION or GROUP.
ANOVA = what/what
ANOVA = Treatment variance/error variance
When calculating ANOVA, if the calculated ratio is large, then the treatment effect is ______ compared to ______ ________ __________. IF this is the case we can conclude that treatment LIKELY made a difference and that these is a statistically significant outcome.
When calculating ANOVA, if the calculated ratio is large, then the treatment effect is LARGE compared to MEASUREMENT ERROR. IF this is the case we can conclude that treatment LIKELY made a difference and that these is a statistically significant outcome.
The F statistic is named in honour of ________ who advanced the use of ANOVA by suggesting probability is at the heart of good inferential statistics
Fisher