WK 6 - Usability & Cognition

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T-tests are parametric. What does that mean?
The data should meet certain assumptions
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Mann-Whitney and Wilcoxon are examples of what type of test?
Non-parametric
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What type of t-test would you use to compare the mean of a single sample to a comparison or test value?
One-sample t-test
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What type of t-test would you use to compare mean scores from two conditions within the same participants/matched sets of participants?
Two-sample (paired sample) t-test
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What type of t-test would you use to to compare mean scores of two groups?
Two-sample (independent sample) t-test
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What type of hypothesis would we use with t-tests?
Both one-tailed & two-tailed
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A two-sample (paired sample) t-test can be used to compare two different conditions when you have what type of experimental design?
Repeated measures and matched pairs design
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Lizzie tells Donald that provided the assumption is met, that the paired sample t-test is more powerful than the wilcoxon test on the same data. Is that true or false?
True
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What is the most appropriate descriptive statistic to use with parametric tests?
Mean
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A group of overweight women try two exercise programmes: X and Y. Half the women try X for 1 month and then Y for 1 month, The other half try Y first then X. What type of experimental design is this?
Repeated measures
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How do I compare scores in two conditions when the data is unusual/violates assumptions?
Mann-Whitney & Wilcoxon
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Which test is used to compare scores in more than two related samples when the resulting data is unusual/violates assumptions?
Friedman's ANOVA
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Which test is used to compare scores in two related samples when the resulting data is unusual/violates assumptions?
Wilcoxon test
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Which test is used to compare scores in two independent samples when the resulting data is unusual/violates assumptions?
Mann-Whitney test
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When conducting an independent samples t-test, if the value is less than 0.05 what does this mean?
The means of the two groups are significantly different
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What is the definition of degrees of freedom?
It represents how many values involved in a calculation have the freedom to vary
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What does heterogeneity of variance mean?
The variances are NOT equal in the two groups
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Other cards in this set

Card 2

Front

Mann-Whitney and Wilcoxon are examples of what type of test?

Back

Non-parametric

Card 3

Front

What type of t-test would you use to compare the mean of a single sample to a comparison or test value?

Back

Preview of the front of card 3

Card 4

Front

What type of t-test would you use to compare mean scores from two conditions within the same participants/matched sets of participants?

Back

Preview of the front of card 4

Card 5

Front

What type of t-test would you use to to compare mean scores of two groups?

Back

Preview of the front of card 5
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