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15 Cards in this Set

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  • Back
  • 3rd side (hint)
Alpha (level of significance)
Refers to the the probabilty of rejecting the null hypo when it is true.
Value set by experimenter prior to collecting data.
set at .01 or .05
Prob of making a Typoe I error
Ancova (anaysis of covariance)
version fo the Anova used to increase the efficiency of the analysis by statistically removing variability in the DV, due to extraneous variable.
occurs when performance of post-test correlates w/ performance of pretest.
Between-Groups design
Studies in which the effects of the different levels of one or more IV are compared by administering each level or combination of levels to a different group of participants.
Central limit theorem
Devrived probability theor. sampling size of mean will approach a normal shape as sample size increases.
Mean equals
Inflates value fo t or F threfore resulting in increase prob of Type I error
Central limit theorem
mean equl to popluation mean
Central limit theorem
standard deviation equal to pop SD divided by sq root of the sample size
Chi-square tests
single sample
Inferential stat test on a nominal scale. one variable
Chi-square tests
multiple sample
Inferential stat test on a nominal scale. two or more variables
Cluster sample
units or groups of individuals from population
Correlation Coefficient
numerical index of degree of association of 2 or > V's.
magnitiude = strength of relat
-+ indicates direction
Pearson r
both V's represent a continuous scale
point biserial
one V is a true dichotomy and the other is continuous
one V is an artifical dichotomy and other is continuous.