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The F ratio may be used to assess differences between (among): a. two sample means c. four sample means b. three sample means L d. all of these Analysis of experimental data by the F ratio means that the independent variable could have been manipulated: a. at only two levels c. at only three levels b. at two or more levels d. none of these With a two- group experimental design, the independent variable has been manipulated at: a. one level b. two levels c. three levels d. all of these For the F ratio, if alpha is set at .05, it remains at .05 if comparisons are made between (among): a. 2 group means b. 10 group means c. 45 group means d. all of these The alternative hypothesis for the F ratio is that the sample means: a. represent a single population 0. do not all represent a single population b. represent completely different populations d. none of these The SS, sum of squares, is equal to: a. the sum of the squared scores b. the sum of the scores, squared c. the sum of the squared deviations of all the scores from the mean d. the sum of the squared deviations of all the scores from the mean, divided by the degrees of freedom When the SS, sum of squares, is large, so too is the: a. standard deviation b. variance :3. both of these d. neither of these The concept of \"total variability\" is based on: a. how far the scores in all groups deviate from the total mean b. how far the sample means deviate from each other e. how far the scores in a single sample group deviate from their own group mean d. how far each sample mean deviates from the total mean