8) The best way to reduce the variances in the distributions of means when conducting an independent-samples t test is toA) increase the size of the samples.B) raise the study’s level of significance.C) use the true population variance.D) treat the two samples as one sample.

9) When figuring the pooled variance in an independent-samples t test,

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10) When using attable, the degrees of freedom used for an independent-samples t testis

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11) An experimenter hypothesizes that biology majors score higher than literature majors on anintelligence test. If the mean score for biology majors was 18.8 and the mean score for literature majorswas 21.3, and the̅̅̅̅̅̅̅̅was .9, the t score was

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