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Several factors influence the value of the independent-samples t statistic (that is, tobs). Some factors affect...

Several factors influence the value of the independent-samples t statistic (that is, tobs). Some factors affect the numerator and others the denominator. For each of the following, indicate (by circling your choice) whether the factor influences the numerator or denominator of t and determine whether the effect would be to increase the value of t (farther from 0) or decrease the value of t (closer to 0). In each case, assume that all other factors remain constant.

a. Increasing the difference between the two sample means ...

... affects the numerator or denominator ... causes t to get bigger or t to get smaller

b. Decreasing the size of the two samples ...

... affects the numerator or denominator ... causes t to get bigger or t to get smaller

c. Increasing the size of the sample variances ...

... affects the numerator or denominator ... causes t to get bigger or t to get smaller

Math   Statistics-And-Probability   
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