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March 27, 2015

Homework Help: statistics

Posted by Vannessa on Tuesday, August 4, 2009 at 1:34pm.

An educator is considering two different videotapes for use in a half-day session designed to introduce students to the basics of economics. Students have been randomly assigned to two groups, and they all take the same written examination after viewing the videotape. The scores are summarized here. Assuming normal populations with equal standard deviations, does it appear that the two videotapes cold be equally effective? What is the most accurate statement that could be made about the p-value for the test?
Videotape 1: x1 = 77.1 s1 = 7.8 n1 = 25
Videotape 2: x2 = 80.0 s2 = 8.1 n2 = 25

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