An educational researcher believes that information is BETTER communicated by reading than by a video presentation. One

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An educational researcher believes that information is BETTERcommunicated by reading than by a videopresentation. One group of students is given a pamphlet explainingnuclear energy and informed they will betested on this information. A separate group of students is shown avideo with the same information presentedin a fast-paced video form and also told that they will be testedon the information. One week later, all of thestudents take a test on nuclear energy. The descriptive statisticsfor their test results are listed below:Reading: mean = 49 variance (s2x) = 21.5 n = 13Video: mean = 46 variance (s2x) = 19.7 n = 13
(a) Calculate the appropriate statistic to test the nullhypothesis. (5 points)(b) Should the null hypothesis be rejected? Why or why not? (2points)(c) What should the researcher’s conclusion be? (d) Do the results of this study provide strongevidence that communicating information byreading is better than by video?