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A department is concerned that certain degree students may be receiving lower grades than other degree students. Two independent random samples have been selected 350 observations from population 1 (certain degree students) and 310 from population 2 (other students). The sample means obtained are X1(bar)=84 and X2(bar)=86. It is known from previous studies that the population variances are 4.6 and 5.0 respectively. Using a level of significance of .05, is there evidence that the certain degree students are receiving lower grades? Fully describe your answer.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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