Starting Date 

Wednesday, February 10, 2016

last date 

Tuesday, February 16, 2016

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Students from Schools A and B are compared on the basis of their scores on an aptitude test. Two random samples of 90 and 100 students are selected from school A and B respectively. The sample means are 76.4 and 81.2, whereas the sample standard deviations are 8.2 and 7.6 respectively. Establish a 98% confidence interval for the difference in population mean scores between students of Schools A and B. 

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