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Difference in abilities of students enrolled in statistics

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Reference no: EM131050418

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information.

                              Today (Population 1)       Five Years Ago (Population 2)

Sample Mean                    83                                         88

Sample Variance            112.5                                     54

Sample Size                       45                                        36

The 92.50% confidence interval for the difference between the two population means is (Round your answers to 2 decimal places.)

Reference no: EM131050418

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