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Test scores of a student before and after attending course

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Reference no: EM131684015

Question: A random sample of nine students was selected to test for the effectiveness of a special course designed to improve memory. The following table gives the scores in a memory test given to these students before and after this course.

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a. Construct a 95% confidence interval for the mean d of the population paired differences, where a paired difference is defined as the difference between the memory test scores of a student before and after attending this course.

b. Test at the 1% significance level whether this course makes any statistically significant improvement in the memory of all students. Assume that the population of the paired differences has a normal distribution.

Reference no: EM131684015

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