Question

At a large university, a mathematics placement exam is administered to all students. Samples of 36 male and 30 female students are randomly selected from this year’s student body and the following scores recorded:
a. Describe each set of data with a histogram (use the same class intervals on both histograms), the mean, and the standard deviation.
b. Construct 95% confidence interval for the mean score for all male students. Do the same for all female students.
c. Do the results found in part b show that the mean scores for males and females could be the same? Justify your answer. Be careful!
d. Construct the 95% confidence interval for the difference between the mean scores for male and female students.
e. Do the results found in part d show that the mean scores for male and female students could be the same? Explain.
f. Explain why the results in part b cannot be used to draw conclusions about the difference between the two means. 


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  • CreatedAugust 28, 2015
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