2 Too Many Emails Copyright © 2026 Pearson Education, Inc. 3. The statistician wants to draw conclusions about the entire accounting department, which has 240 employees in all. a. Based on the sample, what is the mean number of emails each employee is expected to receive daily? b. If the margin of error of the collected data is ±5%, what is the expected range of the mean of emails received by each employee daily? c. What is the range of emails the department as a whole might expect to receive daily? d. Based on the data, does this result seem reasonable? Why or why not? 4. The statistician also examines a sample of employees from the marketing department. Emails Received, Marketing Department 84 80 80 65 101 62 91 71 77 92 97 59 82 82 57 86 61 74 75 77 66 90 54 83 71 79 81 65 77 77 70 70 82 54 44 72 77 100 78 58 a. Is the mean number of emails received by marketing employees more or less than the mean number of emails received by accounting employees? b. Is the median number of emails received by marketing employees more or less than the mean number of emails received by accounting employees? 5. Finally, the statistician is asked to compare volume of emails for the two departments. a. Which set of data is more normally distributed? Which set of data is more skewed? b. Discuss with a partner: In which department is the volume of emails more evenly spread out across employees? Use an appropriate tone in your discussion. Record your thinking here.
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