Bonus 2 (20 points)

Due: 5-31-2005 before class

For the Bonus 2, you need to show all your work for each part of the answers. Only answers without showing your work will NOT give you any grades. You need to do it before Tuesday. Work need to turn in as soon as you walk into classroom. All the problems need to compute to the nearest tenth.

A. Given the following stem-and-leaf display, find the (10 points) (check book Page 799-801 for definition of stem-and-leaf)

1) Median        2) Mean        3) Mode        4) Range        5) Midrange 6) Standard Deviation 7)Variance

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          Stem                                        Leaf            

            4                                2    9

            5                                1    3    5    6

            6                                2    3    3    4    7    8

            7                                4    5

            8                                0    3    5    8 8 8

            9                                2    7

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B. Mark average 60 miles per hour during the 30-miles trip to college. Because the heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip? (2 %)

C. After six Math 102 tests, Amanda has a mean score of 88. The finial will be another 100-point test and is to be weighted as three tests. What grade Amanda need to score in order to raise her average to 90? (2%)

D. In page 792 of textbook, using data from Exercise #22. Find the mean, median, mode, and standard deviation. (6%)