Homework 3

1.

The local Tupperware dealers earned these commissions last month. What was the mean commission earned? Round your answer to the nearest cent.

132.86, 444.69, 144.06, 456.15, 416.16, 150.96, 417.26, 334.95, 320.74, 447.05, 251.74, 480.86

2.   Listed below are the amounts of weight change (in pounds) for 12 women during their first year of work after graduating from college. Positive values correspond to women who gained weight and negative values correspond to women who lost weight. What is the mean weight change? Round your answer to one more decimal place than is present in the original data values.

3, 17, 10, 20, 9, 20, 18, 11, -16, -9, 10, -15

3.  The normal monthly precipitation (in inches) for August is listed for different U.S. cities. Find the median monthly precipitation. Round your answer to one more decimal place than is present in the original data values.

1.6, 1.9, 5.1, 5.1, 0.3, 1.9, 4.5, 5.2, 5.8, 4.2

4.  The students in Hugh Logan’s math class took the Scholastic Aptitude Test. Their math scores are shown below. Find the median score. Round your answer to one more decimal place than is present in the original data values.

461, 666, 462, 202, 627, 592, 784, 668, 595, 277

5.   Find the mode(s) for the given sample data. (If there are more than one, enter the largest value for credit. If there is no mode, enter 0 for credit.)

7.56, 9.65, 1.18, 5.84, 3.24, 13, 5.84, 6

6.   Find the mode(s) for the given sample data. (If there are more than one, enter the largest value for credit. If there is no mode, enter 0 for credit.)

10, 5, 8, 9, 2, 6, 8

7. 

The weights (in pounds) of six dogs are listed below. Find the standard deviation of the weight. Round your answer to one more decimal place than is present in the original data values.

98, 91, 69, 81, 71, 20

8.   Listed below are the amounts of weight change (in pounds) for 12 women during their first year of work after graduating from college. Positive values correspond to women who gained weight and negative values correspond to women who lost weight. What is the standard deviation of the weight change? Round your answer to one more decimal place than is present in the original data values.

-4, -3, 13, 13, -1, 18, 20,-13, 1, 2, -16, -3

9.   The data shows the roundtrip mileage that randomly selected students drive to school each day. Find the mean of the frequency distribution. Round your answer to one more decimal place than is present in the original data values.

Miles / Frequency 
10-14 /  15  
15-19 /  2
20-24 /  15
25-29 /  20
30-34 /  9

10.   The data shows the roundtrip mileage that randomly selected students drive to school each day. Find the standard deviation of the frequency distribution. Round your answer to one more decimal place than is present in the original data values.

Miles / Frequency 
10-14 /  12  
15-19 /  7
20-24 /  21
25-29 /  1
30-34 /  9