An industrial psychologist at a company has heard that desk

An industrial psychologist at a company has heard that desk bikes could help employees to lose weight, increase their stamina, and improve productivity. Sixteen employees were provided with desk bikes and the total number of pounds they lost, after one month, was recorded. Here are the data, in pounds lost, per employee:

4

8

12

0

2

20

18

0

12

6

12

16

10

8

12

4

4. What is the range of this distribution?

a. 0 t o 20 b.   20

c. 18 d. 4

5. What is the mean number of pounds that were lost by the employees in one month?

a.

9.88

b.

10.4

c.

12

d.

9

6. What is the median number of pounds that were lost by the employees in one month?

a.

8

b.

9

c.

10

d.

11

7. What is the variance of the number of pounds that were lost by the employees in one month?

a.

37.33

b.

9.72

c.

9.85

d.

6.11

8. What is the Interquartile range for this distribution?

a.

4

b.

8

c.

9

d.

12

9. How many outliers are in this distribution?

a. 0 b. 1

c.   2

d. Unable to determine from this information

4

8

12

0

2

20

18

0

12

6

12

16

10

8

12

4

Solution

(4) range =Max - Min = 20-0 =20

Answer: b.   20

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(5) Answer: d. 9

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(6) Answer: b. 9

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(7) Answer: a. 37.33

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(8) Answer: b. 8

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(9) Answer: a. 0