CK-12 Basic Probability and Statistics - A Short Course

http://www.ck12.org Chapter 6. Measures of Central Tendency - Basic

What is the median score?

7. The price per pound of Granny Smith apples at various supermarkets was

$1. 79 ,$1. 49 ,$1. 55 ,$1. 68 ,$1. 75 ,$1. 45 ,$1. 59 ,$1. 85 ,$1. 70 ,$1. 65

What is the median price of the apples?

8. A local running club hosted a 200-m race. The times of 9 of the runners were recorded as:

24. 2 s, 22. 9 s, 23. 1 s, 25. 6 s, 22. 5 s, 24. 0 s, 23. 3 s, 22. 3 s, 24. 6 s

What is the median time of the runners?

9. The weights in kilograms of eight young boys were 41, 37, 34, 37, 46, 38, 41, and 44. What is the median
   weight?


10. A student recorded the following marks on 10 Science quizzes:

66 , 51 , 74 , 69 , 71 , 58 , 79 , 82 , 64 , 77

What was the median mark?

11. The times in minutes taken by a girl walking to improve her lifestyle were 35, 36, 40, 39, 37, 42, and 30. What
    is the median time?


12. A member of the Over 60 bowling team recorded the following scores during a weekend tournament:

88 , 109 , 85 , 97 , 89 , 111 , 94 , 121 , 99 , 88 , 102 , 81

What was the median score?

13. A nurse who works relief at the local hospital has been recording her wages for the past eleven weeks. Her
    wages during this period were:

$600 $420 $725 $560 $400 $850 $675

$590 $390 $700 $740

What was her median wage?

14. A Boys and Girls Police Club has members from 11 years of age to 16 years of age. The ages of the fifty
    members are shown in the following table:

TABLE6.13:

Age of Members(yrs) Number of Members

11 5

12 9

13 3

14 11

15 10

16 12

Use the TI83 calculator to determine the median age of the members.

15. Bonus: A set of four numbers that begins with the number 5 is arranged from smallest to largest. If the median
    is 7, what is a possible set of numbers?

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