Page 263 - ICSE Math 7

5. List the natural numbers whose measure of central tendencies is as under:

mean = median = mode = 4. Is the answer unique?
6. The bar graph represents the number of hours a programmer spent on computers per week over
the five weeks.
Hours spent on computers

Y
18
16
Number of hours 12
14
10
8
6
5
4
2
0 X
Week 1 Week 2 Week 3 Week 4

(a) How many hours did the programmer spend on computers in the third week?
(b) What is the median, range and average number of hours spent on computers per week?

THINK SMART

1. The range of a data is calculated as (15 – 3) = 12. Which of the following can be true? Justify
your answer for each option.
(a) The mode of the data is 15. (b) The mean of the data is 3.
(c) The median of the data is less than 15.

2. A data is represented by a bar graph. What does the difference between the heights of the tallest
and the shortest bars on a bar graph represent.
(a) Median (b) Range (c) Mode (d) Median

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