| (i) What is the range of the data? |
| (ii) What is the mean height of the students? |
| (iii) How many students are there whose height is more than the mean height? |
A)
(i) (ii) (iii) 30 100.5 3
B)
(i) (ii) (iii) 31 148.6 5
C)
(i) (ii) (iii) 32 149 5
D)
(i) (ii) (iii) 28 148.6 4
Correct Answer: B
Solution :
(i) Range = Maximum value-Minimum value \[=166-135=31\] (ii) Mean height of students \[=\frac{Total\text{ }height\text{ }of\text{ }students}{Number\text{ }of\text{ }students}\] \[=\frac{\begin{align} & 147+139+135+136+149+166+152 \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,+163+155+144 \\ \end{align}}{10}\] \[=\frac{1486}{10}=148.6\] (iii) Height of students more than the mean height are 149,166, 152, 163, 155. i.e., 5 student's height is more than mean height.
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