Question

A mathematics teacher wanted to see, whether the new technique of teaching she applied after the quarterly test was effective or not. She took the scores of the 5 weak children in the quarterly test (out of 25) and in the half-yearly test (out of 25): [4 MARKS]

$\begin{array}{cccccc}\text{Students}& \text{Ashish}& \text{Arun}& \text{Kavish}& \text{Maya}& \text{Rita}\\ \text{Quarterly}& 10& 15& 12& 20& 9\\ \text{Half yearly}& 15& 18& 16& 21& 15\end{array}$

Draw a double bar graph. Using the graph answer the following questions.
(i) Is the new technique of teaching effective?
(ii) Who has benefitted more from the new technique?

Answer 1

Double bar graph: 2 Marks
Each part: 1 Mark

(i) Double bar graph :

Scale: y axis - 1 cm = 5 units



(i) Every student scored more in the half-yearly than the quarterly.

$\Rightarrow$ New technique of teaching is effective.

(ii) The difference of marks scored by Rita in quarterly and half yearly is maximum.

$\Rightarrow$ Rita has benefitted more from the new technique.