Two teachers recorded the information given below.
• Teacher A measured the heights (in cm) of 40 students of Class IX and organised the values into six continuous class intervals of equal width.
• Teacher B noted the favourite school subject of the same 40 students and found the frequencies for the five subjects: Mathematics, Science, English, Hindi and Social Science.
Answer the following:
(i) For the data collected by Teacher A, explain which graphical representation — histogram or bar graph — should be chosen and give two reasons for your choice.
(ii) For the data collected by Teacher B, explain which graphical representation should be chosen and give two reasons for your choice.
(iii) If Teacher A mistakenly draws the chosen graph with gaps between successive rectangles, what wrong impression will this give about the nature of the data? Explain your answer.