SAMACHEER KALVI - 8th Maths - CHAPTER 6 - STATISTICS - Important 5 Marks

MATHS-I PAPER      

                           CHAPTER-6

I. ANSWER ALL THE FIVE OF THE FOLLOWING:                 5X 5 = 25

1. The EB bill(in Rs) of each of the 26 houses in a village are given below. Construct the frequency table.

215	200	120	350	800	600	350	400	180	210	170	305	204
220	4254    425	540	315	640	700	790	340	586	660	785	290	300

                       

2. Draw a suitable pie chart for the following data relating to the cost of construction of a house.

Particulars	Bricks	Steel	Cement	Timber	Labour	Others
Expenses	10%	15%	25%	10%	20%	20%

          Also, find how much was spent on labour if Rs 55000 was spent for cement.

3. In a village, there are 570 people who have cell phones. An NGO survey their cell phone usage. Based on this survey a histogram is drawn. 

NGO Survey

Answer the following questions:

(i) How many people use the cell phone for less than 3 hours?

(ii) How many of them use the cell phone for more than 5 hours?

(iii) Are people using cell phone for less than 1 hour?

4. The distribution of heights (in cm ) of loo people is given below. Construct a histogram and the frequency polygon imposed on it.

5. In a study of dental problem, the following data were obtained.

Represent the above data by a frequency polygon.

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