Prepare the frequency array of marks obtained by 25 students of a class in Economics test.

20,15,20,30,40,25,25,30,40,20,35,35,50,15,50,25,40,40,30,50,25,30,30,15,45.

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Frequency array of marks obtained by 25 students of a class in Economics test.

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Q. Following is the frequency distribution of marks obtained by students in Economics and Statistics . Analyse the data by drawing a Lorenz Curve.

Marks (mid-values)	:	5	15	25	35	45	55	65	75	85	95
No.of students (Economics)	:	10	12	13	14	22	27	20	12	11	9
No. of students (Statistics)	:	1	2	26	50	59	40	10	8	3	1

Q. The marks obtained (out of 20) by 30 students of a class in a test are given below:
7, 10, 8, 16, 13, 14, 15, 11, 18, 11, 15, 10, 7, 14, 20, 19, 15, 16, 14, 20, 10, 11, 14, 17, 13, 12, 15, 14, 16, 17.
Prepare a frequency distribution table for the above data using class intervals of equal width in which one class interval in 3–8 (including 2 and excluding 8). From the frequency distribution table so obtained, draw a histogram.

Q. The frequency distribution of marks obtained by students in a class test is given below:

Marks	:	0-10	10-20	20-30	30-40	40-50
No. of Students	:	3	10	14	10	3

Draw a histogram to represent the frequency distribution of marks . Comment on the shape of the histogram.

In a class, following were the marks obtained by 20 students in a maths test.
20, 40 ,50 ,20 , 60 , 50 ,100, 20, 50, 100, 40, 60, 100, 50, 20 ,60, 100 , 50, 40 , 20. Make a frequency distribution table. [2 MARKS]

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Prepare the frequency array of marks obtained by 25 students of a class in Economics test. 20,15,20,30,40,25,25,30,40,20,35,35,50,15,50,25,40,40,30,50,25,30,30,15,45.

Frequency array of marks obtained by 25 students of a class in Economics test.

Prepare the frequency array of marks obtained by 25 students of a class in Economics test.

20,15,20,30,40,25,25,30,40,20,35,35,50,15,50,25,40,40,30,50,25,30,30,15,45.