The marks obtained by 40 students of class VIII in an examination are given below: 18,8,12,0,8,16,12,5,23,2,16,23,2,10,20,12,9,7,6,5,3,5, 13,21,13,15,20,24,1,7,21,16,13,18,23,7,3,18,17,16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included).

The marks obtained by 40 students of class IX in an examination are given below: 18, 8, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included)

The marks obtained by 40 students of class VIII in an examination are given below: 16,17,18,3,7,23,18,13,10,21,7,1,13,21,13,15,19,24,16,3, 23,5,12,18,8,12,6,8,16,5,3,5,0,7,9,12,20,10,2,23 Divide the data into five groups, namely 0-5, 5-10, 10-15, 15-20 and 20-25 and prepare a grouped frequency table.

The marks obtained by 12 students in an examination (out of 50) are given below: 18, 35, 2, 27, 40, 0, 21, 33, 27, 8, 36, 23 Find the mean marks.

Given below are the ages of 23 students of class VIII in a school. Prepare a discrete frequency distribution. 15,16,16,14,17,17,16,15,15,16,17,15 16,16,14,16,15,14,15,16,15,14,15

Find the mean of the following frequency distribution, using step-deviation method: Class 0-10 10-20 20-30 30-40 40-50 Frequency 7 12 13 10 8

Following are the marks obtained by 30 students in an examination : {:(15,20,8,9,10),(16,17,20,24,30),(44,47,38,36,40),(27,25,28,30,19),(7,11,21,31,41),(37,47,23,20,17):} Taking class intervals 0-10 , 10-20,............ ., 40-50, construct a frequency table.

. Find the median of the given data: 8, 9, 12, 7, 5, 4, 18, 20, 6,3

Find the mean of the following frequency distributions: Class interval: 0-6 6-12 12-18 18-24 24-30 Frequency: 6 8 10 9 7

Find the mean of the following frequency distributions: Class interval: 0-6 6-12 12-18 18-24 24-30 Frequency: 7 5 10 12 6

Given below are the marks obtained by 30 students in an examination : {:(08,17,33,41,47,23,20,34,09,18,42,14,30),(19,29,11,36,48,40,24,22,02,16,21,15,32),(47,44,33,01,,,,,,,,,):} Taking class intervals 1-10, 11-20 ,......, 41 - 50 , Make a frequency table for the above distribution.