Pulse rate (per minute) of 30 persons were recorded as 61, 76, 72, 73, 71, 66, 78, 73, 68, 81, 78, 63, 72, 75, 80, 68, 75, 62, 71, 81, 73, 60, 79, 72, 73, 74, 71, 64, 76 and 71. Construct a frequency table using class intervals of equal width, one class interval being 60-65. :

Pulse rate (per miute) of 30 persons were recorded as 61,76,72,73,71,66,78,73,68,81,78,63,72,75,80,68,75,62,71,81,73,60,79,72,73,74,71,64,76 and71. Construct a frequency table using class-invervals of equal width,one class interval being (60-65).

The marks scored by 40 students of class IX in mathematics are given below: 81, 56, 68, 79, 85, 13, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54. Prepare a frequency distribution with class size of 10 marks.

A grouped frequency distribution table with classes of equal sizes using 63 - 72 (72 included) as one of the class is constructed for the following data : 30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44. The number of classes in the distribution will be :

The following are the marks of 60 students in Mathematics 16,13,5,80,86,7,51,24,56,70,19,16,36,34,42,34,35,73,55,75,52,72,97,74,45,62, 68,86,35,81,75,55,26,95,31,7,78, 92,62,52,56,15,63,25,54,44,47,27,17,4,30 Construct a grouped distribution table with width 10 each of the class starting from 0-9.

The weight of 50 apples form a consignement are as below 113,131,75,82,204,81,84,118,110,104,107,80,141,111,143,136,78,.90,110,98,106, 99,84,107,186,76,82,109,100,115,125,107,115,93,119,89,87,139,129,130,68,73, 195,111,125,85,92,126,70,75. form the grouped frequency table by dividing the variable range into intervals of equal width of 20 g so that the mid vlaue of the first class intervals is 70 g.