A company manufactures carbatteries of particular type. The lives (in years) of 40 such batteries were recorded as follows :
Construct a grouped frequency distribution table for this data, using class intervals of size 0.5 starting from the interval 2— 2.5.

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows : : Make a frequency distribution table for this data, taking class width 5 and one of the class interval as 5— 10

Distance of 40 engineers from their place of residence to their place of work were found as follows construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5. what main featues do you observe from his tabular representation.

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows : Make a grouped frequency distribution table for this data with class intervals as 0.00 - 0.04, 0.04 -0.08 and so on.

Distance (in km) of 40 engineers from their place of residence to their place of work were found as follows Construct n grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0— 5 (5 not included). What main features do you observe from this tabular representation ?

The height of 50 students, measured to the nearest centimetres have been found to be as follows: Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160-165, 165-170 etc.

Following are the numbers of members in 25 familles of a village 7, 9, 8, 8, 7, 6, 4, 3, 7, 9, 8, 8, 5, 4, 7, 7, 7, 8, 6, 5, 4, 4, 3, 6, 5 Prepare a frequency distribution table for the data using class intervals 0-3, 3-6............so on.

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).

Construct a frequency distribution table for the data on weights ( in kg.) of 20 students of a class using intervals 30-35,35-40 and so on. 40,38,33,48,60,53,31,46,34,36,49,41,55,49,65,42,44,47,38,39.