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.

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 : For how many days, was the concentra-tion ofsulphur dioxide more than 0.11 parts per million.

The relative humidity (in %) of a certain city for a month of 30 days was as follows : : Construct a grouped frequency distribution table with classes 84 - 86, 86-88 etc.

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.

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 ?

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.

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.

In a study of numer of road accidents in a city, the observations for the 30 days of April 2003,were 4,3,5,6,4,3,2,5,4,2,6,2,1,2,2,0,5,4,6,1,3,0,5,3,6,1,5,5,2 and 6. Prepare a frequency distribution table for the above data.