The heights 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.

The heights of 50 students, measured to the nearest centimetres have been found to be as follows : : What can you conclude about their heights from the table ?

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.

The blood groups of 30 students of a class VIII are recorded as follows : Represent this data in the form of a frequency distribution table. Which is themost common and which is the rarest blood group among these students ?

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 ?

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 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.

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

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.

The lengths of 40 leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table . Find the median length of the leaves. (Hint : The data needs to be converted to continuous classes for finding the median, since the formula assumes continuous classes, The classes then change to 117.5 -126.5, 126.5-135.5,....171.5 - 180.5.)