Can mode be calculated for grouped data with unequal class sizes?

The mean value can be calculated from both ungrouped and grouped data. Which one do you think is more accurate? Why?

A company manufactures car batteries of particular type. The life (in years) of 40 batteries was recorded as follows: Construct a grouped frequency distribution table with exclusive classes for this data, using class intervals of size 0.5 starting from the interval 2-2.5.

In which class of algae, gametes are pyriform (pear-shaped) and bear two unequal laterally attached flagella?

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: (i) Make a grouped frequency distribution table for this data with class intervals as 0.00 -0.04, 0.04 -0.08, and so on. (ii) For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million ?

When is it more convenient to use grouped data for analysis?

18 mice were placed in two experimental groups and one control group with all groups equally large. In how many ways can the mice be placed into three groups ?

As , unequal forces F_(1) and F_(2) (F_(2) lt F_(1)) act on a rod of length L. Calculate the tension at a point situated at a distance y from end A. ?

Is the mode always at the centre of the data ?

The distance (in km) of 40 engineers from their 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 (5 not included). What main features do you observe from this tabular representation ?

The following values are calculated in respect of heights and weights of the students of a section of class XI : Can we say that the weights show greater variation than the heights?