Question

Question 2 The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 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 feature do you observe from this tabular representation?

Class 9 - Math - Statistics Page 245"

Answer 1

Solution--- The minimum and maximum km in the given raw data are 2 and 32 .It is given that 0----5is one of the class intervals and class size is same.So, the classes of equal size are ....

0-5,5--10,10---15,15---20,20----25,25---30 and 30---35...

I show in the figure .......Thus,the frequency distribution table is as given below::-||||||Upper side.....


In this the upper limit of a class is not included in the class.In the class 0 to 5 of km .distance travelled by the engineer to their place of work ,an engineer who is to travel 5 km is not included in this class.He is counted in the next class engineers out of 40 lives at a distance not more Than 15 km from their resistance..

Hope helped!!!

Answer 2

it can observe that there are very few engineer whose homes are at home than or equal to 20 km distance from their work place . most of engineers have their work place up to 15 km distance from their homes