Question

15 students of government school spend following numbers of hours in a month for doing their street cleaning 25,15,20,20,9,20,25,15,7,13,20,12,10,15,8
1)find mean,median,and mode of data
2)which value is depicted from above data

Answer 1

1)Mean=Sum of all observations/Total no.of observations

=25+15+20+20+ 9+ 20........./15

= 234/15=15.6

Median:7,8,9,10,12,13,15,15,15,20,20,20,20,25,25 (Arranging, the data in ascending order)

No.of observation=15

15 is an odd no. Therefore, the mode=8th [(n+1/2) th] term of the observation.

Hence,

Median=8th term=15

Mode is the observation having maximum frequency. Here the no. 20occurs maximum (4) times.Hence the mode of the observations is 20.