8. The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows: Mon The Wed Thurs Sat Sun Day Rainfall (in mm) 0.0 12.2 2.1 0.0 20.5 5.5 1.0 20 (1) Find the range of the rainfall in the above data. (ii) Find the mean rainfall for the week. (iii) On how many days was the rainfall less than the mean rainfall. CU
Answers
Step-by-step explanation:
Given that
the rainfall(in mm) in a city on 7 days of a certain week recorded as follows
Day Mon Tue Wed Thus Fri Sat Sun
Rainfall(in mm) 0.0 12.2 2.1 0.0 20.5 5.3 1.0
We range=Highest Rain fall−lowest rainfall
=20.5−0.0
Range of the rainfall=20.5mm
We know mean=
No. of days
sum of rainfall in a city all days
=
7
0+12.2+2.1+0+20.5+5.3+1
=
7
41.1
Mean rainfall=5.87mm
from the above the data the rainfall less than mean rainfall
Day Mon Wed Thus Sat Sun
Rainfall(in mm) 0 2.1 0 5.3 1
Hence,
No. of days was rainfall less than the mean rainfall is 5 days.