Question

8. The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:
Day
Mon Tue Wed Thurs
Sun
Fri Sat
Rainfall
0.0 12.2 2.1 0.0 20.5 5.5 1.0
(in mm)
(1) Find the range of the rainfall in the above data.
2) Find the mean rainfall for the week.
t?
3) On how many days was the rainfall less than the mean rainfall.​

Answer 1

Step-by-step explanation:

1)Range=max.value-min.value

=20.5-0.0

=20.5

THE RANGE IS 20.5.

2)mean=sum of observations/no.of observations

=(0.0+12.2+2.1+0.0+20.5+5.5+1.0)÷7

=41.3÷7

=5.9

THE MEAN IS 5.9

3)on 4 days the rainfall was less than mean rainfall.