Connecting the Dots Class 7 Long Question Answer

Connecting the Dots Class 7 Long Question Answer

Connecting the Dots Class 7 Long Question Answer

Question 1.

The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:

(i) Find the range of the rainfall in the above data.

Solution:

Arranging the rainfall during the week in the ascending order, we have :

0.0, 0.0, 1.0, 2.1, 5.5, 12.2, 20.5

Range = 20.5 - 0.0 = 20.5 mm.

(ii) Find the mean rainfall for the week.

Solution:

Sum of the rainfall during the week

= 0.0 + 0.0 + 1.0 + 2.1 + 5.5 + 12.2 + 20.5

= 41.3 mm

Mean = [latex]\frac {41.3}{7}[/latex] = 5.9 mm.

(iii) On how many days was the rainfall less than the mean rainfall ?

Solution:

For five days, the rainfall was less than the mean rainfall.

Question 2.

Consider this data collected from a survey of a colony.

(i) Draw a double bar graph choosing an appropriate scale.

What do you infer from the bar graph ?

(ii) Which sport is most popular ?

(iii) Which is more preferred, watching or participating in sports ?

Solution:

The graph is as under :

(i) It is inferred that more people prefer cricket and less athletics.

(ii) Most popular sport is cricket.

(iii) Watching is more preferred than participating.