NCERT Book Class 7 Mathematics (Part II) Chapter 5 Connecting the Dots...

5 CONNECTING
THE DOTS…

5.1 Of Questions and Statements
Your teacher tells you that they are meeting two of their childhood
friends this evening. One is 5 feet tall and the other is 6 feet tall. What is
your guess as to each friend’s gender based on this information?
You might have guessed that the 5-foot-tall person is a woman and
the 6-foot-tall person is a man. There is a chance that you are wrong. But
experience tells us that 5-foot-tall men and 6-foot-tall women are rare.
We have seen that, more often, men are taller than women.
The above is a simple example of statistical thinking. We regularly
come across statements like —

Jemimah’s batting has I take about
been very consistent over 15 minutes
the past year. We can to cycle from
school to home. I think my pen
expect a century from her
might last for 2
in tomorrow’s match.
more weeks; it is
time to get a new
one soon.
The population of
Since I started
their village has
to eat fruits and
reduced by about
vegetables more
100 in the last David spends
frequently, I am
decade. about 7 hours
able to run 2 km
daily in the school.
more each day.