Wednesday 16 December 2020

Chapter 14 Statistics


Chapter 14 Statistics


Ex 14.1

Ex 14.1 Class 9 Maths Question 1.
Give five examples of data that you collect from your day-to-day life.
Following are the five examples which are related to day-to-day life :

  • Number of girl students in our class.
  • Number of computer sets in our computer lab.
  • Telephone bills of our house for last two years.
  • Number of students appeared in an examination obtained from newspapers.
  • Number of female teachers in all the schools in a state obtained from the education department.

Ex 14.1 Class 9 Maths Question 2.
Classify the data in Q.1 above as primary or secondary data.
We have,
Primary data: (i), (ii) and (iii)
Secondary data: (iv) and (v)