The document Ex 14.1 NCERT Solutions- Statistics Class 9 Notes | EduRev is a part of the Class 9 Course Class 9 Mathematics by VP Classes.

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**Q.1. Give five examples of data that you can collect from your day-to-day life. Sol.**

Five examples from day-to-day life:

- Number of students in our class.
- Number of fans in our school.
- Electricity bills of our house for last two years.
- Election results obtained from television or newspapers.
- Literacy rate figures obtained from Educational Survey

**Q.2. Classify the data in Q.1 above as primary or secondary data. Sol.**

Primary data; (i), (ii) and (iii)

Secondary data; (iv) and (v)

**Presentation of Data**

- Every group into which the raw data is condensed is called a
**class-interval**.

- In each of these classes, the least number is called
**the lower-class limit**and the greatest number is called the**upper-class limit**. - The difference between the upper limit and the lower limit of a class is called its
**class size.** - The difference between the maximum value and the minimum value of the observation is called the
**range.** - The class-mark of a class =

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