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03

PRACTICE · CLASS 9 MATHEMATICS (NCERT)

Statistics Practice Questions & PYQs

Practice important exam questions and previous year problems for Class 9 Statistics organized by mark distribution for self-assessment.

01 · 1 MARK PRACTICE QUESTIONS

Short Answer / Objective Questions

1 MARK

Q1. What is the class mark of the class interval 130–150?

1 MARK

Q2. Give one example of secondary data.

02 · 2 MARKS PRACTICE QUESTIONS

Short Proofs & Calculations

2 MARKS

Q3. The relative humidity (in %) of a city for a month of 30 days was recorded as follows: Construct a grouped frequency distribution table with classes 84 - 86, 86 - 88, etc.

2 MARKS

Q4. Write two main differences between a bar graph and a histogram.

03 · 3 MARKS PRACTICE QUESTIONS

Intermediate Problem Solving

3 MARKS

Q5. Draw a histogram to represent the following frequency distribution: Class intervals: 10-20, 20-30, 30-40, 40-50, 50-60 with frequencies 6, 12, 20, 15, 7 respectively.

04 · 5 MARKS PRACTICE QUESTIONS

Long Answer & Varying Width Histograms

5 MARKS

Q6. A random survey of the number of children of various age groups playing in a park was found as follows: Age (1-2, 2-3, 3-5, 5-7, 7-10, 10-15, 15-17) with number of children (5, 3, 6, 12, 9, 10, 4). Draw a histogram to represent the data above taking adjusted frequencies for varying class widths.