Basic statistics

Written by Hassan Raza (Mathematics)

10 Class 9 Mathematics questions with answers and explanations.

Printable worksheet with answer key

All questions with answers

What is the mean of 4, 6, 8, 10, 12?
- 1 7
- 2 40
- 3 9
- 4 8
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Correct answer: 8

Sum = 40, divided by 5 gives 8.

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What is the median of 3, 7, 5, 9, 1?
- 1 7
- 2 3
- 3 5
- 4 9
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Correct answer: 5

In order: 1, 3, 5, 7, 9. The middle value is 5.

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What is the mode of 2, 3, 3, 4, 5, 3, 6?
- 1 2
- 2 4
- 3 5
- 4 3
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Correct answer: 3

3 appears most often.

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The range of the data 5, 12, 8, 20, 3 is:
- 1 15
- 2 3
- 3 20
- 4 17
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Correct answer: 17

Range = largest minus smallest = 20 - 3 = 17.

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A pie chart shows data as:
- 1 Dots
- 2 Sectors of a circle
- 3 Bars
- 4 Lines
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Correct answer: Sectors of a circle

A pie chart divides a circle into sectors proportional to the data.

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The mean of 5 numbers is 12. What is their sum?
- 1 60
- 2 7
- 3 2.4
- 4 17
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Correct answer: 60

Sum = mean x number of values = 12 x 5 = 60.

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The mean of 3, 5 and 10 is:
- 1 8
- 2 6
- 3 5
- 4 18
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Correct answer: 6

Sum = 18, divided by 3 gives 6.

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In a bar chart the height of each bar shows the:
- 1 Frequency
- 2 Colour
- 3 Time only
- 4 Width
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Correct answer: Frequency

Bar height represents the value.

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The mode of 1, 2, 2, 3, 4, 4, 4 is:
- 1 1
- 2 3
- 3 2
- 4 4
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Correct answer: 4

4 occurs most often.

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The median of 10, 20, 30 is:
- 1 60
- 2 20
- 3 10
- 4 30
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Correct answer: 20

The middle value is 20.

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