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Class 9
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Mathematics
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Statistics Worksheets

1.

Fill in the blanks: Tally marks are used to find _____________

1. Class limit
2. Frequency
3. Class mark
4. None of these

2.

Fill in the blanks: In a histogram, each class rectangle is constructed with base as ____________

1. Class interval
2. Frequency
3. Class limit
4. None of these

3.

Fill in the blanks: Median of first 10 odd natural number is ______

1. 3
2. 7
3. 9
4. 5

4.

Choose the correct option: The maximum frequency 10 is for the observation 4. The mode of the data is _________.

1. 10
2. 4
3. 3
4. None of these

5.

Choose the correct option: The median of observations 17, 18, 20, 22, x+2, x+4, 31, 35, 37 is found to be 24. If the observations have been arranged in ascending order, the value of x will be ________.

1. 22
2. 30
3. 20
4. 25

6.

What is the class size of 10 – 14?

1. 2
2. 3
3. 4
4. None of these

7.

The data has been arranged in ascending order: 14, 19, 25, 29, x, 39, 41, 48, 54. If the median of the data is 35. Find x.

1. 34
2. 39
3. 33
4. 35

8.

The mean of 200 observations is 60. If one of the observation which was 100 is replaced by 300 then what will be the resulting mean?

9.

The mean of five numbers is 50. If one number is excluded the mean becomes 60. Find the excluded number.

1. 10
2. 20
3. 30
4. 55

10.

For drawing a frequency polygon of a continous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are respectively.

1. upper limits of the classes
2. lower limits of the classes
3. class marks of the classes
4. None of these

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