CBSE Class 11 Statistics Worksheet B

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1. Find the median for the following data.

2. Write the formula of mean deviation about the median

3. Find the rang of the following series 6,7,10,12,13,4,8,12

4. Find the mean of the following data 3,6,11,12,18

5. Calculate the mean deviation about the mean for the following data

6. Find the mean deviation about the median for the following data

7. An analysis of monthly wages point to workers in two firms A and B, belonging to the same industry, given the following result.

8. Find the mean deviation about the median of the following frequency distribution

9. Calculate the mean deviation from the median from the following data

10. Let x₁,x₂ , ......  x_n  values of a variable Y and let ‘a’ be a non zero real number. Then prove that the variance of the observations  ay₁, ay₂,......ay_n  is a² var (Y ). also, find their standard deviation.

11. 200 candidates the mean and standard deviation was found to be 10 and 15 respectively. After that if was found that the scale 43 was misread as 34. Find the correct mean and correct S.D. 

12. Find the mean deviation from the mean 6,7,10,12,13,4,8,20

Click on link below to download CBSE Class 11 Statistics Worksheet B.