Worksheets › Class 11 › Statistics
Class 11 Statistics worksheet
CBSE Mathematics. Range, mean deviation, variance and standard deviation for raw, discrete and grouped data. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The range of 41, 65, 66, 83, 14, 29 is:
- 69
- 83
- 70
- 49
Answer
(a) 69
largest − smallest
- 2.
The mean deviation about the mean of 15, 8, 1, 20, 3, 1 is:
- 158/3
- 38/3
- 19/3
- 8
Answer
(c) 19/3
mean = 8; average of |xᵢ − 8|
- 3.
The variance of 14, 15, 11, 8 is:
- 10
- 15
- 15/2
- 5/2
Answer
(c) 15/2
mean 12; average of squared deviations
Section B · short answer
- 4.
Find the mean deviation about the mean for the data: 29, 34, 40, 33, 27, 35.
Answer
10/3
mean = 33; Σ|xᵢ − 33| = 20; ÷ 6
- 5.
Find the mean deviation about the median for the data: 28, 38, 32, 34, 35, 3, 38, 16.
Answer
33/4
median = 33; Σ|xᵢ − 33| = 66; ÷ 8
Section C · long answer
- 6.
Find the mean deviation about the mean for the grouped data (class: frequency): 30–50: 14; 50–70: 8; 70–90: 10; 90–110: 12; 110–130: 2; 130–150: 15. (Give answers to 2 decimal places where needed.)
Answer
32.21
class marks 40, 60, 80, 100, 120, 140; mean 88.20
Fresh sheets for your child
In the app, every Statistics sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.