MCQ Quiz on Class 11 Maths Chapter 15 Statistics with Answers

We have compiled the MCQ Questions for Class 11 Maths Chapter 15 Statistics with Answers Pdf free download covering the entire syllabus for JEE and Boards. Practice MCQ Questions for Class 11 Maths with Answers on a daily basis and score well in exams. Refer to Statistics Class 11 MCQs Quiz Questions with Answers here along with a detailed explanation.

Statistics Class 11 MCQs Questions with Answers

MCQ Questions for Class 11 Maths Chapter 15 Statistics with Answers

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1. Let x1, x2, x3, ……… , xn, be n observations and X be the arithmetic mean. Then formula for the standard deviation is given by


2. The mean weight of a group of 10 items is 28 and that of another group of n items is 35.The mean of combined group of 10 + n items is found to be 30. The value of n is


3. If covariance between two variables is 0, then the correlation coefficient between them is


4. Varience is independent of change of


5. If the mean of the following data is 20.6, then the value of p is
x = 10  15   p   25  35
f =   3   10  25   7    5


6. The mean of 5 observations is 4.4 and their variance is 8.24. If three observations are 1,2 and 6, the other two observations are


7. Which one is measure of dispersion method


8. If one of the observation is zero then geometric mean is


9. The mean of a group of 100 observations was found to be 20. Later on, it was found that three observations were incorrect, which was recorded as 21, 21 and 18. Then the mean if the incorrect observations are omitted is


10.  The two lines of regression are 2x – 7y + 6 = 0 and 7x – 2y +1 = 0. What is correlation coefficient between x and y ?


11. If a variable takes discrete values x + 4, x – 7/2, x – 5/2, x – 3, x – 2, x + 1/2, x – 1/2, x + 5 (x > 0), then the median is


12. If the mean of first n natural numbers is 5n/9, then n =


13. If the varience of the data is 121 then the standard deviation of the data is


14.  For a moderately skewed distribution, quartile deviation and the standard deviation are related by


15. The coefficient of correlation r satisfies


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