15 JEE Main 2020 Statistics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2020 previous-year questions from the Statistics chapter of Mathematics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Statistics chapter hub.
If the mean and the standard deviation of the data 3 , 5 , 7 ,   a ,   b are 5 and 2 respectively, then a and…
Consider the data on x taking the values 0 ,   2 ,   4 ,   8 ,   . . . . . ,   2 n with freque…
The mean and the standard deviation (s.d.) of 10 observations are 20 and 2 respectively. Each of these 10 observations…
If the variance of the first n natural numbers is 10 and the variance of the first m even natural numbers is 16 , then…
Let X = x ∈ N   :   1 ≤ x ≤ 17 and Y = a x + b   :   x ∈ X   and  …
The mean and variance of 8 observations are 10 and 13 . 5 , respectively. If 6 of these observations are 5 , 7 , 10 , 1…
Let x i 1 ≤ i ≤ 10 be ten observation of a random variable X . If ∑ i = 1 10 x i - p = 3 and ∑…
Let the observation x i 1 ≤ i ≤ 10 satisfy the equations ∑ i = 1 10 x i - 5 = 10 , ∑ i = 1 10 x…
If Σ i = 1 n x i - a = n and Σ i = 1 n x i - a 2 = n a ,   n ,   a > 1 , then the standard devi…
If the variance of the following frequency distribution: Class: 10 - 20              …
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