14 JEE Main 2019 Statistics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2019 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.
The outcome of each of 30 items was observed; 10 items gave an outcome (1)/(2)-d each, 10 items gave outcome (1)/(2) ea…
If for some x ∈ R , the frequency distribution of the marks obtained by 20 students in a test is: Marks 2 3 5 7 F…
If both the mean and the standard deviation of 50 observations x 1 ,   x 2 ,   … ,   x 50 are equa…
5 students of a class have an average height 150   c m and variance 18   c m 2 . A new student, whose height…
A student scores the following marks in five tests: 45,54,41,57,43 . His score is not known for the sixth test. If the…
The mean and the median of the following ten numbers in increasing order 10 ,   22 ,   26 ,   29 ,  …
The mean of five observations is 5 and their variance is 9.20 . If three of the given five observations are 1,   3…
A data consists of n observations: x 1 ,   x 2 ,   …   ,   x n . If ∑ i = 1 n x i + 1 2…
If the mean and standard deviation of 5 observations x 1 ,   x 2 ,   x 3 ,   x 4 ,   x 5 are 10 and…
If the sum of the deviations of 50 observations from 30 is 50 , then the mean of these observations is :
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