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Practice QuestionsMCQ (Single Correct Answer)
1
The mean deviation about the mean for the date $4,7,8,9,10,12,13,17$ is
KCET 2025
2
Let $a, b, c, d$ and $e$ be the observations with mean $m$ and standard deviation $S$. The standard deviation of the observations $a+k$, $b+k, c+k, d+k$ and $e+k$ is
KCET 2024
3
The mean of 100 observations is 50 and their standard deviation is 5. Then, the sum of squares of all observations is
KCET 2023
4
If the standard deviation of the numbers $$-1, 0,1, k$$ is $$\sqrt{5}$$ where $$k>0$$, then $$k$$ is equal to
KCET 2022
5
The standard deviation of the numbers $$31,32,33 \ldots 46,47$$ is
KCET 2021
6
The standard deviation of the data 6, 7, 8, 9, 10 is
KCET 2020
7
Mean and standard deviation of 100 items are 50 and 4 , respectively. The sum of all squares of the items is
KCET 2019
8
For the probability distribution given by
$$ \begin{array}{|c|c|c|c|} \hline X=x_i & 0 & 1 & 2 \\ \hline P_i & \frac{25}{36} & \frac{5}{18} & \frac{1}{36} \\ \hline \end{array} $$
the standard deviation $(\sigma)$ is
$$ \begin{array}{|c|c|c|c|} \hline X=x_i & 0 & 1 & 2 \\ \hline P_i & \frac{25}{36} & \frac{5}{18} & \frac{1}{36} \\ \hline \end{array} $$
the standard deviation $(\sigma)$ is
KCET 2018
9
If coefficient of variation is 60 and standard deviation is 24 , then Arithmetic mean is
KCET 2017