In the series of \( 2 n \) observations, half of them each equal to \( a \) and remaining half e....

Channel:
Subscribers:
443,000
Published on ● Video Link: https://www.youtube.com/watch?v=t8RRQin7ZNk



Duration: 4:16
0 views
0


In the series of \( 2 n \) observations, half of them each equal to \( a \) and remaining half each equal to \( -a \). If the standard deviation of the observations is 2 , then \( |a| \)
\( \mathrm{P} \)
is equal to
(1) \( \frac{1}{n} \)
(2) \( \sqrt{2} \)
(3) 2
(4) \( \frac{\sqrt{2}}{n} \)



📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live




Other Videos By PW Solutions


2024-01-22The standard deviation of a variable \( \mathrm{x} \) is 10 . Then, the standard deviation of \(....
2024-01-22Mean deviation of the series \( a, a+d, a+2 d, \ldots \ldots \) \( a+2 \) nd from its mean is....
2024-01-22The variance of \( \alpha, \beta \) and \( \gamma \) is 9 , then the variance of \( 5 \alpha, 5 ....
2024-01-22Let \( x_{1}, x_{2}, \ldots, x_{n} \) be ' \( n \) ' observations. Let \( w_{i}=l x_{i}+k \) for....
2024-01-22Match the following columns \begin{tabular}{|l|l|c|c|} \hline \multicolumn{1}{|c|}{ Column-I } &....
2024-01-22The mean of five observations is 4 and their variance is 5.2. If three of these observations are....
2024-01-22The weighted mean of first \( n \) natural numbers whose weight are equal to the squares of corr....
2024-01-22Consider the following distribution: \begin{tabular}{|l|l|l|l|l|l|} \hline Size \( \left(x_{i}\r....
2024-01-22The mean and median of the following number in increasing order \( 3,4,6, x, 10, y \) are ' 7 ' ....
2024-01-22The weighted mean of first \( n \) natural numbers whose weight are equal to the squares of corr....
2024-01-22In the series of \( 2 n \) observations, half of them each equal to \( a \) and remaining half e....
2024-01-22The mean and variance of 5 observations of an experiment are 4 and 5.2 respectively. If from the....
2024-01-22The arithmetic mean of the following data is given by \begin{tabular}{|l|l|l|l|l|l|} \hline Vari....
2024-01-22The mean square deviation of a set \( \mathrm{n} \) observations \( x_{1}, x_{2}, \ldots \ldots ....
2024-01-22Let \( x_{1}, x_{2}, \ldots . x_{n} \) be \( \mathrm{n} \) observation such that \( \sum x_{i}^{....
2024-01-22If the standard deviation of \( x_{1}, x_{2}, \ldots x_{n} \) is 3.5 , then the standard deviati....
2024-01-22Probability that ' \( A \) ' speaks truth is \( 4 / 5 \). A coin is tossed. ' \( A \) ' reports ....
2024-01-22The mean of the following freq. table is 50 and \( \Sigma \mathrm{f}=120 \) \begin{tabular}{|l|l....
2024-01-22The mean deviation about median from the following data \( 340,150,210,240,300,310,320 \), is....
2024-01-2210 is the mean of a set of 7 observations and 5 is the mean of a set of 3 observations. The mean....
2024-01-22Let A \& B are two independent events such that P(A) \( =\frac{1}{3} \) and \( \mathrm{P}(\mathr....