| 2024-05-12 | The means and variance of \(n\) observations \(x_1, x_2, x_3, \ldots x_n\) are 5 and 0 respectiv.... |
| 2024-05-12 | A group of 10 items has arithmetic mean 6. If the arithmetic mean of 4 of these items is 7.5 , t.... |
| 2024-05-12 | Median of \({ }^{2 n} C_0,{ }^{2 n} C_1,{ }^{2 n} C_2,{ }^{2 n} C_3, \ldots,{ }^{2 n} C_n\) (whe.... |
| 2024-05-12 | In an experiment with 15 observations on \(x\), the following results were available\[\sum x^2=2.... |
| 2024-05-12 | In a series of \(2 n\) observations, half of them equal \(a\) and remaining half equal \(-a\). I.... |
| 2024-05-12 | A sample of 35 observations has the mean 80 and Standard deviation as 4 . A second sample of 65 .... |
| 2024-05-12 | In a class of 100 students there are 70 boys whose average marks in a subject are 75 . If the av.... |
| 2024-05-12 | The variance of \(\alpha, \beta\) and \(\gamma\) is 9 , then variance of \(5 \alpha, 5 \beta\) a.... |
| 2024-05-12 | The median of a set of 9 distinct observation is 20.5 . If each of the largest 4 observations of.... |
| 2024-05-12 | If the standard deviation of the observations \(-5,-4,-3\), \(-2,-1,0,1,2,3,4,5\) is \(\sqrt{10}.... |
| 2024-05-12 | The average of \(n\) numbers \(x_1, x_2, x_3, \ldots, x_n\) is \(M\). If \(x_1\) is replaced by .... |
| 2024-05-12 | The mean value of the median and mean of the odd divisors of 360 is .... |
| 2024-05-12 | The standard deviation of a variate \(x\) is \(\sigma\). The standard deviation of the variable .... |
| 2024-05-12 | The Standard deviation of 7 scores \(1,2,3,4,5,6,7\) is .... |
| 2024-05-12 | Mean of \(n\) items is \(\bar{x}\). If these \(n\) items are increased by \(1^2, 2^2, 3^2, \ldot.... |
| 2024-05-12 | Find the mean deviation about the mean for the data
.... |
| 2024-05-12 | Mean deviation from the mean for the observations \(-1,0,4\) is .... |
| 2024-05-12 | If median \(=(\) mode +2 mean \() M\), then \(M\) is equal to: .... |
| 2024-05-12 | The mean of a group of 100 observations was found to be 20 . Later on: it was found that three o.... |
| 2024-05-12 | If a variable takes the discrete values\[\alpha+4, \alpha-\frac{7}{2}, \alpha-\frac{5}{2}, \alph.... |
| 2024-05-12 | The median of \(10,14,11,9,8,12,6\) is .... |
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