The sample size is n = 4 The provided sample data along with the data required to compute the sample mean and sample variance are shown in the table below:
X | X^{2} | |
3.9 | 15.21 | |
2.6 | 6.76 | |
4.3 | 18.49 | |
2.2 | 4.84 | |
Sum = | 13 | 45.3 |
The sample mean is computed as follows:
Also, the sample variance is
Therefore, the sample standard deviation s is
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