** Let os be the median of a symmetric distribution that is of the contuous type. To test, with a = 0.01, the hypothesis Ho: fo.s = 75 against H₁: fo.s> 75, we observed a random sample of size n = 18. Let it be given that the deviations of these 18 values from 75 are the following numbers: 1.5, -0.5, 1.6, 0.4, 2.3, -0.8, 3.2, 0.9, 2.9, 0.3, 1.8, -0.1, 1.2, 2.5, 0.6, -0.7, 1.9, 1.3.

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