X 1. A garden contains 39 plants. The following plants were chosen at random, and their...

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X 1. A garden contains 39 plants. The following plants were chosen at random, and their heights were recorded in cm: 38, 51, 46, 79, and 57. Calculate their heights' standard deviation. 2. P(X) is the probability density, with X being a discrete random variable. Find the standard deviation of x. 1 2 3 P(X) 0.3 0.6 0.1 3. Calculate the standard deviation for the data 3, 2, 5, and 6. 4. Find the standard deviation and variance for the following data: 10, 12, 8, 14, 16. X 1. A garden contains 39 plants. The following plants were chosen at random, and their heights were recorded in cm: 38, 51, 46, 79, and 57. Calculate their heights' standard deviation. 2. P(X) is the probability density, with X being a discrete random variable. Find the standard deviation of x. 1 2 3 P(X) 0.3 0.6 0.1 3. Calculate the standard deviation for the data 3, 2, 5, and 6. 4. Find the standard deviation and variance for the following data: 10, 12, 8, 14, 16.