Complete the chart to find the mean, variance and standard deviation. remember to use commas and round numbers to the nearest tenth. x _ x _ x - x _ (x - x)2 1. 900 = 466.2 = the mean is 2. 35 = -398.8 = 159,041.4 the median is 3. 500 = 66.2 = the variance is 99,667.2 4. 300 = -133.8 = the standard deviation is σ x = _ x = _ σ (x - x)2 = 398,668.6 n =