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. 45 = -357.5 = the mean is
2. 340 = -62.5 = the variance is
3. 400 = -2.5 = the standard deviation is
4. 825 = 422.5 = n =
σ x = x = σ (x - x)2 = 310,225.2