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