You want to make a statement about the variability in the costs of personnel shelters. After collecting sample data (cost in $K) on 7 shelters you perform some preliminary calculations.

Given the information provided:

[Image Description: Xbar = $47.25K, Summation of (X_i - Xbar)² =555.50]

1) The standard deviation is about $79.36K

2) The coefficient of variation is about 20.36%

3) The coefficient of variation is about 17.64%

4) The variance is about $69.44K