You are estimating the cost of a personnel shelter and you have collected cost date on 10 shelters. The mean cost was $18549.00. the median cost is 19,106. There is a range in the cost of 10055. the variance is 130,021.the standard deviation is 3,610. If you use the average cost of the shelters as your estimate, then on average:

You could expect to be off by $10,095.

You could expect to be off by $340.90.

You could expect to be off by 20.42%.

You could expect to be off by 19.59%.