Question

Lucas recorded his lunch expenditure each day for one week in the table below.

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Expenditure $4.85 $5.10 $5.50 $4.75 $4.50 $5.00 $6.00


Find the mean, standard deviation, and variance of Lucas’ lunch expenditures. Round to the nearest thousandth

Answer 1

I only know how to find mean: add all costs of lunches first:
4.85 + 5.10 + 5.50 + 4.75 + 4.50 + 5.00 + 6.00 = $35.70

Then divide 35.70 by 7 and you will get _._ = mean.

Answer 2

5.1?