What is sample mean footage in square feet? What is the sample standard deviation?

The frequency distribution in the table represents the square footage of a random sample of 499 houses that are owner occupied year round. Approximate the mean and standard deviation square footage. Click the icon to view the data table. The sample mean square footage is square feet. (Round to the nearest whole number as Housing Data Square Footage Frequency 0-499 3 500-999 15 1000-1499 31 1500-1999 124 2000-2499 120 2500-2999 77 49 Pre( 3000-3499 3500-3999 41 4000-4499 30 4500-4999 9