Mean and standard deviation

The accompanying frequency distribution represents the square footage of a random sample of 500 houses that are owner occupied year round. Approximate the mean and standard deviation square footage. Click the icon to view the data table. The mean square footage is x = (Round to the nearest integer as needed.) Housing Data Square footage Frequency 0 - 499 9 500 - 999 13 1,000 - 1,499 36 1,500- 1,999 115 2,000 - 2,499 125 2,500- 2,999 81 3,000 - 3,499 47 3,500- 3,999 4,000 - 4,499 22 4 500 - 4 999