Samantha earns $8.50 per hour for babysitting. She takes a survey of her friends to see what they charge per hour. The results are {$8.00, $8.50, $9.00, $7.50, $15.00, $8.25, $8.75}. Find and interpret the standard deviation of the data.

Carla participates in competitive archery. Each competition allows a maximum of 90 points. Carla’s results for the last 8 competitions are {76,78,81,75,80,80,76,77}. Find and interest the standard deviation of the data.