A large bank is interested in examining the distribution of client ages. They have millions of clients. Although they know the age of each client, it would take too long to produce graphs that contain the entire population. They instead take a simple random sample of 25 customers and create the histogram of ages shown below. If you need to calculate a standard deviation, round it to 2 decimal places.

Histogram of client ages 6 5 4 W N 1 O 21-25 26-30 36-40 41-45 46-50 51-55 56-61