Tana's times for the 50-yard freestyle at the last 5 swim meets had a range of 3.5 seconds and a sample standard deviation of 1.25 seconds.

Which statements correctly describe Tana's swim times?

Select all that apply.

A: Tana's fastest swim time is 3.5 seconds better than her slowest swim time.

B: Tana's fastest swim time is 1.25 seconds better than her slowest swim time.

C: Tana's typical swim times are about 1.25 seconds from the mean on average.

D: Tana's typical swim times are about 3.5 seconds from the sample standard deviation.