The following data represents the travel time (in minutes) to school for nine students enrolled in Sullivan's College Algebra course. Treat the nine students as a population.
Amanda- 39
Amber-21
Tim-9
Mike-32
Nicole-30
Scot- 45
Erica-11
Tiffany-12
Glenn-39
A- Determine the population standard deviation.
B- Find three simple random samples of size 4, and determine the sample standard deciation of each.
C- Which samples underestimate the population standard deviation? Which overestimate the population standard deviation?