Question

A sample of college students was asked how much they spent monthly on a cell phone plan (to the nearest dollar). Find sample standard deviation.

Monthly Cell Phone Plan Cost ($)	Number of Students
10 - 19	8
20 - 29	16
30 - 39	21
40 - 49	11
50 - 59	4

Q13) The following data represent the difference in scores between the winning and losing teams in a sample of 15 college football bowl games from 2004-2005. Find sample standard deviation.

Point Difference	Number of Bowl Games
1 - 5	8
6 - 10	0
11 - 15	2
16 - 20	3
21 - 25	1
26 - 30	0
31 - 35	1

Answer 1