Sample standard deviation Jordyn asked 8 people how many apps they each had on their phone. Here are their responses:
21, 28, 31, 46, 55, 60, 65, 70
The mean is © = 47 apps.
Which of these formulas gives the standard deviation?
Choose 1 answer
(21-8)+ (28-8)+ .
47
+ (70 - 8)
S =
(21 - 47)2 + (28 - 47)2 + ... + (70 - 47)?
7
8 =
(21 - 8) + (28 - 8) +...+(70 - 8)
8
11
47