Answer:
A. 4.8
Step-by-step explanation:
I would just go ahead and answer questions like these using a calculator but the theory behind this is important so for that you will have to dig deeper.
The generally accepted formula for sample standard deviation is in the attached image
where
s = standard deviation
[tex]x_i[/tex] are the individual observations
[tex]\overline{x}[/tex] is the mean
N is the number of data points(observations)
For example if you surveyed 20 students in a college on how many hours of homework they spend on every week you could end up with a wide range of numbers
Each of those 20 numbers corresponds to each of the [tex]x_i[/tex] where i = 1 to 20 and N = 20(sample size)
With a calculator the computed standard deviation is
4.7509....
which rounded to the nearest tenth is 4.8
