Question

What is the standard deviation of the data set given below?

2, 3, 6, 9, 10

A. 10 squared
B. 3.5 squared
C. 12.5
D. 10
E. 3.5
F. 12.5 squared

Answer 1

first find the mean

Answer 2

the mean is 6

Answer 3

actually lets divide by n-1, since you have sample data

Answer 4

$$ \large st.dev = \sqrt{\frac{ ( 2- 6 )^2 + (3 - 6 )^2 + (6-6 )^2 +(9-6 )^2 }{5-1}}$$

Answer 5

i got 13.8

Answer 6

actually i got 3.4

Answer 7

$$ \large{ st.dev = \sqrt{\frac{ ( 2- 6 )^2 + (3 - 6 )^2 + (6-6 )^2 +(9-6 )^2 }{5-1}}
\\ ~~~~~~~~~~= \sqrt{\frac{50}{4}

}
}$$

Answer 8

I got 3.53

Answer 9

squared?

Answer 10

we are taking the square root, so it isn't squared