Answer:
D) Standard deviation is 5.41
Step-by-step explanation:
We are given
count N = 9
Sum ∑xi = 113
Mean = ∑xi /N = 12.55
Standard deviation = where i = 1 to 9
upon substituting the values we get
Standard deviation = = 5.41
free
9514 1404 393
1/2
The rules of exponents are helpful.
(a^b)^c = a^(bc)
a^-b = 1/a^b
__
Also draw the figure and from the above solu. it is prooved that ABCD is a kite