(A)
we are given
we can use vertical line test
If the vertical line intersects at two points
then this is not the function
because a function can not have two outputs for same input
we get graph as
so, this is not function
(B)
we are given
we can use vertical line test
If the vertical line intersects at two points
then this is not the function
because a function can not have two outputs for same input
we get graph as
so, this is not function
A researcher analyzed the results of her data and calculated the standard deviation of scores at 3.5. what is the variance?
Solution: We are given the standard deviation of scores = 3.5
We know that the variance is the square of the standard deviation.
Therefore, the variance is:
Therefore, the variance of the scores is 12.25