We have been given that the standard deviation of a group of 20 scores is 15 and we are asked to find variance.
Since we know variance is square of standard deviation. In order to find out the variance of the given data we have to take the square of 15.
Therefore, our variance is 225.
Answer:
its b Sophocles
Step-by-step explanation:
got it right
Answer:
1204
Step-by-step explanation yes uu28
Step-by-step explanation:
C=y[20]
Cy=[20] Answer is Cy=[20]
Answer:25x=320=12.8
Step-by-step explanation:
a number=x
x*25=25x
25x=320
320/25=12.8
x=12.8