Question

For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 10 to the data set?

06,08,12,15,18,20,20,20,26,28,29,30,32,32,32,
34
A.The mean is decreased by about 0.7 and the median is decreased by 2.

B.The mean is decreased by about 0.7 and the median is decreased by 3.

C.The mean is decreased by about 1.2 and the median is decreased by 2.

D.The mean is decreased by about 1.2 and the median is decreased by 3.

Answer 1

So the first thing you have to do here is find the mean and median for the data set as it is now, before you add 10. Do you recall what mean and median are?

Answer 2

median is the middle number and mean is sum divided by n

Answer 3

Right. So what is the mean and median for the set as it is?

Answer 4

i think the answer is d

Answer 5

Would you like me to check it?

Answer 6

ok

Answer 7

Yup you're right!

Answer 8

Please close this question :)

Answer 9

thanks