Question

3RD ONE.
For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 20 to the data set?



A.
The mean is decreased by about 0.1 and the median is decreased by 2.

B.
The mean is decreased by about 0.1 and the median is decreased by 3.

C.
The mean is decreased by about 0.15 and the median is decreased by 2.

D.
The mean is decreased by about 0.15 and the median is decreased by 3.

Answer 1

http://static.k12.com/calms_media/media/1417500_1418000/1417693/1/1349366d505f54d9f968044c6fe97ec47facad33/FGA_130917_261016.jpg

Answer 2

What do you think the answer is?

Answer 3

umm...

Answer 4

A?

Answer 5

do the mean without adding the extra 20 and when you get the answer than do it again with the extra 20 and see the difference
and its not A

Answer 6

IDK what the answer is.

Answer 7

its D

Answer 8

how?

Answer 9

When you do the mean without the 20 its 22.56 and when you do it with the extra 20 its 22.41
22.56-22.41=0.15
so it can't be a or b

Answer 10

oh I think I understand

Answer 11

And when you do the mean you get 23 but if you add the extra 20 you get 20
20-23=3

Answer 12

so D

Answer 13

Sorry i'm really horrible at explaining stuff

Answer 14

it's okay

Answer 15

thx

Answer 16

Np