Question

For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 30 to the data set?



A.
The mean is increased by about 0.4 and the median is increased by 3.

B.
The mean is increased by about 0.4 and the median is increased by 4.

C.
The mean is increased by about 0.6 and the median is increased by 3.

D.
The mean is increased by about 0.6 and the median is increased by 4.

https://static.k12.com/calms_media/media/1417500_1418000/1417693/1/1349366d505f54d9

Answer 1

find the mean of just the data given in the picture you posted, what do you get?

Answer 2

idk

Answer 3

no problem, I'll show you ^_^

Answer 4

ok thanks

Answer 5

The first row becomes the numbers: 6 and 8 the 2nd row becomes the numbers: 12, 15, 18 3rd row: 20, 20, 20, 26, 28, 29 4th row :30, 31, 32, 32, 34 got it?

Answer 6

yea now whatt?

Answer 7

now to find the the median I count in from both sides, so 6 and 34 are paired 8 and 32 are paired 12 and 32 are paired 15 and 31 are paired, keep counting in until you are at the same number, what do you get?

Answer 8

ummm idk how do u count em likle add em?

Answer 9

Yes

Answer 10

up add em up?

Answer 11

Yes

Answer 12

i got 170

Answer 13

so here are the number in order: 6, 8, 12, 15, 18, 20, 20, 20, 26, 28, 29, 30, 31, 32, 32, 34 if I count in 8 numbers from the left I'm at 20 if I count in 8 numbers from the right i"m at 26 do you see it?

Answer 14

oh yea i did the adding way wrong

Answer 15

now what do we do?