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anonymous
 one year ago
For the data shown in the stemandleaf plot, what is the effect on the mean and median of adding the value 10 to the data set?
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
anonymous
 one year ago
For the data shown in the stemandleaf plot, what is the effect on the mean and median of adding the value 10 to the data set? 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

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phi
 one year ago
Best ResponseYou've already chosen the best response.1Can you count how many numbers are in your "leaf plot" ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1now count, starting from the top, until you get to number 8 can you do that ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes, but that "0" by itself is short for a number. the key tells you how to figure out the number. can you do that ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes, 2, and the "0" means your number is 20

phi
 one year ago
Best ResponseYou've already chosen the best response.1next, what is the 9th number? (one past the 8th number) ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1so what is the 9th number ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1not just 6. remember to "tag on" the key number

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. the "median" is the middle number. when we have 16 numbers, 8 numbers are below the median and 8 are above it. to find the median we find the average of the 8th number 20 and the 9th number 26 in other words, the median is (20+26)/2 = what ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. 23 is the median of that data. now to answer the question median of adding the value 10 to the data set? we have to add "10" to the data , and then find the median of those numbers.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0honestly... i'm a little confused.

phi
 one year ago
Best ResponseYou've already chosen the best response.1to "put 10" into your data you put a 0 in the row with 1 as the "key" number. the 0 goes in front of the other numbers. The 0 goes before 2 5 8

phi
 one year ago
Best ResponseYou've already chosen the best response.1Here is an example, with the 0 in red

phi
 one year ago
Best ResponseYou've already chosen the best response.1now we find the median. Because we added an extra number, we now have 17 numbers the median is the middle number: 8 below the median, 9th number is the median, 8 numbers above. in other words, start at the top and count until you get the 9th number. (don't leave out the 0 we added)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is the 9th number 20? 0 2^

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes. and that is the median of the new data set so we first got 23 as the median now we get 20 as the median the median went down by 3

phi
 one year ago
Best ResponseYou've already chosen the best response.1which of the choices *might* be the answer ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1what does choice D say about the median (I can't read it)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The mean is decreased by about 1.2 and the median is decreased by 3.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i'm trying to figure out the mean, but i don't know.

phi
 one year ago
Best ResponseYou've already chosen the best response.1so the answer might be B or D (but not A or C) to decide, we need to find the mean (the average) of the 16 numbers that is a bit painful. Do you know how to do that ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1you make a list of the numbers by "tagging on" to the front, the key number

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i know the simple way lol. add up all the numbers and divide by the amount of numbers. (total divided by 16)

phi
 one year ago
Best ResponseYou've already chosen the best response.1that is how you do it. but first we need to write the numbers 06+08+12+15+18+ etc

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i think the total is 61

phi
 one year ago
Best ResponseYou've already chosen the best response.1it is more than that. what are the 16 numbers you are using ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1remember the "chart" they show you is using a short cut to write the numbers the first 5 numbers are 06+08+12+15+18 do you see how I got those ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1the first two I got from 0  6 8 which is "short" for 06 08

phi
 one year ago
Best ResponseYou've already chosen the best response.1then the next 3 I got from 1  2 5 8 which is short for the numbers 12 15 18 and we want to add them up, so the first 5 numbers added together are 06+08+12+15+18 but we need the rest of the numbers.

phi
 one year ago
Best ResponseYou've already chosen the best response.1what are the numbers you get from the 3rd row ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.010, 10, 10, 16 , 18 and 19

phi
 one year ago
Best ResponseYou've already chosen the best response.1almost. but you put a 1 in front. You should be the "key number" in front

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so... 20, 20, 20, 26, 28, 29?

phi
 one year ago
Best ResponseYou've already chosen the best response.1yes, and finally the last row

phi
 one year ago
Best ResponseYou've already chosen the best response.1the last row starts with 3  use the "3" (not a 2)

phi
 one year ago
Best ResponseYou've already chosen the best response.106+08+12+15+18+20+20+20+26+28+29+30+31+32+32+34 then divide by 16

phi
 one year ago
Best ResponseYou've already chosen the best response.1when we add 10 the sum goes from 361 to 371 and the average of the 17 numbers is 371/17=

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, so would the answer be D?

phi
 one year ago
Best ResponseYou've already chosen the best response.1the old mean is 22.5625 the new mean (after adding in 10) is 21.8235 the new mean went down by 22.56  21.82 = 0.74

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i was wrong, the answer is B

phi
 one year ago
Best ResponseYou've already chosen the best response.1Yes, choice B is closest. it says the mean goes down by about 0.7

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, thank you sooooo much. i would have figured it out on my own! :D :D :D :D :D :D :D :D

phi
 one year ago
Best ResponseYou've already chosen the best response.1This problem was a lot of work. Good job.
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