Question

http://prntscr.com/j1gxc6

Answer 1

@Vocaloid

Answer 2

be careful, notice how some of the dots are low salary and some are high salary, that means that people aren't necessarily making the same salary

any other ideas based on the graph?

Answer 3

D?

Answer 4

since the dots are distributed randomly instead of a straight line or curve, we would expect *no correlation* between height and salary making A the best choice

Answer 5

http://prntscr.com/j1gywl
dont mind my answer LOL

Answer 6

first add them up and divide by the number of items there are in the list (there are 12 numbers in the list so you would divide the sum by 12)

Answer 7

12.75

Answer 8

good so that's your sol'n

Answer 9

http://prntscr.com/j1h0h4

Answer 10

ok, so there are 21 values, that means the median must be the 11th value, so start counting from the top of the graph until you reach the 11th value, that'll be your median

Answer 11

8 is the 11th value

Answer 12

good but keep in mind to read a stem and leaf plot you have to look at the left-most column to determine the value

since the left most column for that value is 7, the value is 78 = your answer

Answer 13

oh okay gotchu
http://prntscr.com/j1h2xl

Answer 14

keep in mind "less than 30" means anywhere between 0 to 30 so it's not just the green bar, you must add the red, yellow, and green bars together

Answer 15

75?

Answer 16

good so 75 = your answer

Answer 17

almost done:
http://prntscr.com/j1h435

Answer 18

the third quartile is always going to be the right "edge" of the box

Answer 19

49

Answer 20

good

Answer 21

http://prntscr.com/j1h56d

Answer 22

this is kind of a pain to do by hand but you would have to find the median, divide the data sets into two halves based on the median, then find the value of QI (the median of the left half) and Q3: (the median of the right half)

honestly I'd just plug these into a calcultor

http://www.alcula.com/calculators/statistics/interquartile-range/

Answer 23

A little confused lol

Answer 24

manual method:

1. find the median
2. take all the values below the median and find the median of that sub-set (this is the Q1 value)
3. take all the values above the median and find the median of that sub-set (this is the Q3 value)
4. IQR = Q3 - Q1

calculator method:

just type in all the data values into the calculator

Answer 25

It's important to know how to do it manually but to save some time I'd honestly recommend plugging it into the calculator, I end up getting 26

Answer 26

Okay
http://prntscr.com/j1h7pc
one more after this

Answer 27

keep in mind they are at a mall which is where people usually go to buy clothing so they might spend more money on clothing than somebody who doesn't go to the mall, so it would be a biased sample

Answer 28

http://prntscr.com/j1h8m1
last one finally lmao

Answer 29

put them in order from greatest to least and find the value that is in the middle

Answer 30

100,93,89,86,74,72,67,60
86?

Answer 31

whoops, meant to say least to greatest

anyway, I think you missed a few values, the complete list is:

60,67,72,74,74,83,86,86,86,89,93,100

since we have an even # of data points, we take the two in the middle (83 and 86), add them together, and divide by 2 to get the median which ends up being 84.5

Answer 32

ohh ok

Answer 33

and this is correct right?
http://prntscr.com/j1hb36

Answer 34

"middle item" = median, not IQR

Answer 35

Okay thanks Voca!