Question

80 72
85 90
87 85
92 84
86 91
90 78
94 94
100 86
75 82
45 78
85 86
38 78
72 95
94 90
62 88
@Directrix

Answer 1

i have to make a box and whisker plot for these but i dont know how to find the quartiles and stuff i need two different ones

Answer 2

dont you find the median then find the median on the left and right side then leave out the outliers

Answer 3

There is an online boxplot maker but I have found that it messes up the quartiles so I don't use it.

>>>>> dont you find the median then find the median on the left and right side then leave out the outliers

Yes.

How many data points are in each set?

Answer 4

15

Answer 5

We need the data points of each set in ascending order (low to high)

Answer 6

so check my work my median is 85 my first quuartile is 72 and my third one is 92

Answer 7

I have to put the numbers in increasing order before I can crank out anything.

Answer 8

38,45,62,72,75,80,85,85,86,87,90,92,94,94,100

Answer 9

Okay. Now I can pick up some speed.

Answer 10

im pretty sure 38,45 are the outliers

Answer 11

38 ,45 ,62, (((( 72 )))) ,75, 80 ,85 ((,85)) ,86, 87, 90 ((((,92,)) 94 ,94, 100

Median 85 and Q1 72 and Q3 92

Is that what you got?

Answer 12

yes

Answer 13

now my minium point would be 62 and my max would be 100 correct?

Answer 14

and my outliers 38 and 45

Answer 15

First data set has upper extreme of 100 and lower extreme of 38

Answer 16

38 isnt an outlier?

Answer 17

Extremes are not necessarily outliers.

Answer 18

You are working ahead of me. I'm still on Data Set 1.

Answer 19

me to

Answer 20

What process do you use to get the outliers?

Answer 21

idk i thought you subtracted the 100-38 and that would be the differnetial and if its bigger than that than its an outlier

Answer 22

I use the 1.5 times the IQR approach (Inter Quartile Range)

Answer 23

which would mean there is no outliers

Answer 24

What is Q3 - Q1?

Answer 25

20

Answer 26

20x1.5 is 30

Answer 27

What is Q1 - 30

Answer 28

42

Answer 29

so 38 is an outlier.

Answer 30

Are there any data points BELOW 42

Answer 31

38

Answer 32

38 is an outlier, then.

Answer 33

What is Q3 + 30

Answer 34

122 so no outliers

Answer 35

Okay. So, just the one outlier.

Will you post Data Set 2 in increasing order?

Answer 36

72,78,78,78,82,84,85,86,86,88,90,90,91,94,95

Answer 37

Median: 86 Q1:78 Q3:90

Answer 38

with no outliers

Answer 39

72 ,78 ,78, ((((78)))) ,82 ,84 ,85 (((,86))) ,86 ,88 ,90 (((,90))) ,91 ,94, 95

Q1 = 78, Q2 = 86, Q3 = 90

Answer 40

and the IQR difference is 18 so there is no outliers

Answer 41

IQR = ?

Answer 42

12

Answer 43

1.5 * 12 =

Answer 44

time 1.5 so 18 so no loutliers

Answer 45

Q1 - 18 =

Answer 46

60

Answer 47

Any data points below 60?

Answer 48

nope

Answer 49

Q3 + 18 =

Answer 50

108

Answer 51

Any data points above 108

Answer 52

nope

Answer 53

So, no outliers for set B.

Answer 54

okay no more questions on this part but i got follow up questions for this if you dont mind helping

Answer 55

80 72 100
85 90 90
87 85 94
92 84 100
86 91 75
90 78 30
94 94 94
100 86 72
75 82 85
45 78 87
85 86 42
38 78 100
72 95 90
94 90 94
62 88 60 same thing but the last row is class C

Answer 56

• Part 1: Make a dot plot for each of Classes B and C.
• Part 2: What information is easily seen from the dot plots for Classes B and C?
• Part 3: Look at the box plot and dot plot created for Class B. What are the strengths and weaknesses of each type of plot?
• Part 4: Which of the two classes (B or C) performed better on the test? Justify your conclusion.

Answer 57

Do you have to make a box plot for class C?