Show:
Statistical or Not
Mean, Median, Mode
Range and IQR
Interpret Displays
Box and Whisker plots
100
Is this a statistical question? How many students are wearing Jordan's in this class?
No.
100
What is the mode? 1.06,9.3,59.59,6.01,25.17,1.06,6,1.06,0.7
1.06
100

what is the range 5, 10, 17, 19, 35.3, 34, 56, 7, 1.7

56 − 1.7 = 54.3

100

Look at the Board

(C) 27

100

Find the minimum 5 10 15 20 25

5

200
Should a statistical question have a single answer?
Multiple Answers. Includes typical data
200

What is the median? 93, 47, 37, 49, 25, 12, 13, 57

(37 + 47)/2 = 42

200

what is the median 33, 4, 5, 6, 10, 15, 17, 18, 19, 21 29

17

200

Look at the Board

(D) 22
200

What is the maximum 5 10 15 20 25

25

300
Is this a statistic question? What is the typical favorite sport of Redwood student?
Yes
300

What is the median? 103, 2, 23, 156.5, 105.5, 145

104.25

300

what is the second quartile (Median)? 29 34 39 43 73 91 198

43

300

Look at the Board for the Display:

What is the median?

48

300

What is the first quartile? 1 2 3 4 4 5 6

2

400
IS this a statistical question? Does the Watson Family watch TV?
no
400
Whats the mean? 1, 1, 2, 3, 4, 4, 5, 6, 7, 8
41/10 = 4.1
400

Whats quartile 2 (median)? 35, 49, 53, 69, 69, 77, 84

69

400

Look at the Board for the Display:

What is the interquartile range (IQR)?

24

400

What is Quartile 2 (Median)? 1 2 3 4 5 6

3.5

500
Is this statstical? What is the average weight of 11th grade students in America?
yes
500
What is the average grade for a student who's grades are: 13, 27.3, 69, 69, 23, 97.
49.7
500

Find the IQR of the data set. 30, 45, 46, 72, 78, 89, 99, 100, 100

IQR = Q3 - Q1 = 99 - 45.5 = 53.5

IQR = 53.5

500

 Look at the Board for the Display:
Which statement is best supported by the information in the box plots?

(A) The interquartile range of heights of oak trees is less than the interquartile range of heights of pine trees.

500

What is the interquartile range of the data-set 4, 5, 6, 7, 8, 9, 10

IQR = Q3 - Q1 

= 9 - 5 = 4