Mean
Median
Mode
Two-Way Tables
Box and Whisker Plots
100
Find the mean:
5, 6, 7, 8, 9
Mean = 7
100
Find the median:
1, 2, 3, 4, 5, 6, 7
Median = 4
100
Find the mode(s):
1, 2, 3, 2
Mode(s) = 2
100
Check Document
(How many 7th graders were surveyed?)
62
100
Find the maximum value:
Maximum = 28
200
True or False:
The mean and median are always the exact same number in any data set
False
200
How do you find the median when there are two middle numbers in the data set?
Find the mean (average) of the two numbers
*Add the two numbers together and divide by 2*
200
True or False:
A data set can have no mode
True
200
Check Document
(Relative Frequencies)
57/78 = .73 21/78 = .27 1.00
13/22 = .59 9/22 = .41 1.00
1.00 1.00 1.00
200
What term is used to describe the number range inside the box on a box and whisker plot?
(Q3 – Q1)
Interquartile Range
300
Find the mean:
12, 1, 13, 18, 23, 12, 14, 14, 1,
Mean = 12
300
Find the median:
2, 3, 5, 3, 4, 3, 2, 3, 2, 3, 5
Median = 3
300
Find the mode(s):
1, 2, 3, 4, 5, 4, 3, 4, 2, 1
Mode(s) = 4
300
Check Document
(Create a Two-Way Table)
44 34 78
13 9 22
57 43 100
300
Find the value of Q3:
Q3 = 8
400
Two students, Bob and Marley, try to find the mean for the following data set:
0, 1, 2, 3, 4
Bob says that the mean of the data set is 2.5, Marley says the mean is 2.
Which student that is correct?
Identify the other student's mistake.
Correct = Marley
Mistake = Bob divided by 4 instead of 5
400
True or False:
There is always a median of a data set
True
400
Two students, Billy and Joel, are trying to find the mode for the following data set:
1, 1, 3, 3, 4, 4, 6, 7, 6,
Billy says that there are multiple modes, 1, 2, 4, and 6. Joel says the mode is 1.
Which student is correct?
Correct = Billy
400
Check Document
(Find / interpret marginal frequencies)
290 people own a cat, 306 people do not own a cat
312 people own a dog, 284 people do not own a dog
596 total people were surveyed
400
What does the middle bar (Q2) represent in every box and whisker plot?
Middle (Q2) = Median
500
Find the mean:
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4.7
Mean = 3.141
500
Find the median:
53, 32, 35, 78, 65, 56, 43, 32, 45, 12, 19
Median = 43
500
Find the mode(s):
300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335
Mode(s) = 316
500
Check Document
(Percentage comparison)
8/60 = .13
3/60 = .05
Brown hair with blue eyes is higher
500
Find the five-number summary of this box and whisker plot:
Minimum = 250
Q1 = 400
Median = 500
Q3 = 560
Maximum = 720