Measures of Center
Measures of Variation
Appropriate Measures
Graphs
100
Find the mode of: 10, 20, 15, 11
What is there is NO MODE.
100
Find the range of: 10, 6, 11, 14, 25, 13
What is 19?
100
Which measure is most affected by an outlier?
What is mean?
100
Which graph shows frequency of data divided into equal intervals?
What is histogram?
200
Find the median: 8, 22, 15, 11, 10
What is 11?
200
Name any outliers: 10, 37, 42, 38, 75, 40, 33
What is 10 and 75?
200
When do you use the mean vs. the median for "choosing appropriate measures"?
Mean = When the data distribution is symmetric
Median = When the data distribution is skewed
200
What is the label for the vertical axis in a histogram?
What is frequency?
300
Find the median and mode: 25, 16, 18, 16, 24, 30
What is median 21 and mode 16?
300
Find the first and third quartiles : 12, 10, 14, 16, 8
What is Q1 = 9 and Q3 = 15?
300
Find the mean and standard deviation.
22, 14, 22, 14, 20, 30, 40, 50, 45, 60
Mean: 31.7
Standard Deviation: 16.11
300
Which graph allows you to calculate the IQR easily?
Box and whisker plot
400
Find the mean of: 10, 15, 22, 30, 45
What is 24.4?
400
Find the interquartile range: 10, 6, 22, 12
What is IQR = 9?
400
Find the median and IQR of : 30, 40, 20, 100, 400
median: 40
IQR: 225
400
Which graph allows you to analyze the data distribution in intervals of 25%?
Box and whisker plot
500
Mrs. Coussens bowled 150, 148, 177 and 184. If she wants to average exactly 172, what must she bowl on the next game?
What is 201?
500
Thinking of the 5-number summary, find the measures of variation.
17, 52, 22, 43, 41
IQR = 28 and Range = 35
500
Find the mean with and without the outlier:
50, 60, 70, 80, 200
What is mean with outlier = 92?
What is mean without outlier = 65?
500
Describe the distribution of the three histograms, A, B and C below.
below.
A: Skewed Right
B: Skewed Left
C: Symmetric