Definitions
Mean, Etc.
Median and Mode
Range and IQR
Miscellaneous
100
The difference between the largest and the smallest values
What is range?
100
Find the mean.
13, 18, 13, 13, 14, 21, 13
What is 15?
100
Find the median and mode:
13, 18, 13, 14, 13, 16, 14, 21, 13
median: 14
mode: 13
100
Find the range.
Ages of Animals (years)
13, 18, 13, 14, 13, 16, 14, 21, 13
What is 8 years?
100
Is this a statistical question? Explain.
How many shoes do you have?
Yes, it is a statistical question. It has more than one correct answer. If you ask more than one person, you're going to get more than one answer.
200
The value that occurs most often
What is mode?
200
Find the mean.
8, 9, 0, 7, 0, 8
What is 5.3 or 5 1/3?
200
On a state licensing test, Jean and her friends got the following scores: 65, 78, 63, 78, 97, 42, and 53. What was their median score?
What is 65 points?
200
Find the range and IQR of this data.
Number of M & M's in a package.
12, 13, 13, 15, 10, 11, 11, 11, 10, 9
Range: 6 M & M's
IQR: 3 M & M's
200
What is the shape of the plot. What percent of the rebounds were 5 or more? 
skewed right
75%
300
First, list the numbers in numerical order. Find the middle number. If there are two middle numbers, find the middle of the two numbers.
What is median?
300
Craig has 4 apple trees in his backyard. The first three trees have 34, 29, and 36 apples. Find the number of apples on the fourth tree if the mean is 35 apples.
41 apples
300
Name the 5 number summary for this box and whisker plot. Give the name of the point with its number.
minimum or lower extreme: 0 years
first quartile or lower quartile: 3 years
median: 5 years
third quartile or upper quartile: 8 years
maximum or upper extreme: 12 years
300
Find the range and the interquartile range. 
Range: 81 years
IQR: 28.5 years
300
The data shows Casey's scores for the past 5 math tests. Identify the outlier.
88, 55, 89, 91, 86
How will the outlier affect her mean score?
55
It will make her mean lower.
400
Name two types of graphs that are useful for large amounts of data.
large amounts of data:
box and whisker plots, histograms
400
Find the five number summary.
minimum: 65
first quartile: 81
median: 88
third quartile: 94
maximum: 98
400
Find the median and mode.
Median: 4 points
Mode: 3 points
400
Find and interpret the range and IQR.
Range: 80-20= 60 inches
The distances vary by no more than 60 inches.
IQR: 70-30 = 40 inches
The middle 50% of the distances vary by no more than 40 inches.
400
Describe the shape of the histogram. How many runners ran less than three miles?
skewed left; 20 runners
500
Add up the set of numbers and divide by the total number of values
What is mean?
500
10, 10, 11, 20, 20, 20, 25, 25, 28, 40, 40, 48
Find the mean, median, and mode.
Which measure of center is the best representation of the data?
mean: 24.75 books
median: 22.5 books
mode: 20 books
The mode and median are a bit too low and don't represent the higher numbers. The mean is the best representation because it represents the lower numbers and the higher numbers.
500
69, 87, 88, 88, 89, 90, 96, 97, 97, 100
Find the median, mode, mean, and range of the data.
median: 89.5 years
mode: 88, 97 years
mean: 90.1 years
range: 31 years
500
Find and interpret the range and the interquartile range.
Range: 6 years
The data varies by no more than 6 years.
Interquartile Range: 3 years
The middle 50% of the data varies by no more than 3 years.
500
Scientists measured 120 trees and graphed the data on the histogram below.
What fraction of the trees are between 150 and 200 cm tall?
30 out of 120
30/120 = 3/12 = 1/4