Numerical vs. Categorial Data and Absolute Deviation
Histograms
Dot Plots
Mode and Range
Mean and Median
100
If you surveyed the class, would this question provide numerical data or categorical data?
What is your favorite type of music?
Categorical data
100
What is the most common age group?
16-20
100
Describe the spread of this dot plot.
This dot plot has a large spread.
100
What is the range:
3,4,5,6,8,9
6
100
Find the mean of this set. Round to the nearest tenth.
3, 5, 7, 7, 8, 8, 8
Mean: 6.6
200
Write an example of a question that would give you numerical data if you surveyed the class.
Any question that provides an answer that is a number.
Example: How many hours did you sleep last night?
200
The histogram below represents peoples test scores. How many people took the test?
18
200
What is the center of this dot plot?
6
200
What is the range of this set:
3, 10, 4, 20, 8, 2, 6
18
200
Find the median of this set:
3, 4, 10, 5, 6, 1, 8, 2, 1
Median: 4
300
The dot plot shows the number of hours people exercise per week. If the mean is 2.5 What is the absolute deviation of data point 9.
6.5
300
True or False? This histogram can tell you how many 48-year-olds won the lottery.
False. We know 6 people in the 40-49 age range won the lottery, but we don't know their exact age.
300
What is the center of this dot plot? 
31.5
300
What is the mode of this set:
9, 6, 4, 9, 7, 6, 4, 9, 7, 8, 9
9
300
Find the mean and median of this set. Round to the nearest tenth.
3, 4, 5, 6, 7, 8, 10
Mean: 6.1
Median: 6
400
Six students were asked how long they spend reading for pleasure each week. Here is how they responded:
1 hr, 1 hr, 3 hr, 5 hr, 2 hr, 0 hr
Find the mean, then determine the absolute deviation of data point 0.
Mean: 2 hours
Absolute Deviation of data point 0: 2 hours
400
How many lottery winners were at least 60 years old?
9
400
Which dot plot shows more consistent scores?
Friend's Basketball Scores
400
What is the mode of this set:
3, 4, 5, 6, 7, 10
No Mode
400
What is the mean, and median of this set:
1, 2, 3, 2, 2, 2, 1, 3
Mean: 2
Median: 2
500
Find the mean. Then determine the absolute deviation of data point 3.
Mean: 2
Absolute Deviation of Data Point 3: 1
500
True, false, or not enough information? All of the lottery winners were at least 21 years old.
Not enough information. We know 2 people in the 20-29 age range won the lottery, but we don't know their exact ages.
500
Find the center of the dot plot AND describe the shape.
Center: 6
The dot plot looks like two mountains or two triangles.
500
What is the mode of this set:
4, 3, 7, 8, 4, 6, 6, 6, 7, 4
4 and 6
500
Find the mean and median of this set. Round to the nearest tenth.
45, 30, 20, 50, 23, 19
Mean: 31.2
Median: 26.5