# Download 15C - PowerPoint - Boxplots and Histograms - Day 2

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```Problem Solving and Data Analysis
15 – Boxplots and Histograms
Day 2
Calculator Required
Entrance Slip Discussion
Below are the ages of the first twenty winners of the Academy Award for Best Actress. Use these values to
22
29
24
30
25
30
26
31
26
32
27
35
27
37
28
38
1. How many of these values are in the range of 20 to 29 (inclusive)?
11
2. How many of these values are in the range of 30 to 39 (inclusive)?
7
3. How many of these values are in the range of 40 to 49 (inclusive)?
1
4. How many of these values are in the range of 50 to 59 (inclusive)?
0
5. How many of these values are in the range of 60 to 69 (inclusive)?
1
28
40
29
63
Entrance Slip Discussion
Below are the ages of the first twenty winners of the Academy Award for Best Actress. Use these values to
22
24
25
26
26
27
27
28
28
29
29
30
30
31
32
35
37
38
40
63
The same information can be organized in a histogram.
Histogram
Collection 1
12
First 20 Best Actress Winners
10
Count
8
6
4
2
20
30
40
50
60
Age
1. How many of these values are in the range of 20 to 29 (inclusive)?
2. How many of these values are in the range of 30 to 39 (inclusive)?
3. How many of these values are in the range of 40 to 49 (inclusive)?
4. How many of these values are in the range of 50 to 59 (inclusive)?
5. How many of these values are in the range of 60 to 69 (inclusive)?
11
7
1
0
1
70
Entrance Slip Discussion
Below are the ages of the first twenty winners of the Academy Award for Best Actress.
22
29
24
30
25
30
26
31
26
32
27
35
27
37
28
38
28
40
29
63
Histogram
Collection 1
12
First 20 Best Actress Winners
10
Count
8
6
4
2
20
30
40
50
60
70
Age



The boxes (called bins) on the horizontal axis represent an age range for the actresses.
The two 30 year old winners are in the second bin. The 40 year old winner is in the third bin. The number
on the left side of each bin is included in that bin.
The height of each bar is determined by the number of actress who fell within the specific range.
The histogram below shows the number of vehicles that a car rental agency currently has available to rent,
categorized by fuel efficiency ratings.
C
B
A
D
The bins of the histogram have been labeled A, B, C, and D. For each value below, identify the bin in which the
value lies. If the value does not belong in any of the bins, select ‘none of these’.
12
A
B
C
D
none of these
27
A
B
C
D
none of these
15
A
B
C
D
none of these
30
A
B
C
D
none of these
18
A
B
C
D
none of these
32
A
B
C
D
none of these
20
A
B
C
D
none of these
35
A
B
C
D
none of these
23
A
B
C
D
none of these
37
A
B
C
D
none of these
25
A
B
C
D
none of these
The histogram below shows the average life span (rounded to the nearest year) for a variety of animals.
Histogram
Collection 1
Animal Life Span
10
Count
8
6
4
2
10
15
20
25
30
1. Between which two ages did most of the animals fall?
35
LifeSpan
40
45
50
55
60
Between 20 and 24 inclusive
2. How many animals could have had a life span of exactly 33 years? Zero. It is an empty bin.
3. How many animals could have had a life span of exactly 37 years? There could be zero or one.
4. How many animals could have had a life span of exactly 40 years?
There could be zero, one, or two.
5. What is the shortest life span possible for this collection of animals? 10 years
6. What is the longest life span possible for this collection of animals?
59 years
From a histogram, we cannot say exactly what the minimum or maximum values of a data set are.
The cost of each house in New Mexico is summarized in the histogram below. Houses that are worth more than
1 million dollars are not shown due to space limitations.
The most expensive houses
are not included.
We cannot find the maximum.
We cannot know the exact
maximum value from the
histogram either. We only know
that the maximum is somewhere
between 950 thousand (inclusive)
and 1,000 thousand (exclusive).
Above 1 million dollars, the number of houses continues to decrease steadily as the cost increases. What is the
range of the house costs?
A.
B.
C.
D.
0
150 thousand
1,000 thousand
There is not enough information to determine the range.
The histogram below summarizes the Flesch grade equivalent (a readability statistics in which each value has
one decimal place) for the Newberry award-winning books from 1922 to 1993.
There are a total of 72 data
points.
The median would be
between the 36th and 37th
values.
These values occur in the
third bin.
Select All That Apply – Which of the following values could be the value of the median?
A. 5.5
B. 6
C. 6.5
D. 7
E. 7.5
```
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