Transcript Make and Interpret a Frequency Table

Five-Minute Check (over Lesson 7–3)
Main Idea and Vocabulary
Example 1: Make a Frequency Table
Example 2: Make and Interpret a Frequency Table
Example 3: Non-Numerical Data
• I will make and interpret frequency graphs.
• frequency table
Make a Frequency Table
Refer to the table. Make a frequency table of the
data. Then describe the data.
Make a Frequency Table
Step 1 Make a table with
three columns. Label
the columns Number,
Tally, and Frequency
as shown.
Step 2 Use tally marks to
record each data
value. The last
column provides a
count, or frequency, of the data.
Step 3 Describe the data.
Make a Frequency Table
• The median is 2 . Half of the data are above 2
and half of the data are below 2 .
• The mode is 2. More people watch TV for 2 hours
than any other number.
• The range of the data is 5 – 0 or 5. There are no
outliers.
Answer: So, half of the data is less than or equal to
2 hours. More people watch TV for 2 hours
than any other number.
Which of the choices best
describes the data in the
frequency table?
A. More people’s favorite
color is black than any
other color.
B. More than half the people
chose red, green, and pink
as their favorite color.
1.
2.
3.
4.
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C
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B
D. Everyone chose pink as
their favorite color.
A
0%
0%
D
C. No one’s favorite color is
purple.
A
B
C
D
Make and Interpret a
Frequency Table
The table shows the number of hours students in
Mr. Narayan’s class spent on homework last week.
Make a frequency table. Find the median, mode,
range, and any outliers. Then describe the data.
Make and Interpret a
Frequency Table
The least number of
hours spent on homework
is 2, and the greatest
number is 5. So, in the
first column, write the
numbers 2 to 5. Next,
tally the data. Finally, add
the tallies.
The median is the 8th number, or 4 hours. Half of the
data are less than 4 hours and half are greater than
or equal to 4 hours.
Make and Interpret a
Frequency Table
The mode is 4 hours,
since 4 appears more
often than any other
number.
The range is 5 – 2, or
3 hours. There are no
outliers.
Make and Interpret a
Frequency Table
Answer: So, the median is 4, the mode is 4, the
range is 3, and there are no outliers. Half
of the data are less than 4 hours and half
are greater than or equal to 4 hours. More
people study 4 hours than any other
number of hours.
What is the median, mode,
range, and outliers (if any) of
the data below?
A. median 2; mode 2; range 0;
outlier 7
B. median 2; mode 5; range 0;
outlier none
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D
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B
A
D. median 4; mode 7; range 5;
outlier 7
0%
A
B
C
D
C
1.
2.
3.
4.
C. median 2; mode 7; range 7;
outlier none
Non-Numerical Data
The table shows student’s favorite kinds of movies.
Make a frequency table of the data. Then use it to
describe the mode.
Non-Numerical Data
Answer: Since more students chose comedy as
their favorite movie than any other kind,
the mode is comedy.
What is the mode of the data?
A. 3
B. 4
C. 5
1.
2.
3.
4.
D. 7
0%
D
0%
C
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B
A
0%
A
B
C
D
End of the Lesson
Five-Minute Check (over Lesson 7–3)
Image Bank
Math Tool Chest
Use an Appropriate Graph
(over Lesson 7–3)
Draw a line plot for the set of data.
(over Lesson 7–3)
A.
B.
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D
A
B
C
D
B
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A
D.
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C
C.
(over Lesson 7–3)
Find the median, mode, range, and any
outliers of the data shown in the line plot.
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A
B
A. median: 62, mode: 52, range: 13, outlier: 73
B. median: 54, mode: 63, range: 14, outlier: 68
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2.
3.
4.
C. median: 52, mode: 53, range: 21, outlier: 68
D. median: 67, mode: 53, range: 25, outlier: 48
A
B
C
D
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C
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D