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Make Predictions abouta Population 3/26/15 Page 95
DO NOW: The circle graph shows the results of a survey
of 500 college students about their preferred Spring
break destination. Of these 500 students, how many
students preferred Cancun?
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Spring Break Dÿstinations
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Choice
Relative
Frequency
Decimal
(Percent)
Pumpkin
25"- toÿ
Cherry
?ÿ'ÿ "ÿo0
19%
Daytona
\
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Apple
z,r
i 12%
Cancun
Peach
\
7. C
24%
17%
Miami
South Padre
Island
l o ÿ X.';
.fuo
Peca n
Pÿ
=F /'J
Create a Circle Graph
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A sample isÿselection taken from a larger group (the
"population") so that you can examine it to find out
something about the larger group.
To save time and money, you will survey a sample or
part of the group.
Take a sample of twenty-five random students
about their favorite type of pie.
Choice
Frequency Fraction
Pumpkin
)/
2S
Cherry
3
f
Apple
Z
Peach
Pecan
Hÿ
S
)
A survey of students' favorite sports was taken
from a random sample of students in a school.
Use the percent equation to help you solve.
The results are shown in the table.
5. A survey showed that 74% of a nursery's mail-order
customers spent more than $100 on plants each
spring. Predict how !!ÿam/of 125,000 mail-order
Students' Favorite
customers will spell 00 on pJÿants next
Sports
spring.
Soccer
8
Baseball/Softball
3
Volleyball[
5
Track & Field
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1. What is the size of the sample? Z
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2. What is the probability that a student will prefer
soccer?
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3. What is the probability that a student will prefer
volleyball?
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Zÿ v°
6. A survey of high school students with jobs asked'} ÿ ÿ" oO
whether the students saved some of the money they
earned. 84% of the students said they saved some
money. Out of 375 students, predict how many
would save some of their earnings.
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7. A survey showed that 55% of a travel company's
customers were planning an overseas vacation the
following year. Predict how many of the travel
company' s 12,400 travelers will vacation overseas
the following year.
4. There are 550 students in the school. Predict how
many students at the school prefer track and field.
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