Sampling Techniques - PCHS...
Transcript of Sampling Techniques - PCHS...
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Sampling Techniques
Let’s review the different kinds of
sampling methods you talked
about in your groups.
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Methods
Random
Stratified
Cluster
Convenience
Systematic
Voluntary Response
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Determine the type of sampling
method used in each scenario.
The Ontario government randomly selects
five high schools in Ontario and surveys
each teacher in those schools.
Cluster sampling
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What is the best sampling technique to
use for determining the average speed
of the cars on a section of highway?
a)Simple random sample
b)Systematic sample
c)Convenience sample
d)A or B
D
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You choose every 100th name
from a phone number directory.
Systematic
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Every 10th person entering PC is asked
the number of AP classes they are
enrolled in.
Systematic
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5 math classes on the 3rd floor are
chosen and each child in each class is
surveyed.
Cluster
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A researcher randomly selects 50
female and 50 male teachers in his
study of technology in the classroom.
Stratified
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A researcher from an airline
interviews all the passengers on flights
traveling to the southeast.
Cluster
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Every twentieth family attending
PCHS open house is surveyed.
Systematic
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At a small community college, a student
surveyed everyone in her biology class to
determine the percentage of students who
own a car.
Convenience
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All of the teachers from schools in
Fuquay-Varina are chosen for a
survey.
Cluster
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To avoid working late, a quality control
specialist checks the last 10 widgets
manufactured.
Convenience
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Based on 10,000 surveys received from 35,000
sent to a city, the governement was able
to determine what kinds of cars people
have.
Voluntary Response
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A market researcher randomly selects 50
participants over 50 years old and 50
participants less than 35 years old.
Stratified
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At a women’s brunch, each name is
placed in a bin. Every 30 minutes a
name is chosen.
Random
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Jonathon randomly selects three
cards from a standard deck of
cards.
Random
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In a town of 120,000 people, smoking has been banned in all restaurants. A committee of students wants to find out what the whole town thinks of this new law. The committee wants to survey 1,500 people. Which sampling technique is most appropriate? Why?
*Talk in your groups