This document outlines a lesson on sampling and surveys. It discusses different options for obtaining a sample to determine the percentage of registered voters that would vote for a presidential candidate. Option I of calling all registered voters is deemed too tedious, while Option II of calling only 4 voters is deemed unreliable because the sample would not be representative of the total population. The document emphasizes that the sample needs to accurately reflect the population in order to make valid inferences about it.

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Do Now
Module 5: Lesson 10
Homework
4/7/16
Module 2 Packet due tomorrow
Complete Page 45 #3-5

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Mean, there is low variability in the data

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Write your favorite color on a piece of paper and hand it
forward.

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Mr. Tjersland is running for President. You are his campaign
manager and you need to find out what percentage of the registered
voters in the country will vote for him. There are a few things you
could try.
Option I : Call all registered voters on the phone and ask them who
they will vote for.
Although this would provide a very accurate result, it would be a very
tedious and time consuming project. All registered voters represent
the population of interest here, and a better approach would be to use
a sample.
Option II : Call 4 registered voters, 1 in each time zone, and ask them
who they will vote for.
Although this is a very easy task, the results would not be very
reliable. To use a sample to make inferences about a population, the
sample should be representative of the population. How likely is it
that these 4 registered voters would represent the population of all
registered voters? Not very! The sample needs to look just like the
population, but smaller.

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You are a three term senator
from New York. You want to
run for President in 2016.
What do you have to do?

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Brainpop

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Anticipatory Set
Answer the following question in a complete sentence.
1.) Based on our class‛s data of favorite colors, can we assume
that this information is accurate for the entire school? Why or
why not?

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BEFORE YOU LEAVE
1.) Why would it be difficult to obtain data from a random sample of
the population if the United States?
2.) How could you make it easier? What tools would you use?

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