Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

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Poll a group of voters several times. Will the results always be the same?

Webster Fletcher has been very impressed with your work for Stephanie Higgins -- so impressed, in fact, that he has stolen you away from Higgins. You have now taken a job as Fletcher's chief pollster.

It's midway through the campaign and Fletcher is concerned about how female Republicans are planning to vote. Fletcher, having been in politics for quite a while, knows that polls assume that voters in the same demographic group will all vote the same way. He also knows that is not always true.

To provide Fletcher with a look at the data he needs, you are going to conduct three telephone polls of Republican women in the city. Each time, you will call a different group of these women and ask them:

"Who will you vote for in the mayoral election?"

Are you Ready to Go to Work?

1. Read Webster Fletcher's political profile 3. Conduct your first telephone poll. To select a random sample, you need to choose a increment to base your sample on. Whom would you like to call?

Every 3rd person
Every 5th person
Every 9th person
Every 15th person

[Back to What is a Margin of Error?]

"Statistics" is inspired by programs from Against All Odds: Inside Statistics,
a video series in the
Annenberg Media Multimedia Collection.