Math153, 4/06 Name: ______________________________
Project Extra credit 3: (10
points) Submit this paper.
Due: on
or before Friday, April 21, 2006.
Go to the reading list for Math153 – Janice Dykacz
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Dr. Janice Dykacz Math153
1. Read the article on the Baltimore Sun regarding polls (Item 2. Testing Polls Baltimore Sun, 9/12/04 Perspective section of newspaper). You may print a copy for yourself from a college printer. (Click on print to the left.)
2. We read the following sentence in the article.
“Smith explains it another way: you don’t have to eat a pot of soup to know what it tastes like; a spoonful will usually do.”
What do you think about this analogy?
3. Verify that a
poll with n=1000 will have a 3% margin of error. Assume 
= 0.5. Assume you will be finding a 95% confidence
interval. SHOW ALL WORK.
4. If you wanted a poll to have a 1% margin of error, what sample size would be needed? Assume
= 0.5. Assume you
will be finding a 95% confidence interval.
SHOW ALL WORK.