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Unformatted text preview: The SD is 0.5, either from the box 1 or from . 53 . 47. The SE of the number is 400 . 5 = 10. The SE of the percentage is 10 / 400 100% = 2 . 5%. The score is z = (5350) / 2 . 5 = 1 . 2. You can also do z = (212200) / 10 = 1 . 2. The Pvalue is 12%. This is not signicant. We put the dierence down to chance variation. (b) How does your answer change if instead it had landed tails 212 times? It doesnt. Heads and tails are interchangeable in this problem under the assumption that the coin is fair! 1...
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This document was uploaded on 10/29/2011 for the course MATH 127B at Vanderbilt.
 Spring '11
 Staff
 Math, Statistics

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