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Unformatted text preview: . Matched pairs is a special test when we are comparing corresponding values in data. This test is used only when our data samples are DEPENDENT upon one another (like before and after results). Matched pairs t – test assumptions: 1. Each sample is an SRS of size n from the same population. 2. The test is conducted on paired data (the samples are NOT independent). 3. Unknown population standard deviation. 4. Either a normal population or large samples ( n ≥ 30 ). Example: 15. A new law has been passed giving city police greater powers in apprehending suspected criminals. For six neighborhoods, the numbers of reported crimes one year before and one year after the new law are shown. Does this indicate that the number of reported crimes have dropped? Neighborhood 1 2 3 4 5 6 Before 18 35 44 28 22 37 After 21 23 30 19 24 29...
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This document was uploaded on 02/26/2014 for the course MATH 2311 at University of Houston.

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