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Matched pairs t-tests

Matched pairs t-tests. (x 11 , x 12 , …, x 1n ) (x 21 , x 22 , …, x 2n ). Paired observations  reduced independence of observations Matched pairs t-test. | d |. t test =. s d. S (d i - d) 2. S d =. n. n - 1. Matched Pairs t-tests.

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Matched pairs t-tests

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  1. Matched pairs t-tests (x11, x12, …, x1n) (x21, x22, …, x2n) • Paired observations reduced independence of observations • Matched pairs t-test

  2. | d | ttest = sd S (di - d)2 Sd = n n - 1 Matched Pairs t-tests

  3. Source: http://cdiac.ornl.gov/epubs/ndp/ushcn/state_NC_mon.html

  4. Source: http://cdiac.ornl.gov/epubs/ndp/ushcn/state_NC_mon.html

  5. 2001 is significantly drier than 2000 in central North Carolina.

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