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Presenting the Results of a Contingency Table Analysis_1_

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					Presenting the Results of an
Independent Samples t test
                 Weight Loss
• Those who completed Program A lost significantly
  more weight (M = 22.67 lb, SD = 4.27, n = 6) than
  did those who completed Program B (M = 13.25,
  SD = 4.09, n = 12), t(9.71) = 4.469, p = .001, d =
  2.269, 95% CI [.995, 3.50].
• If you are confident that pounds is a meaning unit
  for your audience, you could present the effect
  size statistics in unstandardized units -- 9.4 lb
  [4.7, 14.1].
                 Sex and IQ
• The mean IQ of girls (M = 101.8, SD = 12.7, n =
  55) did not differ significantly from that of
  boys (M = 99.3, SD = 13.2, N = 33), t(69.7) =
  0.88, p = .38, rpb = .093.
• Since the difference was not significant,
  direction of the effect was not emphasized.
          Sex and Statophobia
• Women reported significantly more fear of the
  course(M = 6.55, SD = 2.16, n = 463) than did
  the men (M = 5.80, SD = 2.59, n = 161),
  t(241.3) = 3.32, p = .001, d = .33, 95% CI [.15,
  .51]
          Red State, Blue State
• The mean income in states that voted for Kerry
  (M = $34,672, SD = 500, n = 20) was significantly
  higher than that of states that voted for Bush (M
  = $28,333, SD = 288, n = 31), t(27.2) = 5.14, p <
  .001, d = 1.65, 95% CI [.99, 2.29]
• If the audience was familiar with the dollar as a
  unit of income, effect size statistics could be
  reported in unstandardized units -- $6,339,
  [$3,881, $8,866].
• Mean IQ was significantly higher in states that
  voted for Kerry (M = 100.95, SD = 1.99, n = 33)
  than in those that voted for Bush (M = 99.26,
  SD = 2.42, n = 55), t(46.1) = 2.72, p = .009, d =
  .75, 95% CI [.16, 1.33].

				
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