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Stats tute 2

# Stats tute 2 - Question 3.8 A page 37 The relationship...

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Question 3.8 A page 37 The relationship between dominatn hand reaction time and age for a sample of 219 is shown in figure 1 above. There is no significant linear relationship between age and dominant hand reaction time (r=.111, p= .100). A power analysis was perfromed. (NOW LOOK AT TABLE AT THE BACK OF ORANGE BOOK). With a sample of 219 we can be at least 81% confient of detecting correltations as weak as 0.2 if they exist. If a realtionship does exist in the population we are confident it is extremely weak.

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Qestion 3.8B (DO NOT include in prestentation) Correlations age Employment hours (paid) age Pearson Correlation 1 .561 ** Sig. (2-tailed) .000 N 221 158 Employment hours (paid) Pearson Correlation .561 ** 1 Sig. (2-tailed) .000 N 158 158 **. Correlation is significant at the 0.01 level (2-tailed). r = .561 p = .000 but should be written in report as… p< .001 n = 158 Employment hours = -2.345 + 939 x age In a sample of 158 people there is a significant moderate linear relationship between age and employment hours as shown in figure 1 above (GRAPH) (r=.561, p<.001). Older people tend to have a greater number of employment hours. On average for every extra year in age we predict an extra .9 hours employment.
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