In the UN Human Development Report, one variable measured was x = percentage of adults who use
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In the UN Human Development Report, one variable measured was x = percentage of adults who use contraceptive methods. Table 9.11 shows part of a regression analysis using y = fertility (mean number of children per adult woman), for 22 nations listed in that report. For those nations, x had a mean of 60.0 and standard deviation of 20.6.
(a) State a research question that could be addressed with this output.
(b) Report the prediction equation and find the predicted fertility when (i) x = 0, (ii) x = 100. Show how the difference between these can be obtained using the slope.
(c) Find and interpret r and r2.
(d) What do your analyses say about the question in (a)?
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