13. The following data on fertility rates were obtained from Eurostat on seven E

Question

13. The following data on fertility rates were obtained from Eurostat on seven European countries in 2006. Suppose you obtain the following equation which predicts the total fertility rate using information on the mean age of childbearing: Y-9.34+ -0.25x. What is the predicted total fertility rate for a country with a mean age at childbearing of 31.5 years? Why would it be inappropriate to predict, say, the TFR for a country with a mean age at childbearing of 22.7 years? Mean Age at Childbearing Total Fertility Rate Denmark Irelan Greec Spai Franc 30.29 30.66 29.87 30.88 29.72 30.87 30.58 1.83 1.90 1.39 1.38 2.00 1.32 1.70 Italy Netherlands Mean 30.4 1.65

Explanation / Answer

Reg eq is

total fertility rate=9.34-0.25(mean age of childbearing)

age of childbearing=31.5

total fertility rate=9.34-0.25(31.5)

=1.465

=1.47

predicted total fertrility rate at child bearing of 31.5 years is 1.47

yes it would be apporipraite the TFR for a country with mean age at child bearing of 22.7 years is

9.34-0.25(22.7)

=3.665

=3.67

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