Question: 4.5.7. Burt (1966) and Weisberg (1985) presented data on IQ scores for identical twins that were raised apart, one by foster parents and one by

4.5.7. Burt (1966) and Weisberg (1985) presented data on IQ scores for identical twins that were raised apart, one by foster parents and one by the genetic parents. Variable y1 is the IQ score for a twin raised by foster parents, while y2 is the corresponding IQ score for the twin raised by the genetic parents. The data are given in Table 4.9.

We are interested in the difference between μ1, the population mean for twins raised by foster parents, and μ2, the population mean for twins raised by genetic parents. Analyze the data. Check your assumptions.

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