For Numbers 7 and 8: Researchers have long wondered whether intelligence (as measured affected by "nurture" than "nature," that is, whether people's IQ scores are mostly a fu their upbringing and environment or if they are primarily an inherited attribute. A st conducted to determine the answer to the hypothesis. Since genetic differences m intelligence, researchers controlled this factor by conducting a "twin study". Thirty-two identical twins were obtained, of which one of whom is raised by birth parents and the someone else. They were reared apart and at the age of 5, their IQ scores were obtained.

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For Numbers 7 and 8: Researchers have long wondered whether intelligence (as measured by IQ) is
affected by "nurture" than "nature," that is, whether people's IQ scores are mostly a function of
their upbringing and environment or if they are primarily an inherited attribute. A study was
conducted to determine the answer to the hypothesis. Since genetic differences may affect
intelligence, researchers controlled this factor by conducting a "twin study". Thirty-two pairs of
identical twins were obtained, of which one of whom is raised by birth parents and the other by
someone else. They were reared apart and at the age of 5, their IQ scores were obtained.
7. The parameter of interest is
A. IQ scores
B. difference in the IQ scores of twins
C. mean IQ scores of those who were raised by birth parents and mean lIQ scores of those who
were raised by someone else
D. mean difference in the 1Q scores of those who were raised by birth parents and those who
were raised by someone else
8. Upon obtaining the data, a t-test was performed, and the p-value obtained is 0.0331. The
appropriate conclusion at 5% level of significance is
A. There is no sufficient evidence to say that the mean IQ scores of those who were raised by
their birth parents and those who were raised by someone else are different.
B. There is sufficient evidence to say that the mean IQ scores of those who were raised by their
birth parents and those who were raised by someone else are different.
C. There is sufficient evidence to say that the mean IQ scores of those who were raised by their
birth parents is greater than those who were raised by someone else.
D. There is sufficient evidence to say that the mean lQ scores of those who were raised by
someone else is greater than those who were raised by their birth parents.
Transcribed Image Text:For Numbers 7 and 8: Researchers have long wondered whether intelligence (as measured by IQ) is affected by "nurture" than "nature," that is, whether people's IQ scores are mostly a function of their upbringing and environment or if they are primarily an inherited attribute. A study was conducted to determine the answer to the hypothesis. Since genetic differences may affect intelligence, researchers controlled this factor by conducting a "twin study". Thirty-two pairs of identical twins were obtained, of which one of whom is raised by birth parents and the other by someone else. They were reared apart and at the age of 5, their IQ scores were obtained. 7. The parameter of interest is A. IQ scores B. difference in the IQ scores of twins C. mean IQ scores of those who were raised by birth parents and mean lIQ scores of those who were raised by someone else D. mean difference in the 1Q scores of those who were raised by birth parents and those who were raised by someone else 8. Upon obtaining the data, a t-test was performed, and the p-value obtained is 0.0331. The appropriate conclusion at 5% level of significance is A. There is no sufficient evidence to say that the mean IQ scores of those who were raised by their birth parents and those who were raised by someone else are different. B. There is sufficient evidence to say that the mean IQ scores of those who were raised by their birth parents and those who were raised by someone else are different. C. There is sufficient evidence to say that the mean IQ scores of those who were raised by their birth parents is greater than those who were raised by someone else. D. There is sufficient evidence to say that the mean lQ scores of those who were raised by someone else is greater than those who were raised by their birth parents.
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