Birth order and IQ. An international team of economists investigated the possible link between IQ and birth order in CESifo Economic Studies (Vol. 57, 2011). The data source for the research was the Medical Birth Registry of Norway. It is known that the mean IQ (measured in stanines) for all Norway residents is 5.2 points. In the study, a sample of 581 Norway residents who were the 6th-born or later in their families had a mean IQ score of 4.7 points with a standard deviation of 1.8 points. Is this sufficient evidence to conclude that the mean IQ score of all Norway residents who were the 6th-born or later in their families is lower than the country mean of 5.2 points? Use a = .01 as a neasure of reliability for your inference.

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8.44 Birth order and IQ. An international team of economists
investigated the possible link between IQ and birth order in
CESifo Economic Studies (Vol. 57, 2011). The data source
Congnier
for the research was the Medical Birth Registry of Norway.
It is known that the mean IQ (measured in stanines) for
all Norway residents is 5.2 points. In the study, a sample
PH of 581 Norway residents who were the 6th-born or later
in their families had a mean IQ score of 4.7 points with a
standard deviation of 1.8 points. Is this sufficient evidence
to conclude that the mean IQ score of all Norway residents
who were the 6th-born or later in their families is lower
than the country mean of 5.2 points? Use a = .01 as a
measure of reliability for your inference. he cithe
Transcribed Image Text:8.44 Birth order and IQ. An international team of economists investigated the possible link between IQ and birth order in CESifo Economic Studies (Vol. 57, 2011). The data source Congnier for the research was the Medical Birth Registry of Norway. It is known that the mean IQ (measured in stanines) for all Norway residents is 5.2 points. In the study, a sample PH of 581 Norway residents who were the 6th-born or later in their families had a mean IQ score of 4.7 points with a standard deviation of 1.8 points. Is this sufficient evidence to conclude that the mean IQ score of all Norway residents who were the 6th-born or later in their families is lower than the country mean of 5.2 points? Use a = .01 as a measure of reliability for your inference. he cithe
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