Question
In: Statistics and Probability
3. Are you smarter than your older brother? A study of birth order and intelligence, IQ...
3. Are you smarter than your older brother? A study of birth order and intelligence, IQ tests were given to 18 and 19 year old men to estimate the size of the difference, if any, between the mean IQs of first born and second born sons. The following date for 10 first born sons and 10 second born sons are consistent with means and standard deviations reported in this article. It is reasonable to assume that the samples come from populations that are approximately normal. Second Born 103 103 91 113 102 103 92 90 114 113 First Born 104 82 102 96 129 89 114 107 89 103
a. Construct a 95 % confidence interval for the difference in Mean IQ between firstborn and second born sons?
b. Can you conclude that there is difference in mean IQ between firstborn and second born sons? Use the α=0.01 level of significance.
Solutions
orchestra answered 2 years agoRelated Solutions
Are you smarter than your older brother? In a study of birth order and intelligence, IQ...
Are you smarter than your older brother? In a study of birth
order and intelligence, IQ tests were given to 18- and 19-year-old
men to estimate the size of the difference, if any, between the
mean IQs of firstborn sons and secondborn sons. The following data
for 10 firstborn sons and 10 secondborn sons are consistent with
the means and standard deviations reported in the article. It is
reasonable to assume that the samples come from populations that
are approximately...
Are you smarter than your older brother? In a study of birth order and intelligence, IQ...
Are you smarter than your older brother? In a
study of birth order and intelligence, IQ tests were given to
18
- and
19
-year-old men to estimate the size of the difference,
if any, between the mean IQs of firstborn sons and secondborn sons.
The following data for
10
firstborn sons and
10
secondborn sons are consistent with the means and standard
deviations reported in the article. It is reasonable to assume that
the samples come from populations that are...
Belmont and Marolla conducted a study on the relationship between birth order, family size, and intelligence....
Belmont and Marolla conducted a study on the relationship
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Belmont and Marolla conducted a study on the relationship between birth order, family size, and intelligence....
Belmont and Marolla conducted a study on the relationship
between birth order, family size, and intelligence. The subjects
consisted of all Dutch men who reached the age of 19 between 1963
and 1966. These men were required by law to take the Dutch army
induction tests, including Raven’s intelligence test. The results
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