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 normal. Can you conclude that the mean IQ of firstborn sons differs from the mean IQ of secondborn sons? Let 1

denote the mean IQ of firstborn sons and

2

denote the mean IQ of secondborn sons. Use the =0.10 level and the P-valuemethod with the TI-84 Plus calculator.

Firstborn
99	91	99	82	91
117	129	88	104	84

Secondborn
109	109	111	99	109
113	119	114	99	127

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Part 1 of 4

State the appropriate null and alternate hypotheses.

H0	:
H1	:

This is a (Choose one) test. right , left, or two tailed test?

Part 2 Find the P value.