Answered: Are you smarter than your older…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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. Assume that the samples come from normal populations.

Firstborn
107.1	91	113.2	108.5	147.1
89.9	120.8	110.2	101.5	107.1

Secondborn
104	104	98.3	123.2	113.2
110.2	98.4	99	131.1	124.3

Find the critical value. Round the answer to at least two decimal places.

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