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A graduate student in developmental psychology believes there may be a reiationship between birth weight and subsequent IQ. She randomly samples seven psychology majors at

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A graduate student in developmental psychology believes there may be a reiationship between birth weight and subsequent IQ. She randomly samples seven psychology majors at her university and gives them an [Q test. Next she obtains the weight at birth of the seven majors from the appropriate hospitals (after obtaining permission from the students. of course). The data are shown in the following table. Birth Weight Student (lbs) IQ ' """" i VVVVVVVVVVV 5.6 """""" 7136'" 2 6 1. 120 3 7 9 130 4 5 5 112 5 8 2 129 5 6 9 116 7 8 9 128 (a) Assuming there is a 1inearreiationship, use these data and determine the least-squares regression line for predicting IQ given birth weight. (b) Using this regression line, what IQ would you predict for a birth weight of 7.8? |:|

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