An educator wants to determine whether early exposure to school will affect IQ. He enlists the aid of the parents of 12 pairs of preschool-age identical twins who agree to let their twins participate in this experiment. One member of each twin pair is enrolled in preschool for 2 years while the other member of each pair remains at home. At the end of the 2 years, the IQs of all the children are measured. The results follow. IQ Pair Twin at preschool Twin at home 1 110 114 2 121 118 3 107 103 4 117 112 5 115 117 6 112 106 7 130 125 8 116 113 9 111 109 10 120 122 11 117 116 12 106 104 Does early exposure to school affect IQ? Use _ _ 0.052