10.133 [EX10-133] Using a 95% confidence interval, estimate the mean difference in IQ between the oldest and the youngest members (brothers and sisters) of a family based on the following random sample of IQs. Assume normality.

Oldest 145 133 116 128 85 100 105 150 97 110 120 130 Youngest 131 119 103 93 108 100 111 130 135 113 108 125