Brain size and intelligence. For centuries people have associated intelligence with brain size. A recent study used magnetic resonance imaging to measure the brain size of several individuals.

The IQ and brain size (in units of 10,000 pixels) of six individuals are as follows:

Brain size: 100 90 95 92 88 106 IQ: 140 90 100 135 80 103 Make a scatterplot of these data if you have not already done so. What is the form, direction, and strength of the association? Are there any outliers?