You have measured the height of 20 chimpanzees from a living population at Gombe, Tanzania. The average height is 0.99 meters with a variance of 0.049. You then make an amazing paleontological find in South Africa: 18 complete skeletons of chimpanzee ancestors dating to 1.6 million years ago. You decide to combine your height measurements from both populations into one histogram and recalculate the mean and variance. In this scenario, what do you think will most likely happen to your variance?
A. It will increase. Alopatric speciation
B. It will decrease.
C. Trick question, you can't caculate variance for extinct populations.
D. It will stay the same.