1. What is the link between the normal distribution and Math Talk 5 (Variation 2 (and egg roulette)), where we relied on statements such as "about two-thirds of observations are within one standard deviation of the mean"? Point out that relationship between quantiles and standard deviations assumes that the distribution of the data does not stray too far fromthe data does notstray too far from the normal.

1. Do natural phenomena such as hemoglobin levels or the weight of ants really follow a normal distribution? Point outthat no data set can ever perfectly match a theoretical distribution.

1. If you add up a large number of random events, you get a normal distribution. How large a number makes a normal distribution?

1. Are the results of studies due to adding up a large number of random events?