The length of human pregnancies from conception to birth varies according to a normal distribution with mean of 266 days and a standard deviation of 16 days. Find the mean and the standard deviation of the number of home runs hit by Babe Ruth. Then, find the same for Mark McGwire. Using these numbers compare the distribution of the number of home runs hit by Babe Ruth with that of Mark McGwire.
Manatees are large, gentle sea creatures that live along the Florida coast.
Many manatees are killed by power boats. Describe the explanatory variable and the response variable. Find and specify the equation of the line of regression for predicting the number of manatees killed from powerboat registrations. Predict the number of manatees killed in a year with 725000 powerboat registrations. If the number of manatees killed in a year was 45, predict the number of pwerboat registrations for that year.