1. The age distribution of fishers in BC are normally distributed with a mean of 40 years and a standard deviation of 12.

a) How old would a fisher be if her age was 2 standard deviations below the mean?

b) Using the 68-95-97.5 rule, what percent of fishers are less than 52 years old?

2. A guinea pig has an IQ of 8 in a population of guinea pigs that has a mean IQ of 12 and a standard deviation of 2.5. The IQ of guinea pigs is normally distributed. Calculate the z-score for this guinea pig.

3. Jana the Orca weighed 4.5 tonnes. The mean weight of Orcas is 4.2 tonnes with a standard deviation of 1.1 tonnes. Philip the Blue Whale weighed 147 tonnes in a population with a mean of 140 tonnes and a standard deviation of 35. With regard to weight, which of the whales has a higher position in their species?