An irruption is an irregular migration of birds in a region where they are not not usually found. In North America, there is usually an eruption in winter which causes snowy owls to fly south in greater numbers than usual approximately every four years. Many Ontarians have been lucky enough to spot a birdy owl snow in 2014. Suppose that the body size of a snowy owl is normally distributed with an average of 61.5 cm and a standard deviation of 4.75 cm. (a) What proportion of snowy owls are larger than 65 cm? (b) What proportion of snowy owls are less than 55 cm tall? (c) Suppose we randomly select 10 snowy owls from this population. What is the expected number of snowy owls in the sample with a larger size? than 55 cm? (d) Suppose that the standard deviation of the body size of a snowy owl has changed. However, it can be assumed that the size is normally distributed with an average of 61.5 We know that 25% of snowy owls are larger than 65 cm. What is The typical deviation of the body size of a snowy owl?