The number of times per minute that a hummingbird’s wings flap is normally distributed
with a mean of 145 and a standard deviation of 2.
Part A: What is the probability that a randomly selected hummingbird flaps its wings more
than 151 times a minute?
Part B: What percentage of hummingbirds flap their wings between 141 and 149 times per
minute?
Part C: A hummingbird that flaps its wings 147 times a minute is in the
percentile.