Wood Duck Weights

Suppose that it is known that the weights of adult wood ducks is normally distributed with a mean of 450 g and a standard deviation of 50 g. Use this information to answer the following questions.

  1. What percentage of wood ducks weigh more than 575 g?
  2. What percentage of wood ducks weigh less than 420 g?
  3. What percentage of wood ducks weigh between 360 and 480 g?

 

  1. What is the wood duck weight for the lightest (smallest) 10% of wood ducks?
  2. What is the wood duck weight for the heaviest 25% of wood ducks?