Question 4

Americans receive an average of 15 Christmas cards each year. Suppose the number of Christmas cards is normally distributed with a standard deviation of 7. Let X be the number of Christmas cards received by a randomly selected American. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 15 b. If an American is randomly chosen, find the probability that this American will receive no more than 17 Christmas cards this year. c. If an American is randomly chosen, find-the probability that this American will receive between 17 and 22 Christmas cards this year. d. 89%% of all Americans receive at most how many Christmas cards? (Please enter a whole number) Hint: Helpful videos: . Find a Probability _ [+] . Finding a Value Given a Probability ? [+] Hint