Americans receive an average of 20 Christmas cards each year. Suppose the number of Chris cards is normally distributed with a standard deviation of 6. Let X be the number of Christm cards received by a randomly selected American. Round all answers to 4 decimal places whe possible. a. What is the distribution of X? X - N(
Americans receive an average of 20 Christmas cards each year. Suppose the number of Chris cards is normally distributed with a standard deviation of 6. Let X be the number of Christm cards received by a randomly selected American. Round all answers to 4 decimal places whe possible. a. What is the distribution of X? X - N(
MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Please only answer b c d

Transcribed Image Text:e
Americans receive an average of 20 Christmas cards each year. Suppose the number of Christmas
cards is normally distributed with a standard deviation of 6. 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 - NO
b. If an American is randomly chosen, find the probability that this American will receive no more
than 21 Christmas cards this year.
c. If an American is randomly chosen, find the probability that this American will receive
between 19 and 24 Christmas cards this year.
d. 90% of all Americans receive at most how many Christmas cards? (Please enter a whole
number)
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