Mathematics, 03.10.2021 06:40 Kaytlynshue2443
Americans receive an average of 17 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 ~ N(17,6)
b. If an American is randomly chosen, find the probability that this American will receive no more than 18 Christmas cards this year.
c. If an American is randomly chosen, find the probability that this American will receive between 16 and 19 Christmas cards this year.
d. 84% of all Americans receive at most how many Christmas cards? (Please enter a whole number)
Answers: 2
Mathematics, 21.06.2019 14:40
3× __ -2=15 7 2× __+1=7 5 7× =22 15 5× __+10=2 8 × __+4=20 6 × =10 3 × __+2=8 6 × __+8=8 9 × __+7=20 6
Answers: 3
Mathematics, 21.06.2019 16:00
You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall
Answers: 2
Mathematics, 22.06.2019 00:30
Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great
Answers: 1
Americans receive an average of 17 Christmas cards each year. Suppose the number of Christmas cards...
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