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Question: What is the probability According to a report by Scarborough Research, the average monthly househ…

by | Nov 30, 2023 | Posted Questions



What is the probability

According to a report by Scarborough Research, the average
monthly household cellular phone bill is $73. Suppose local monthly
household cell phone bills are normally distributed with a standard
deviation of $11.35.

a. What is the probability that a randomly selected monthly cell
phone bill is less than $100?

b. What is the probability that a randomly selected monthly cell
phone bill is between $70 and $90?

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