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Statistics

According to Cellular Telecommunications industry Association, the average local monthly cell phone bill is \$42.78. Suppose local monthly cell phone bills are normally distributed, with a standard deviation of \$11.35.

a) What is the probability that a randomly selected cell phone bill is more than \$67.75?
b) What is the probability that a randomly selected cell phone bill is no more than \$25?

Statistics and Probability, Statistics

• Category:- Statistics and Probability
• Reference No.:- M998444

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