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For practice only You may need to use the appropriate appendix table to answer this question The average price for a gallon of gasoline in the country

For practice only: You may need to use the appropriate appendix table to answer this question.

The average price for a gallon of gasoline in the country A is $2.77 and in country B it is $2.45. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of $0.25 in the country A and a standard deviation of $0.20 in country B.

(a)

What is the probability that a randomly selected gas station in country A charges less than $2.50 per gallon? (Round your answer to four decimal places.)

(b)

What percentage of the gas stations in country B charge less than $2.50 per gallon? (Round your answer to two decimal places.)

 %

(c)

What is the probability that a randomly selected gas station in country B charged more than the mean price in the country A? (Round your answer to four decimal places.)

Apr 10 2020 View more View Less

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