Statistical analysis of long-distance calls

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Reference no: EM1393171

A statistical analysis of 1,000 long-distance calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distributed with μ = 240 seconds and σ = 40 seconds.

a) What is the probably that a call lasted less than 180 seconds?

b) What is the probability that a particular call lasted between 180 and 300 seconds?

c) What is the probability that a call lasted between 110 and 180 seconds?

d) What is the length of a call if only 1% of all calls are shorter?

Reference no: EM1393171

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