Find the probability that call lasted less than 180 seconds

Reference no: EM13472600

A statistical analysis of 1,000 long-distance telephone 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 = 10 seconds.

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

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

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

d) 1 % of all calls will last less than how many seconds?

Reference no: EM13472600

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