A study of long-distance phone calls made from the corporateoffices of the Pepsi Bottling Group Inc. showed the calls followthe normal distribution. The mean length of time per call was 4.2minutes and the standard deviation was 0.60 minutes
a) What is the probability the calls lasted between 3.5 and 4.1minutes?
b) What is the probability the calls lasted less than 3.4minutes?
c) As part of her report to the president, the director ofcommunications would like to report the minimum length of thelongest (in duration) 4% of the calls. What is this time?
d) As part of her report to the president, the director ofcommunications would like to report the maximum length of theshortest (in duration) 8% of the calls. What is this time?
