# Question

A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of time per call was 4.2 minutes and the standard deviation was 0.60 minute.

a. What fraction of the calls lasts between 4.2 and 5 minutes?

b. What fraction of the calls lasts more than 5 minutes?

c. What fraction of the calls lasts between 5 and 6 minutes?

d. What fraction of the calls lasts between 4 and 6 minutes?

e. As part of her report to the president, the director of communications would like to report the length of the longest (in duration) 4% of the calls. What is this time?

a. What fraction of the calls lasts between 4.2 and 5 minutes?

b. What fraction of the calls lasts more than 5 minutes?

c. What fraction of the calls lasts between 5 and 6 minutes?

d. What fraction of the calls lasts between 4 and 6 minutes?

e. As part of her report to the president, the director of communications would like to report the length of the longest (in duration) 4% of the calls. What is this time?

## Answer to relevant Questions

Shaver Manufacturing Inc. offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution, with a mean of ...Best Electronics Inc. offers a “no hassle” returns policy. The number of items returned per day follows the normal distribution. The mean number of customer returns is 10.3 per day and the standard deviation is 2.25 per ...The funds dispensed at the ATM machine located near the checkout line at the Kroger’s in Union, Kentucky, follows a normal probability distribution with a mean of $4,200 per day and a standard deviation of $720 per day. ...“Boot time” (the time between the appearance of the Bios screen to the first file that is loaded in Windows) on Eric Mouser’s personal computer follows an exponential distribution with a mean of 27 seconds. What is the ...A study of the attendance at the University of Alabama’s basketball games revealed that the distribution of attendance is normally distributed with a mean of 10,000 and a standard deviation of 2,000.a. What is the ...Post your question

0