QuickHelper

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    Phoniex
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Category > Accounting Posted 20 May 2017 My Price 12.00

A study of long-distance phone calls made from

Question description

 

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 4.70 minutes and the standard deviation was 0.50 minutes.
 

a.

What fraction of the calls last between 4.70 and 5.50 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
   

Fraction of calls

b.

What fraction of the calls last more than 5.50 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
   

Fraction of calls

c.

What fraction of the calls last between 5.50 and 6.00 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
   

Fraction of calls

d.

What fraction of the calls last between 4.00 and 6.00 minutes? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
   

Fraction of calls

e.

As part of her report to the president, the director of communications would like to report the length of the longest (in duration) 3 percent of the calls. What is this time? (Round z-score computation to 2 decimal places and your final answer to 2 decimal places.)
   

Duration

Answers

QuickHelper
(10)
Status NEW Posted 20 May 2017 06:05 PM My Price 12.00

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