Question
In: Statistics and Probability
83. Suppose that the length of long distance phone calls, measured in minutes, is known to...
83. Suppose that the length of long distance phone calls, measured in minutes, is known to have an exponential distribution with the average length of a call equal to eight minutes.
a. Define the random variable. X= ________________.
b. Is X continuous or discrete?
c. μ= ________
d. σ= ________
e. Draw a graph of the probability distribution. Label the axes.
f. Find the probability that a phone call lasts less than nine minutes.
g. Find the probability that a phone call lasts more than nine minutes.
h. Find the probability that a phone call lasts between seven and nine minutes.
i. If 25 phone calls are made one after another, on average, what would you expect the total to be? Why?
Solutions
orchestra answered 1 year agoRelated Solutions
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230230
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the standard deviation was 0.40 minutes. Use Appendix B.3.
What is the probability that calls last between 5.1 and 5.8
minutes? (Round your z value to 2 decimal places
and final answer to 4 decimal places.)
What is the probability that...
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed...
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Corporate Headquarters in Fairfield, Connecticut, revealed the
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distribution. The mean length of time per call was 5.1 minutes and
the standard deviation was 0.40 minutes. Use Appendix B.3.
What is the probability that calls last between 5.1 and 5.8
minutes? (Round your z value to 2 decimal places
and final answer to 4 decimal places.)
What is the probability that...
A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed...
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Corporate Headquarters in Fairfield, Connecticut, revealed the
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Long-Distance Calls A long-distance provider charges the following rates for telephone calls: Rate Category Daytime (6:00...
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$0.05 Create a C++ program that allows the user to select a rate
category and enter the number of minutes of the call, then displays
the charges.
Use the following test data to determine if the application is
calculating properly:
Rate Category and...
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