This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The time between arrivals of customers at the drive-up window of a bank follows an exponential ... (Read 128 times)

mwit1967

  • Hero Member
  • *****
  • Posts: 501
on: Jun 24, 2018
The time between arrivals of customers at the drive-up window of a bank follows an exponential probability distribution with a mean of 10 minutes.
 a. What is the probability that the arrival time between customers will be 7 minutes or less?
  b. What is the probability that the arrival time between customers will be between 3 and 7 minutes?

Question 2

A researcher is interested in determining the average number of years employees of a company stay with the company. If past information shows a standard deviation of 7 months, what size sample should be selected so that at 95 confidence the margin of error will be 2 months or less?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

janieazgirl

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .5034
b. .2442

Answer to Question 2

48


mwit1967

  • Member
  • Posts: 501
Reply 2 on: Jun 24, 2018
Excellent

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Principles of time management Principles of time management
Many gasoline service stations have signs posted warning customers to place plastic fuel containers ... Many gasoline service stations have signs posted warning customers to place plastic fuel containers ...
Always take the time to install spark plug wires back into the original holding brackets (wiring ... Always take the time to install spark plug wires back into the original holding brackets (wiring ...
Velocity-time Graph Velocity-time Graph
Disitive Time For Fruits Disitive Time For Fruits
How gene drive alleles can spread through populations How gene drive alleles can spread through populations
Video: Neurotransmission at chemical synapses & Excitory and inhibitory potentials

For a complete list of videos, visit our video library