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

Author Question: The time it takes to completely tune an engine of an automobile follows an exponential distribution ... (Read 132 times)

drink

  • Hero Member
  • *****
  • Posts: 554
on: Jun 24, 2018
The time it takes to completely tune an engine of an automobile follows an exponential distribution with a mean of 40 minutes.
 a. Define the random variable in words.
  b. What is the probability of tuning an engine in 30 minutes or less?
  c. What is the probability of tuning an engine between 30 and 35 minutes?

Question 2

A real estate agent wants to estimate the mean selling price of two-bedroom homes in a particular area. She wants to estimate the mean selling price to within 10,000 with an 89.9 level of confidence. The standard deviation of selling prices is unknown but the agent estimates that the highest selling price is 1,000,000 and the lowest is 50,000 . How many homes should be sampled?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

IRincones

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. time it takes to completely tune an engine
b. .5276
c. .0555

Answer to Question 2

1518


drink

  • Member
  • Posts: 554
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

bblaney

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue
Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ... Students rated their grandparents on a scale from 1 to 4 based on emotional closeness, time spent ...
With fewer men than women in college, is it time to consider affirmative action for men? With fewer men than women in college, is it time to consider affirmative action for men?
Notice how clean the engine appears. This is a testament of proper maintenance and regular ... Notice how clean the engine appears. This is a testament of proper maintenance and regular ...
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
Trimodal distribution of trauma deaths Trimodal distribution of trauma deaths
Video: Bond types - Atomic structure and basis of bonds

For a complete list of videos, visit our video library