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 175 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

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Men and women work the same number of hours a week, but men spend more time on paid work, and women ... Men and women work the same number of hours a week, but men spend more time on paid work, and women ...
In the photo on the left, Henry Ford proudly displays his 1905 car, the latest in automobile ... In the photo on the left, Henry Ford proudly displays his 1905 car, the latest in automobile ...
If a cylinder(s) is lower than most of the others, use an oil can and use two squirts of engine oil ... If a cylinder(s) is lower than most of the others, use an oil can and use two squirts of engine oil ...
When the engine achieves closed-loop, the air is directed to the catalytic converter. When the engine achieves closed-loop, the air is directed to the catalytic converter.
Distribution Patterns and Population Size Estimates (Bio 30) Distribution Patterns and Population Size Estimates (Bio 30)
Distribution of fluid compartments in the body Distribution of fluid compartments in the body
Video: Steps of glucose catabolism

For a complete list of videos, visit our video library