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 71 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
YES! Correct, THANKS for helping me on my review

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Meal Time Meal Time
The distribution of the tarsier. The distribution of the tarsier.
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
Expected Distribution of IQ Scores Expected Distribution of IQ Scores
Solution to exponential problem Solution to exponential problem
Time value money Time value money
Video: Sickle Cell Anemia

For a complete list of videos, visit our video library