Author Question: A college dorm obtains a sample of its residents by randomly selecting 5 of the 20 floors and ... (Read 40 times)

WhattoUnderstand

  • Hero Member
  • *****
  • Posts: 517
A college dorm obtains a sample of its residents by randomly selecting 5 of the 20 floors and interviewing all students living on those 5 floors.
 
  A) Yes B) No

Question 2

A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.8 hours.
 
  If 40 mechanics are randomly selected, find the probability that their mean rebuild time exceeds 8.1 hours.
  A) 0.8457 B) 0.7285 C) 0.8531 D) 0.9146



miss.ashley

  • Sr. Member
  • ****
  • Posts: 371
Answer to Question 1

A

Answer to Question 2

C



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

For a complete list of videos, visit our video library