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

Author Question: The Harbour Island Ferry leaves on the hour and at 15-minute intervals. The time, x, it takes John ... (Read 177 times)

jc611

  • Hero Member
  • *****
  • Posts: 552
on: Jun 24, 2018
The Harbour Island Ferry leaves on the hour and at 15-minute intervals. The time, x, it takes John to drive from his house to the ferry has a uniform distribution with x between 10 and 20 minutes. One morning John leaves his house at precisely 8:00 A.M.
 a. What is the probability John will wait less than 5 minutes for the ferry?
  b. What is the probability John will wait less than 10 minutes for the ferry?
  c. What is the probability John will wait less than 15 minutes for the ferry?
  d. What is the probability John will not have to wait for the ferry?
  e. Suppose John leaves at 8:05 A.M. What is the probability John will wait (1) less than 5 minutes for the ferry; (2) less than 10 minutes for the ferry?
  f. Suppose John leaves at 8:10 A.M. What is the probability John will wait (1) less than 5 minutes for the ferry; (2) less than 10 minutes for the ferry?
  g. What appears to be the best time for John to leave home if he wishes to maximize the probability of waiting less than 10 minutes for the ferry?

Question 2

It is known that the variance of a population equals 484 . A random sample of 81 observations is going to be selected from the population.
 a. With an .80 probability, what statement can be made about the size of the margin of error?
  b. With an .80 probability, what sample size would have to be selected to provide a margin of error of 3 or less?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

hugthug12

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .5
b. .5
c. 1
d. 0
e. (1) 0, (2) .5
f. (1) .5, (2) 1
g. 8:10

Answer to Question 2

a. There is a .80 probability that the sample mean will provide a margin of error of 3.129 or less.
b. 89


jc611

  • Member
  • Posts: 552
Reply 2 on: Jun 24, 2018
Wow, this really help

ktidd

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Garbage Island Garbage Island
Island of Galesnjak Island of Galesnjak
Some scholars regard Walt Whitman as a poet of nature, and others, a poet of the body—a reference to Some scholars regard Walt Whitman as a poet of nature, and others, a poet of the body—a reference to
Time course of HIV infection. Time course of HIV infection.
Insecticide application over time Insecticide application over time
Leaves of sugar maples (Acer saccharum) Leaves of sugar maples (Acer saccharum)
Video: Summary of female reproductive cycle days 1-28

For a complete list of videos, visit our video library