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 197 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
Excellent

AngeliqueG

  • Member
  • Posts: 343
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Nerves can transmit many signals at the same time Nerves can transmit many signals at the same time
Example of simplified note for one-time client. Example of simplified note for one-time client.
Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ... Use two hands to squeeze both sides of the arm at the same time. Apply from shoulder to wrist. ...
You're just on Time You're just on Time
Video: Phases of the ovarian cycle

For a complete list of videos, visit our video library