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

Author Question: The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution with ... (Read 73 times)

TVarnum

  • Hero Member
  • *****
  • Posts: 548
on: Jun 24, 2018
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution with mean 2:00 P.M. and standard deviation of 15 minutes.
 a. What is the probability the mail will arrive after 2:30 P.M.?
  b. What is the probability the mail will arrive before 1:36 P.M.?
  c. What is the probability the mail will arrive between 1:48 P.M. and 2:09 P.M.?

Question 2

In a random sample of 200 registered voters, 120 indicated they are Democrats. Develop a 95 confidence interval for the proportion of registered voters in the population who are Democrats.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

pocatato

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .0228
b. .0548
c. .5138

Answer to Question 2

.5321 to .6679


TVarnum

  • Member
  • Posts: 548
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

A normal pregnancy. A normal pregnancy.
Frequency distribution curve: interpatient variability in drug response. Frequency distribution curve: interpatient variability in drug response.
Pressure drop after 10 minutes on a normal port fuel-injection system. Pressure drop after 10 minutes on a normal port fuel-injection system.
Normal action of antidiuretic hormone. Normal action of antidiuretic hormone.
The frequency of aneuploidy changes dramatically over developmental time. Between 6 to 8 weeks and 2 The frequency of aneuploidy changes dramatically over developmental time. Between 6 to 8 weeks and 2
The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p
Video: Lower Limb Arteries Animation

For a complete list of videos, visit our video library