This topic contains a solution. Click here to go to the answer

Author Question: The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution with ... (Read 79 times)

TVarnum

  • Hero Member
  • *****
  • Posts: 548
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
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
Great answer, keep it coming :)


mammy1697

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Approximately 25% of all reported medication errors result from some kind of name confusion.

For a complete list of videos, visit our video library