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

Author Question: Describe the method of finding the area under the standard normal curve between z = 0 and z =- ... (Read 63 times)

audragclark

  • Hero Member
  • *****
  • Posts: 579
Describe the method of finding the area under the standard normal curve between z = 0 and z =- 1.33.

Question 2

Delivery time by courier services is important to stock brokers. One such firm wishes to estimate the average time taken by couriers delivering negotiable securities in New York City. Specifically, the firm randomly samples 36 courier pickup and delivery times. The collected data, in minutes, represent the time between pickup and delivery. Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975 . Find the sample mean and compute. A 90-percent confidence interval for the true mean delivery time,  is:
 a. 9.852 to 10.05.
  b. 119.60 to 119.80.
  c. 119.62 to 119.78.
  d. 119.26 to 119.87.
  e. 9.893 to 10.057.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

djofnc

  • Sr. Member
  • ****
  • Posts: 318
Answer to Question 1

Recall the property of symmetry. The area to the left of 0 to - 1.33 is the same as for the area to the right of 0 to 1.33 . Go down the left most column of the standard normal table to the row with 1.3 and right across the rows until in the column headed at the top with .03. The value is 0.4082, which is the area between z = 0 and z = -1.33.

Answer to Question 2

E




audragclark

  • Member
  • Posts: 579
Reply 2 on: Jun 24, 2018
Wow, this really help


deja

  • Member
  • Posts: 332
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

For a complete list of videos, visit our video library