« previous next »

Author Question: For a normal curve, if the mean is 20 minutes and the standard deviation is 5 minutes, find the area ... (Read 100 times)

Marty

  • Hero Member
  • *****
  • Posts: 553
on: Jun 24, 2018
For a normal curve, if the mean is 20 minutes and the standard deviation is 5 minutes, find the area to the right of 12 minutes.

Question 2

The publisher of a daily newspaper claims that 90 of its subscribers are under the age of 30 . Suppose that a sample of 300 subscribers is selected at random. Assuming the claim is correct, approximate the probability of finding at least 240 subscribers in the sample under the age of 30.


31809pancho

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.9452

Answer to Question 2

1


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

Aerial view of old hutong area, Beijing. Aerial view of old hutong area, Beijing.
Clear the popliteal catchment area. Stand next to the recipient’s knee, and face the head of the ... Clear the popliteal catchment area. Stand next to the recipient’s knee, and face the head of the ...
Some Standard Shapes of Greek Vessels Some Standard Shapes of Greek Vessels
Ulnar and radial deviation of the wrist Ulnar and radial deviation of the wrist
Use the product rule to find derivative Use the product rule to find derivative
Construct a Lorenz curve that shows income distribution in this society. Construct a Lorenz curve that shows income distribution in this society.
Video: Krebs cycle : Formation of acetyl coenzyme A and Electron transport chain

For a complete list of videos, visit our video library