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

Author Question: Scores on a particular test are normally distributed with a mean of 126 points. Find the standard ... (Read 163 times)

rlane42

  • Hero Member
  • *****
  • Posts: 594
on: Jul 24, 2018
Scores on a particular test are normally distributed with a mean of 126 points. Find the standard deviation if for these scores, P90 = 160.0.

Question 2

The random variable x has a normal distribution with mean of 75.0 and standard deviation of 2.5 . Waiting times to see a doctor at a large clinic are normally distributed with a mean of 68.2 minutes and a standard deviation of 14.8 minutes. Find the probability that the waiting time to see a doctor is less than 45.0 minutes.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jharrington11

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Jul 24, 2018
Answer to Question 1

26.6

Answer to Question 2

0.0582


rlane42

  • Hero Member
  • *****
  • Posts: 594
Reply #2 on: Jul 24, 2018
Thanks


jharrington11

  • Sr. Member
  • ****
  • Posts: 365
Reply #3 on: Jul 24, 2018
Welcome :)


« previous next »
 

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

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

(A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive (A) Scratch test; patient is exposed to allergens through a light scratch on the skin; (B) Positive
Chéri Samba, Problème d'eau. Où trouver l'eau? (The Water Problem. Where to Find ... Chéri Samba, Problème d'eau. Où trouver l'eau? (The Water Problem. Where to Find ...
Because of immature visual-motor coordination, young children find it hard to throw and catch small ... Because of immature visual-motor coordination, young children find it hard to throw and catch small ...
Cover test Cover test
Use the power rule to find derivative Use the power rule to find derivative
Calculus help: Find a cubic function f (x) = ax3 +bx2 +cx+d that has a local maximum value of 3 ... Calculus help: Find a cubic function f (x) = ax3 +bx2 +cx+d that has a local maximum value of 3 ...
Video: Language Areas Animation

For a complete list of videos, visit our video library