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

Author Question: In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a ... (Read 51 times)

Mollykgkg

  • Hero Member
  • *****
  • Posts: 529
on: Jun 19, 2018
In a psychology class of 100 students, test scores are normally distributed with a mean of 80 and a standard deviation of 5 . Approximately what percentage of students have scores between 70 and 90?
 
  a. 68
  b. 80
  c. 95
  d. 99

Question 2

Karen's first psychology exam score is 1 standard deviation from the mean in a normal distribution. The test has a mean of 75 and a standard deviation of 5 . Karen's percentile rank would be:
 
  a. 16.
  b. 54.
  c. 70.
  d. cannot say from the information given


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fraziera112

  • Sr. Member
  • ****
  • Posts: 356
Reply #1 on: Jun 19, 2018
Answer to Question 1

c

Answer to Question 2

a


Mollykgkg

  • Member
  • Posts: 529
Reply 2 on: Jun 19, 2018
Great answer, keep it coming :)

momolu

  • Member
  • Posts: 320
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

The Allen Test: Pallor is initiated by compressing the radial and ulnar arteries with the fist clenc The Allen Test: Pallor is initiated by compressing the radial and ulnar arteries with the fist clenc
Earthquakes—Another Test For Plate Tectonics Earthquakes—Another Test For Plate Tectonics
Common Blood Test Groups Common Blood Test Groups
A typical 12 volt test light. A typical 12 volt test light.
Humanist Psychology Humanist Psychology
The Turing Test The Turing Test
Video: Membrane Protein and Facilitated Transport (Passive Vs Active)

For a complete list of videos, visit our video library