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 94 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 :)

pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

A tapeworm, Taenia pisiformis, a member of the class Cestoda. A tapeworm, Taenia pisiformis, a member of the class Cestoda.
Assisting with a Pelvic Examination and Pap Test Assisting with a Pelvic Examination and Pap Test
Social Class and Religious Affiliation Social Class and Religious Affiliation
Calcium Channel Blockers (Class IV) and Miscellaneous Drugs for Dysrhythmias Calcium Channel Blockers (Class IV) and Miscellaneous Drugs for Dysrhythmias
Normal and abnormal corneal light reflection test Normal and abnormal corneal light reflection test
Schamroth test A. Healthy nail B. Clubbing Schamroth test A. Healthy nail B. Clubbing
Video: Bone tissue types - compact and spongy

For a complete list of videos, visit our video library