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 53 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
Thanks for the timely response, appreciate it

pangili4

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry. Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry.
A miner greets the president. Franklin’s “first-class temperament” compensated for his ... A miner greets the president. Franklin’s “first-class temperament” compensated for his ...
Young adults with low levels of parental support report significantly better scores on measures of ... Young adults with low levels of parental support report significantly better scores on measures of ...
Who Goes to College? Comparing Social Class and Ability in Determining College Attendance Who Goes to College? Comparing Social Class and Ability in Determining College Attendance
Two items from the incomplete-pictures test. H.M.’s memory for the 20 items on the test was ... Two items from the incomplete-pictures test. H.M.’s memory for the 20 items on the test was ...
Performing the Trendelenburg test: Watching for filling Performing the Trendelenburg test: Watching for filling
Video: Introduction to Breast Cancer

For a complete list of videos, visit our video library