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 54 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
:D TYSM

Laurenleakan

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Varus Stress Test Varus Stress Test
Triceps Reflex Test Triceps Reflex Test
Work Settings for People Earning Master’s and Bachelor’s Degrees in Psychology Work Settings for People Earning Master’s and Bachelor’s Degrees in Psychology
Are the resutls from the glucose strip test consistent with the results obtained from the ... Are the resutls from the glucose strip test consistent with the results obtained from the ...
An example of an EHR screen used to order a laboratory test. An example of an EHR screen used to order a laboratory test.
Monozygotic twins’ scores for five personality factors show higher correlations than scores for ... Monozygotic twins’ scores for five personality factors show higher correlations than scores for ...
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library