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

Author Question: The sample mean for a recent introductory psychology test was 78 and the sample variance was 9 . ... (Read 97 times)

OSWALD

  • Hero Member
  • *****
  • Posts: 580
on: Jun 20, 2018
The sample mean for a recent introductory psychology test was 78 and the sample variance was 9 . Approximately what proportion of the scores was above 81?
 
  a. 0.50 c. 0.16
  b. 0.68 d. 0.34

Question 2

Using the appropriate values from the z-table in the textbook appendix, find the z-score for which the area beyond z in the tail is 0.2546.
 
  a. 0.66 c. 0.66
  b. 0.2454 d. 0.2454


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

millet

  • Sr. Member
  • ****
  • Posts: 354
Reply #1 on: Jun 20, 2018
Answer to Question 1

C

Answer to Question 2

A


OSWALD

  • Member
  • Posts: 580
Reply 2 on: Jun 20, 2018
:D TYSM

Kedrick2014

  • Member
  • Posts: 359
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

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?

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?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Sample Exercise Prescription for Weight Training: Beginner Sample Exercise Prescription for Weight Training: Beginner
Sample of a business card design. Sample of a business card design.
Benedict's test results Benedict's test results
Different ways to test hypotheses Different ways to test hypotheses
Outgroup role in relative rate test Outgroup role in relative rate test
A sample of baking soda is heated and releases carbon dioxide gas into a 1000-mL A sample of baking soda is heated and releases carbon dioxide gas into a 1000-mL
Video: Contraction and Relaxation Animation

For a complete list of videos, visit our video library