This topic contains a solution. Click here to go to the answer

Author Question: An investigator compared the effectiveness of two methods of instruction (A and B) on the math ... (Read 22 times)

amal

  • Hero Member
  • *****
  • Posts: 572
An investigator compared the effectiveness of two methods of instruction (A and B) on the math achievement of boys and girls. The mean test scores are presented below. What interpretation of these results would be justified?
   Method
   A B
   Gender Boys 40 30
   Girls 20 30
 
  a. There was a main effect for method of instruction.
  b. There was a main effect for gender.
  c. There was an interaction between gender and method of instruction.
  d. b and c
  e. All of the above are true.

Question 2

The standard error of estimate is equal to zero only if the
 
  a. correlation between X and Y = 0.
  b. correlation between X and Y = 1.0.
  c. mean on X is equal to the mean on Y.
  d. standard deviation of X is equal to the standard deviation of Y.
  e. distributions of X and Y are normal.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ju

  • Sr. Member
  • ****
  • Posts: 325
Answer to Question 1

ANS: D

Answer to Question 2

B




amal

  • Member
  • Posts: 572
Reply 2 on: Jun 20, 2018
:D TYSM


steff9894

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Gracias!

 

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

For a complete list of videos, visit our video library