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

Author Question: A researcher used a pretest-posttest, control group quasi-experimental design. The experimental ... (Read 164 times)

formula1

  • Hero Member
  • *****
  • Posts: 666
on: Jun 20, 2018
A researcher used a pretest-posttest, control group quasi-experimental design. The experimental group had a mean achievement test score of 40 on the pretest and 70 on the posttest. The control group had a mean achievement score of 50 on the pretest and 60 on the posttest. What statistical technique should the researcher use to analyze these data?
 
  a. t-test c. ANCOVA (analysis of covariance)
  b. ANOVA (analysis of variance) d. chi-square

Question 2

A third grade teacher feels that vocabulary instruction will help her children improve their reading scores. Half of her class receives vocabulary instruction, while the other half has a library period. She will compare reading scores after four months. The external validity question in this study would be:
 
  a. is vocabulary instruction worth the time it involves?
  b. was vocabulary instruction really responsible for the observed difference in reading scores?
  c. would vocabulary instruction improve reading scores for all third graders?
  d. should the teacher have exposed all the students to vocabulary instruction?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

scrocafella

  • Sr. Member
  • ****
  • Posts: 346
Reply #1 on: Jun 20, 2018
Answer to Question 1

C

Answer to Question 2

C


formula1

  • Hero Member
  • *****
  • Posts: 666
Reply #2 on: Jun 20, 2018
Thank you!


scrocafella

  • Sr. Member
  • ****
  • Posts: 346
Reply #3 on: Jun 20, 2018
Happy to help


« previous next »
 

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Experimental Evidence for Infrared Radiation Experimental Evidence for Infrared Radiation
Control of Secretion of Stress Hormones Control of Secretion of Stress Hormones
Masamichi Udagawa and Sigi Moeslinger, Antenna Design, Knoll Toboggan Chair. Masamichi Udagawa and Sigi Moeslinger, Antenna Design, Knoll Toboggan Chair.
In a multiair engine design, the exhaust valves are opened by the exhaust camshaft lobes. Intake ... In a multiair engine design, the exhaust valves are opened by the exhaust camshaft lobes. Intake ...
Design Data for Various Packings Design Data for Various Packings
A Healthy Daily Food Plan A variety of foods from each group creates a well-balanced diet A Healthy Daily Food Plan A variety of foods from each group creates a well-balanced diet
Video: Muscle Twitch and Muscle Tension - Motor unit size and force

For a complete list of videos, visit our video library