Author Question: Dr. Nguyen is studying how the quality of breakfast influences academic performance for elementary ... (Read 79 times)

Starlight

  • Hero Member
  • *****
  • Posts: 567
Dr. Nguyen is studying how the quality of breakfast influences academic performance for elementary school children. A sample of 100 children is selected. Fifty children are provided with a nutritious breakfast when they arrive at school each morning. The other 50 children are given a doughnut each morning. After three months, Dr. Nguyen records the academic achievement level for each child and compares the two groups of scores. In this example, how many levels are there for the independent variable?
 
  a. 1
 b. 2
 c. 50
 d. 100

Question 2

A clinical trial is most likely to use a ____ sample.
 
  a. nonprobability
  b. probability
 c. random
 d. simple



Yixagurpuldink

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

b

Answer to Question 2

a



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

For a complete list of videos, visit our video library