Author Question: To see if breast-feeding influences the incidence of the disease rickets, researchers study rates of ... (Read 36 times)

bobbie

  • Hero Member
  • *****
  • Posts: 592
To see if breast-feeding influences the incidence of the disease rickets, researchers study rates of breast-feeding of infants with and without rickets. This is an example of
 
  A. experimental research.
  B. observational research.
  C. epidemiological research.
  D. double-blind placebo-controlled research.

Question 2

It is very important in a double-blind, placebo-controlled study that all of the factors that could influence the study results are
 
  A. completely different for the groups of subjects.
  B. equal and opposite for the groups of subjects.
  C. kept to a minimum.
  D. kept the same for the groups of subjects.



lcapri7

  • Sr. Member
  • ****
  • Posts: 350
Answer to Question 1

ANS: B

Answer to Question 2

ANS: D



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

For a complete list of videos, visit our video library