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

Author Question: Which of the following is true of the trends in infant mortality rate and life expectancy in the ... (Read 82 times)

piesebel

  • Hero Member
  • *****
  • Posts: 565
on: Aug 20, 2018
Which of the following is true of the trends in infant mortality rate and life expectancy in the United States over the past century?
 A) Infant mortality rates have increased and average life expectancy has decreased.
  B) Infant mortality rates have decreased and average life expectancy has increased.
  C) Both have decreased.
  D) Both have increased.

Question 2

In the context of intervention studies, when researchers know who is in the treatment group and who is in the placebo group but participants do not, the study is called a(n) _____.
 A) cohort study
  B) single-blind study
  C) double-blind study
  D) epidemiologic study


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Carliemb17

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Aug 20, 2018
Answer to Question 1

B

Answer to Question 2

B


piesebel

  • Hero Member
  • *****
  • Posts: 565
Reply #2 on: Aug 20, 2018
Thank you!


Carliemb17

  • Sr. Member
  • ****
  • Posts: 325
Reply #3 on: Aug 20, 2018
Always glad to help...


« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Factors influencing pulse rate Factors influencing pulse rate
Lycophyte Life Cycle Lycophyte Life Cycle
Jan de Heem, Still Life with Lobster. Jan de Heem, Still Life with Lobster.
Celine Dion - Loved Me Back To Life (Hudson Leite & Thaellysson Pablo Remix) Celine Dion - Loved Me Back To Life (Hudson Leite & Thaellysson Pablo Remix)
Animated The one-way flow of energy and cycling of materials in the world of life Animated The one-way flow of energy and cycling of materials in the world of life
What rate, compounded once every 3 years, is equivalent to 9% effective rate? What rate, compounded once every 3 years, is equivalent to 9% effective rate?
Video: Osmosis - Isotonic, Hypotonic, and Hypertonic​ Solutions

For a complete list of videos, visit our video library