Descriptive investigations involve collecting data about a system, but not making tests or experiments.
Making tests belongs to experimental investigations.
Descriptive investigations aim to draw conclusions from observations of the fenomena, while experimental investigations design tests that let the researcher to compare results on different conditions with a control situation.
There is also the so called comparative investigations which collect data from under different conditions but do not include the control situtation.
Answer:
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Answer:
Reductions in Child Mortality. ...
Vaccine-Preventable Diseases. ...
Access to Safe Water and Sanitation. ...
Malaria Prevention and Control.
Explanation:
The average life expectancy of a child born in the U.S. in 1900 was 50 years. By 2010, this number had increased 60% to 80 years.1 Biomedical, epidemiological, and behavioral research combined with public policy played a major role in this gain. Below are major public health milestones of the last 100 years
Answer:
A. The current price should be lowered to increase the demand for the good
Explanation:
Just took the a p e x quiz
Answer: the 15th ammendment
