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Author Question: Does donating blood lower cholesterol levels? 50 volunteers have a cholesterol test, then donate ... (Read 891 times)

D2AR0N

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on: Jul 24, 2018
Does donating blood lower cholesterol levels? 50 volunteers have a cholesterol test, then donate blood, and then have another cholesterol test. Which aspect of experimental design is present?
 
  A) randomization
  B) none of these
  C) a control group
  D) a placebo
  E) blinding

Question 2

In an experiment the primary purpose of blinding is to reduce
 
  A) confounding.
  B) variation.
  C) randomness.
  D) bias.
  E) undercoverage.
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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pikon

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Reply #1 on: Jul 24, 2018
Answer to Question 1

B

Answer to Question 2

D


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