Which of the following statements are true about bias in epidemiological studies? (Choose 1 best answer) Random, non-systematic deviation of the study results from the truth (measurement error) causes bias    Non-random, systematic deviation of the study results from the truth causes bias   Bias can be detected by examining p-values   Bias can be detected by examining confidence intervals

Which of the following statements about the greenhouse effect is true?

A) Most life on Earth relies upon the hospitable temperatures resulting from the greenhouse effect.
B) The greenhouse effect is a dangerous phenomenon that should be stopped as soon as possible.
C) The greenhouse effect results from the presence of oxygen in the atmosphere.
D) Global warming is likely the result of a lessening of the greenhouse effect.

Which of the following statements about air is TRUE?
A. Air is not a source of resistance.
B. Air has mass, but not inertia.
C. Air is not affected by human movement.
D. None of these statements are true.

Which of the following statements is not true of scientific experiments?

a. They must occur under carefully controlled conditions found in a laboratory.
b. They yield useful results regardless of whether the hypothesis is supported or rejected.
c. They must be well documented.