Question

The famous scientist Albert Einstein sometimes used "thought experiments" such as imagining himself chasing a beam of light or riding in an elevator in free-fall. These thought experiments, which would not be possible to conduct physically, helped him challenge current scientific thinking and develop his theories of gravity and of special relativity.

In actual physical experiments, scientists must __________ carefully and __________ in data collection and analysis. There is variation in nature, so the larger the __________, the more accurately researchers can determine dissimilarities within each group, and analyze variances between experimental groups and controls. When interpreting data, researchers use __________ to decide if an experimental treatment is significantly different from the control group. When drawing conclusions, the __________ being tested may either be supported, or refuted and __________ to be tested again.
A. avoid errors; statistical analysis; sample size; hypothesis; revised
B. select equipment; avoid errors; sample size; statistical analysis; hypothesis
C. statistical analysis; avoid errors; sample size; revised; select equipment
D. hypothesis; sample size; avoid errors; statistical analysis; revised

Answer 1

In physical experiments, scientists must avoid errors, use meticulous data collection and analysis, have a large sample size, employ statistical analysis, and may support, refute, or revise the hypothesis.

Step-by-step explanation:

In actual physical experiments, scientists must avoid errors carefully and be meticulous in data collection and analysis. There is variation in nature, so the larger the sample size, the more accurately researchers can determine dissimilarities within each group, and analyze variances between experimental groups and controls. When interpreting data, researchers use statistical analysis to decide if an experimental treatment is significantly different from the control group. When drawing conclusions, the hypothesis being tested may either be supported, or refuted and revised to be tested again.