Which Statement About the Scientific Method Is True

question 39

Multiple Choice

Which statement about the scientific method is true?

• A) After forming a hypothesis,scientists apply logic to make predictions from the hypothesis.
• B) The most informative experiments are those that have the ability to show that a hypothesis is correct.
• C) In a comparative experiment,a scientist compares groups that differ in terms of a variable that has been manipulated in one of the groups and left unaltered in the other group.
• D) Controlled experiments are valuable when we do not know or cannot control the critical variables.
• E) A statistical test of a hypothesis starts with the premise that a significant difference exists between the groups in the study.

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Definitions:

Significance Level

A threshold within which the results of a statistical test are deemed statistically significant, often denoted as alpha (α), with common values like 0.05 or 0.01.

Critical Value

A location within the test distribution measured against the test statistic to determine the rejection of the null hypothesis.

Regression Slope Coefficient

A measure in regression analysis that quantifies the change in the dependent variable for a one unit change in an independent variable.

Confidence Interval

A range of values, derived from sample data, that is likely to contain the value of an unknown population parameter with a certain level of confidence.