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Ghella [55]
2 years ago
7

A researcher studying handwashing uses guidelines set by the American Society of Microbiology to determine if handwashing has ta

ken place: use warm or hot running water and soap while washing for 10 to 15 seconds all surfaces, including wrists, palms, backs of hands, and under fingernails. This guideline is considered a. the Hawthorne effect. b. an operational definition. c. a correlation. d. a test.
Biology
1 answer:
Mariana [72]2 years ago
5 0

Answer:

The correct answer is b. an operational definition.  

Explanation:

An operational definition constitutes the set of procedures that describe the activities that an observer must carry out to receive sensory impressions, which indicate the existence of a theoretical concept to a greater or lesser degree. In this sense, it tries to clearly indicate how the variables are going to be manipulated or measured and also indicates that to measure a variable, it is necessary to carry out a series of activities or procedures. It is the one that builds or adapts from others, based on the observable characteristics of the phenomenon; indicating the concrete, empirical elements or indicators of the fact to be investigated.

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Answer:

C. experimental

Explanation:

Experimental variables are the variables that are changed during the experiments to observe the effects of these changes. An experiment usually has one or more experimental variables. An experimental variable that is changed to know its impact on some other variable is called the independent variable.

In the given experiment, goldfishes were exposed to various temperature conditions to observe the effect of temperature on respiration. Therefore, both temperature and respiration rate are the experimental variables here.

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