Answer:variable interval
Explanation:
In operant conditioning, a variable-interval schedule is defined as that schedule in which a response is received after unpredicted time , because reinforcement has been administered in diffrent non fixed times. The response is slow and steady. Variable means non fixed time which means reinforcement can occur at any time , using various different time zone. Interval refers to time hence this means reinforcement is administered at various times.
During the third step of the scientific method, when researchers test the hypothesis, they conduct <u>empirical research</u>.
<h3>What is the 3rd step in
scientific method?</h3>
Basically, the scientific method refers to the process of objectively establishing facts through testing & experimentation. It involves the process of making an observation, forming a hypothesis, making a prediction, conducting an experiment, analyzing the results etc.
The third step in the scientific method is the need to collect and analyze data, that is, the testing of hypotheses by conducting Empirical research by collecting and analyzing data.
Hence, when researchers test the hypothesis, they conduct <u>empirical research</u>.
Read more about Empirical research
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A. Not true. Rural areas are usually poorer than major cities.
B . Not true, they're both some of the top cities in terms of economic development.
C. True.
D. Not exactly true. China has indeed banned low grade coal, but not all coal.
B I think it a or c or d lol I don’t know
