Question

A student is conducting their science experiment on the effect of caffeine on dogs. He has 3 groups of test subjects.
The 1st group of dogs receives plain water. The 2nd group of dogs receives 10 mg of caffeine each, and the 3rd
group receives 50 mg of caffeine each. He will measure their activity levels by recording how long each dog runs
without stopping, after giving them the pills. What could be evaluated in this experiment to ensure reliability?
A. If the dogs are different breeds, their activity levels could be different because of their breed and not the caffeine.
• B. The test subjects are dogs and not people, so their data is unreliable.
C. The different amounts of caffeine given could lead to different activity levels which would throw off the result of the experiment.
C D. The group that receives water will be an outlier and throw off the best fit line.

Answer 1

If the dogs are different breeds, their activity levels could be different because of their breed and not the caffeine. The correct option is A.

Reliability of experiments

In order for the outcomes of scientific experiments to be reliable, constant variables should be kept constant.

In the illustrated experiments, the breed and age of the experimental dogs have to be the same. It is one of the variables that have to be kept constant throughout the experiment.

If the dogs are different breeds, their activity levels could be different because of their breed and not the caffeine. The same thing is applicable to different ages.

Thus, evaluating this variable and doing right by it will ensure reliability.

More on the reliability of results can be found here: https://brainly.com/question/1873979

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