A scientist was asked to test the effect of a new vitamin for rats. His hypothesis was that young rats that had vitamins added to their food would gain weight faster than young rats fed a normal diet. He predicted that if young rats were fed vitamins, then they would gain more weight by the end of the experiment. He tested the effect of adding vitamins to some of the rats' diet by measuring the amount of weight each rat gained after three months. He then determined the average weight gained in each group. To analyze his results, he put the data he collected into the table shown below. Which of the following could have added bias to the data? A.Keeping the rats in the same room, but in separate cages during the experiment B.Not using all male or all female rats, since they are different sizes when grown C.Recording the data in a table instead of on a graph D.Not having the experimental results peer reviewedhttps://us-static.z-dn.net/files/db3/d65bacb8b155f3fdb42eb8aa3b010201.gif
Answers
Answer: -
B.Not using all male or all female rats, since they are different sizes when grown
Explanation: -
The scientist wanted to test his hypothesis that young rats that had vitamins added to their food would gain weight faster than young rats fed a norm.
He conducted the experiment to test out his hypothesis.
Male and female rats grow to different sizes. So if the rats used are not all of the same gender, the average change in size will not be accurate. This will lead to bias.
Keeping the rats in the same room, but in separate cages during the experiment will have no effect as long as they are fed properly.
Recording the data in a table instead of on a graph does not affect the growth.
The experimental results should be peer reviewed so that the hypothesis becomes a law. But verification of an individual hypothesis without peer review will not lead to bias.
Answer:
Explanation:
A scientist was asked to test the effect of a new vitamin for rats. His hypothesis was that young rats that had vitamins added to their food would gain weight faster than young rats fed a normal diet. He predicted that if young rats were fed vitamins, then they would gain more weight by the end of the experiment. He tested the effect of adding vitamins to some of the rats' diet by measuring the amount of weight each rat gained after three months. He then determined the average weight gained in each group. To analyze his results, he put the data he collected into the table shown below. Which of the following could have added bias to the data? A. Keeping the rats in the same room, but in separate cages during the experiment B. Not using all male or all female rats, since they are different sizes when grown C. Recording the data in a table instead of on a graph D. Not having the experimental results peer reviewed