Chapter 1 LearningCurve. Bio 1010-05

One of your friends is reading a newspaper article, which notes that, in rats, a positive significant relationship exists between sugar consumption and obesity. The more sugar a rat consumes, the higher its overall body mass. Your friend asks you what it means that the results of this experiment were statistically significant. What do you tell him? 1.) The fact that rats that consume more sugar have higher body masses could be due to chance, or could not be due to chance. Both possibilities are equally likely. 2.) The sample size of rats in this study was remarkably small, but no more studies are needed to evaluate the relationship between rat sugar consumption and body mass. 3.) The fact that rats that consume more sugar have higher body masses is not due to chance. 4.) The fact that rats that consume more sugar have higher body masses is purely due to chance.

3.) The fact that rats that consume more sugar have higher body masses is not due to chance.

In an experiment, the only difference between the control group and the experimental group is the _____ variable. 1.) dependent 2.) control 3.) evidence-based 4.) independent 5.) experimental

4.) independent

A newspaper has recently received several complaints regarding the accuracy of its reports on scientific studies. As a result, newspaper's editors have posted an ad seeking a new science journalist. What steps are NOT important for the newspaper to take to ensure that the new science journalist can produce accurate articles? 1.) Hire someone with a scientific background, who has experience reviewing research papers. 2.) Ensure that the new science journalist has an adequate amount of time to thoroughly review research papers before writing an article. 3.) Ensure that the size they allowed for the new science journalist's column is large enough to explain all parts of a scientific study. 4.) Ensure that the new science journalist understands the difference between causation and correlation, and can emphasize this difference to newspaper readers. 5.) Ensure that the new science journalist has an advanced degree in a scientific discipline and regularly acts as a peer reviewer for scientific journals.

5.) Ensure that the new science journalist has an advanced degree in a scientific discipline and regularly acts as a peer reviewer for scientific journals.

Statistically significant results are more likely to be obtained from experiments that _____. 1.) have a small sample size 2.) have a large experimental group and a small control group 3.) were interpreted by "eye-balling" the data and looking for obvious differences between the groups 4.) have all subjects in the experimental group 5.) have a large sample size in both groups

5.) have a large sample size in both groups

You examine several studies on the effect of a new drug to treat diabetes. Which study(ies) would give you the most confidence in the results? Please choose the correct answer from the following choices, and then select the submit answer button. 1.) one study with 50 people 2.) one study with 500 people 3.) one study with 1,000 people 4.) three studies done the same way, each with 50 people 5.) three studies done the same way, each with 1,000 people

5.) three studies done the same way, each with 1,000 people