Explain why researchers formulate a null hypothesis in addition to a hypothesis when designing an experimental study.

If I perform a hypothesis test in which I demonstrate that the prediction I made in question 5 is true, I have ________.

a. Proved the hypothesis

b. Supported the hypothesis

c. Not falsified the hypothesis

d. B and C are correct

e. A, B, and C are correct

Which of the following is an example of qualitative data?

a. The fish swam in a zigzag motion.

b. The contents of the stomach are mixed every 20 seconds.

c. The temperature decreased from 20°C to 15°C.

d. The six pairs of robins hatched an average of three chicks each.

Which sentence best describes the logic of scientific inquiry?

a. If I generate a testable hypothesis, tests and observations will support it.

b. If my prediction is correct, it will lead to a testable hypothesis.

c. If my observations are accurate, they will support my hypothesis.

d. If my hypothesis is correct, I can expect certain test results.

Which of the following is a true statement of observational data?

a. It is always qualitative, not quantitative.

b. It is used to form hypotheses, but not to test them.

c. It can include comparisons of fossils as well as DNA sequences.

d. It is the type of data used for the independent variable in a controlled experiment.

Which of the following best describes the logic of scientific inquiry?

a. If I generate a testable hypothesis, my experiments will support it.

b. If my prediction is correct, it will lead to a testable hypothesis.

c. If my observations are accurate, they will support my hypothesis.

d. If my hypothesis is correct, I can expect certain test results.

A friend tells you that the theory of evolution is just an educated guess by biologists about how things work. Evaluate this statement.

A primary source of scientific results is ________.

a. The news media.

b. Anecdotes from others.

c. Articles in peer-reviewed journals.

d. The Internet.

e. All of the above.