Analyzing Data and Drawing Conclusions

Question 1

A student wants to find out if aspirin helps keep cut flowers fresh. She wants to set up an experiment to test this, but first, she must set up the hypothesis.Which statement is the best hypothesis to test the question she is asking?

Revolt · Accepted Answer

C: If an aspirin is added to the water in a vase of daffodils, then the flowers’ wilting time will not change because aspirin has no effect on the wilting time of daffodils.

Question 2

Which elements should be controlled variables for this experiment? Check all that apply.

Revolt · Accepted Answer

B: timing of experiment; D: environmental light; E: amount of nutrients; F: environmental temperature

Question 3

Identify the control group in this experiment.

Revolt · Accepted Answer

B: duckweed at pH 7

Question 4

What is the sample size in this study?

Revolt · Accepted Answer

C: 10

Question 5

In which situation has the independent variable for the experiment been changed?Check all that apply.

Revolt · Accepted Answer

C: changed from testing the effect of pH on duckweed growth to testing the effect of light levels on duckweed growth; D: changed from testing the effect of acid pH on duckweed growth to testing the effect of basic pH on duckweed growth

Question 6

Of these four scientific designs, choose the one that has a biased design.

Revolt · Accepted Answer

A: In a study to determine how bees react to color, both color and light levels are varied.

Question 7

Some carbon dioxide released by human activity dissolves in the oceans and increases ocean acidity. Corals are very sensitive to changes in pH. A scientist wants to study the effect of increasing ocean acidity on coral reef structure and survival.

Revolt · Accepted Answer

A: limitation due to time needed to do the experiment; B: limitation due to the system being too large or small; C: limitation due to cost or equipment for the experiment; D: limitation due to ethical concerns about experimental subjects

Question 8

Identify the experimental group in this experiment.

Revolt · Accepted Answer

A: duckweed at pH 5

Question 9

How many replications of the study are done?

Revolt · Accepted Answer

B: 5

Question 10

When doing final statistics on the study, how many tomato plants can be analyzed for each group?

Revolt · Accepted Answer

D: 50

Analyzing Data and Drawing Conclusions Answers

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