Which statement supports the use of larger, diverse samples in a study?

Question

Group of answer choices

The amount of data able to be collected from a small sample may be insufficient.

The study will be over too soon to gather sufficient data.

Fellow scientists are less likely to believe a study that uses a small sample.

The traits of the sample members may differ randomly from the traits of the population as a whole.

Flag question: Question 2
Question 21 pts
Two scientists in British Columbia are counting trout spawning grounds (called redds) along 5 km of a stream. The presence of milky-colored fish spawn indicates a redd. The scientists walk together, surveying the same areas.

What is the most likely reason for them to count different numbers of redds?

Group of answer choices

Some places look as if they might or might not be redds, and different scientists identify them differently.

The two scientists study different sections of the stream.

The number of redds is too small a sample to be counted accurately.

The satellite sensor that is collecting data from the stream is malfunctioning.

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Question 31 pts
What is a convention (standard) of graph making?

Group of answer choices

Dependent variables are omitted.

The independent variable is on the x-axis.

The data must be capable of being plotted as a straight line.

There must be at least 10 numbers on each axis.

Flag question: Question 4
Question 41 pts
A student is graphing the decline in the North American frog population over 10 years.

Which action might distort a reader’s interpretation of the graph?

Group of answer choices

The student uses colors instead of black ink.

The student put their data points at five-year intervals instead of one-year intervals.

The student obtained their data from a previously published scientific article.

The student's use a bar graph instead of a line graph.

Flag question: Question 5
Question 51 pts
Why are instant data, such as the number of rabbits in a field at one time, not usually as reliable as long-term data, such as the average number of rabbits in the field over 10 years?
Group of answer choices

Collectors of instant data often do not know where to find them.

One data point is not as good as multiple data points, since the one data point might not be representative.

People may disagree in their interpretations of instant data.

Instant data are only collected by one person.

Answer 1

Here are the answers to the questions based on the provided options:

Question 1: Which statement supports the use of larger, diverse samples in a study?

• Answer: The traits of the sample members may differ randomly from the traits of the population as a whole.

Question 2: What is the most likely reason for them to count different numbers of redds?

• Answer: Some places look as if they might or might not be redds, and different scientists identify them differently.

Question 3: What is a convention (standard) of graph making?

• Answer: The independent variable is on the x-axis.

Question 4: Which action might distort a reader’s interpretation of the graph?

• Answer: The student put their data points at five-year intervals instead of one-year intervals.

Question 5: Why are instant data, such as the number of rabbits in a field at one time, not usually as reliable as long-term data, such as the average number of rabbits in the field over 10 years?

• Answer: One data point is not as good as multiple data points, since the one data point might not be representative.

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