2.7 How Valid is the Data? Flashcards

1
Q

Why can investigations about distribution of organisms in their environment be very difficult?

A

They are usually done over a very long time and not all variables can be controlled

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2
Q

Name a control variable of the transect test?

A

Time of day

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3
Q

Why must all possible variables be controlled in a valid investigation?

A

To make sure each test has the same conditions so it is only the independent variable that is being tested

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4
Q

What makes a measurement repeatable?

A

If the original experimenter repeats the investigation and gets the same results

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5
Q

What makes a measurement reproducible?

A

If someone else can be repeated by someone else or use a different method/equipment and get the same results

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6
Q

Why is sample size important?

A

To get representative results, the larger the sample size, the more we trust we can have in the data from the tests

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