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7 Cards in this Set
- Front
- Back
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How did you carry out random sampling? |
Used any method that didn't involve any element of conscious choice. |
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Why did you use random sampling in your procedure? |
Allows me to use statistical tests. Removes bias. Gives a representative sample. |
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Is it possible to conclude from your data? |
Is the sample size large enough? Has a statistical test been carried out? Is it representative? |
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Why is it more useful to know the standard deviation as opposed to the single variable (e.g. length)? |
Involves all lengths, not just a single one. Shows the spread of all the lengths. |
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Why did you leave your set up for a length of time before beginning to record measurements/observations. |
To allow the measured/observed variable to become constant. |
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What kind of variables did you need to control? |
Temperature. Species of organism/Mass of substance. Concentrations of solutions. pH of solutions. Light intensity. Anything that isn't the independent variable |
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Why did you use a control variable in your experiment? |
To ensure that only the independent variable affected the results/dependent variable. |
