Looking at data - tables with repeats Flashcards

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1
Q

Repeating an experiment will make our results more…

A

reliable

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2
Q

Why does repeating an experiment make results more reliable?

A

because it is easier to spot anomalies (mistakes)

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3
Q

Circle the anomaly on this graph

A
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4
Q

What is an anomaly?

A

A result that does not follow the pattern of the other results

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5
Q

What can cause anomalies?

A

Human error (mistakes when measuring)

Faulty equipment

Different people measuring

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6
Q

What is the independent variable in this experiment?

A

The type of worm (the left hand column heading)

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7
Q

What is the dependent variable in this experiment?

A

The number of worms left (the right hand column heading)

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8
Q

How has the mean number of red worms been calculated?

A

Add the number of red worms eaten on each day and divide by how many days there are.

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9
Q

Which type of graph will you plot for these results?

A

Bar chart because the independent variable is a label (colour of worm)

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10
Q

Which column will you put along the x axis?

A

Colour of worm (independent variable always goes on X axis)

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11
Q

Which column will you put along the Y axis?

A

Number of worms left (dependent variable always goes on Y axis)

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12
Q

Would you plot the results from every day?

A

No, only plot the mean values

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13
Q

Why do we only plot the mean values?

A

Becuase they are more reliable as they take into account all of the repeat values.

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