SSS2 Math Quiz 5.2 - Standard deviation

What is the formula for percentage error?

\(\left( \frac{\text{Approximate Value} – \text{Exact Value}}{\text{Exact Value}} \right) \times 100\%\)

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Approximate Value + Exact Value

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Approximate Value – Exact Value

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Exact Value – Approximate Value

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If the exact value is 50 and the approximate value is 45, what is the percentage error?

10%

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10%

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5%

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20%

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A percentage error of 0% means:

There is an error

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The approximation is perfect

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The values are different

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The approximation is completely wrong

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Which of the following would increase the percentage error?

Decreasing the approximate value

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Increasing the exact value

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Increasing the difference between values

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Decreasing the exact value

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If the approximate value is greater than the exact value, the percentage error is:

Negative

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Positive

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Zero

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Undefined

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A smaller percentage error indicates:

A larger error

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Greater accuracy

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No error

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An exact value

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In which context is percentage error most useful?

Exact calculations

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Theoretical values

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Estimating measurements

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Random guessing

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If the exact value is 200 and the approximate value is 180, what is the percentage error?

10%

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5%

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10%

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15%

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What does a high percentage error indicate?

High accuracy

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Low accuracy

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Perfect approximation

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Acceptable margin of error

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If the approximate value is greater than the exact value, the percentage error is:

Negative

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Positive

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Zero

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Undefined

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SSS2 Math Quiz 5.2 – Standard deviation

SSS2 Math Quiz 5.2 – Standard deviation

Noah Wasiu March 13, 2025

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