Percent Error

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What is Percent Error?

Back

Percent Error is a measure of how inaccurate a measurement is, compared to the true value, expressed as a percentage.

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How do you calculate Percent Error?

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Percent Error = (|Estimated Value - Actual Value| / Actual Value) x 100%.

Front

If Zed estimated 350 chips but found 210, what is the percent error?

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Percent Error = (|350 - 210| / 210) x 100% = 67% (negative indicates underestimation).

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Mr. Nacerino estimated 48 minutes for 8 miles but took 60 minutes. What is his percent error?

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Percent Error = (|48 - 60| / 60) x 100% = 20%.

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What does a negative percent error indicate?

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A negative percent error indicates that the estimated value is less than the actual value.

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If the estimated attendance was 15,000 but only 12,500 attended, what is the percent error?

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Percent Error = (|15000 - 12500| / 15000) x 100% = 20% (negative indicates underestimation).

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Jessie estimated her cat's weight at 8 pounds, but it was actually 10 pounds. What is the percent error?

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Percent Error = (|8 - 10| / 10) x 100% = 20%.

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Bob estimated 200 concert attendees, but 300 actually attended. What is the percent error?

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Percent Error = (|200 - 300| / 300) x 100% = 33%.

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What is the significance of Percent Error in real-life applications?

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Percent Error helps assess the accuracy of estimates and predictions in various fields such as science, engineering, and economics.

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What is the difference between absolute error and percent error?

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Absolute error is the difference between the estimated and actual values, while percent error expresses this difference as a percentage of the actual value.