# What is this symbol?

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What does this symbol mean? I pointed to it using the red color.

http://www5.0zz0.com/2016/12/22/18/706933985.jpg

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Plus or minus.

So 5 pluss or minus 2 means either 3 or 7, normally this implies the error bars. So the number is in the range of 3 to 7 but we measured 5.

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Plus-minus. If some device is, say, 6 volts plus-minus 1 volt it means that it is 6v within a variation of 1v either side.

Edited by StringJunky

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Its the plus-or-minus sign. You will see such signs typically in the overroot of a perfect square, and also in the quadratic equation formula.

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Plus or minus.

So 5 pluss or minus 2 means either 3 or 7, normally this implies the error bars. So the number is in the range of 3 to 7 but we measured 5.

Do you mean the error that occurred in measurement?

Plus-minus. If some device is, say, 6 volts plus-minus 1 volt it means that it is 6v within a variation of 1v either side.

Its the plus-or-minus sign. You will see such signs typically in the overroot of a perfect square, and also in the quadratic equation formula.

Thanks

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Do you mean the error that occurred in measurement?

Yes, for the most part. But can be interpreted more broadly than that. A errors may come from other sources such as the error in constants.

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Do you mean the error that occurred in measurement?

Uncertainty might be a better word. All measurements have a limited precision.

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Yes, for the most part. But can be interpreted more broadly than that. A errors may come from other sources such as the error in constants.

Uncertainty might be a better word. All measurements have a limited precision.

Thanks

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The plus-minus sign (±) is a mathematical symbol with multiple meanings. Their use has been extended to many other meanings, more or less analogous. Plus and minus are Latin terms meaning "more" and "less", respectively.

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