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

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

 

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.

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 December 22, 20169 yr by StringJunky

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.

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

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.

Do you mean the error that occurred in measurement?

 

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

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

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.