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In a numerical analysis sense, it means you've made a mistake/forgotten to take the modulus, as the formula for error calculation involves taking modulus values:
Erel= |x-x*| / |x|, where x is the proper value, and x* an approximate value.
Percentage error is just the relative error (formula above) x100, so really if you calculate it correctly, its actually impossible to get a negative percentage error.
That aside, the only thing a negative error means, besides making a mistake, is that your approximation is larger/smaller than the real value, depending on which one you take away from, as it doesn't matter if you do x-x* or x*-x due to the modulus. The only thing that matters about any error value, is the size/number, which indicates by how much your approximation differs from the real value.
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What does a negative percentage error means?
A percentage error is 100*(measurement - true value)/true valueThe percentage error is negative if the measured (or calculated) value is smaller that the true value.
Can you have a negative as a percentage error?
Of course. Your answer can be a smidgen too big or a smidgen too small.
Under what condition will percentage error be negative?
it will be negative if the accepted value is less than the experimental value **********************2nd Opinion************ Don't you have that turned around?
How do you calculate percentage error for equipment?
Look on the equipment for where it says the plus or minus figure for accuracy (for a burette it is usually + and _ 0.1cm3) divide this by the amount you measured , times 100 to make it a percentage. ---- ---- Percentage Error = Maximum Error / Measured Value X 100 For example.Maximum Error for the following apparatus are:Balance = +/- 0.01Pippette = +/- 0.1 And the Measured value for each are:Balance = 0.15Pippette = 25 Then...the percentage error is:Balance percentage error = 0.01 / 0.15 X 100 = 66.66%Pippette percentage error = 0.1 / 25 X 100 = 0.3% You can now also work out your maximum total error.Maximum total Percentage error = Balance Percentage error + Pippette Percentage errorMaximum total percentage error = 66.66 + 0.4 = 67.06%
If a measurement is small is the percentage error high?
yes, it is. The smaller the measurement, the higher the percentage error.
What does a negative percentage error means?
A percentage error is 100*(measurement - true value)/true valueThe percentage error is negative if the measured (or calculated) value is smaller that the true value.
Can you have a negative as a percentage error?
Of course. Your answer can be a smidgen too big or a smidgen too small.
Mass of a sample measured 9.67gwhat is the percent error if the correct mass is 9.82g?
percentage error= experimental value-accepted value/ accepted value x 100 (percentage error is negative only if the accepted value is larger than the experimental value) percentage error= 9.67-9.82/9.82 x 100 percentage error= -1.6
When determining the Projected Population Change does a negative percentage indicate that the population is expected to decline?
Yes
Under what condition will percentage error be negative?
it will be negative if the accepted value is less than the experimental value **********************2nd Opinion************ Don't you have that turned around?
How would you find the estimated percentage error?
Go find out.Or:(calculated value) - (actual value)---------------------------------------- * 100(%) = percentage of error(actual value)(if the top value is negative, just switch the two or multiply by -1)
If calculating the percentage yield be more than 100 percent what does this indicate?
error in calculation or your final product is impure and has residuals of chemicals that were supposed to dissappear
How is sph measured?
Sph (sphere) is a measurement of refractive error in eyeglass prescriptions, indicating the amount of nearsightedness or farsightedness. It is measured in diopters. Positive sph values indicate farsightedness, while negative values indicate nearsightedness.
Find the percentage error in rounding 3.452 to 3.5?
Percentage Error is: ~1.4% (1.39049826188%)
How does POST indicate error?
easy
How do you calculate percentage error for equipment?
Look on the equipment for where it says the plus or minus figure for accuracy (for a burette it is usually + and _ 0.1cm3) divide this by the amount you measured , times 100 to make it a percentage. ---- ---- Percentage Error = Maximum Error / Measured Value X 100 For example.Maximum Error for the following apparatus are:Balance = +/- 0.01Pippette = +/- 0.1 And the Measured value for each are:Balance = 0.15Pippette = 25 Then...the percentage error is:Balance percentage error = 0.01 / 0.15 X 100 = 66.66%Pippette percentage error = 0.1 / 25 X 100 = 0.3% You can now also work out your maximum total error.Maximum total Percentage error = Balance Percentage error + Pippette Percentage errorMaximum total percentage error = 66.66 + 0.4 = 67.06%
What is error and percentage error?
Percentage error measures the error in relation to the quantity measured. For example if something weighs 100 grams with a possible error of plus or minus 5 grams, this is an error of 5%
