The mass of a 25.850g piece of copper is measured three times with two different balances...

The mass of a 25.850g piece of copper is measured three times with two different balances with following results

Trial Method 1 (g)

1) 25.747

2) 25.745

3) 25.748

Trial Method 2 (g)

1) 25.70

2)25.75

3) 25.71

c. Calculate the % error for each method. method 1 _________ method 2 _________ Which method is more precise? Explain your answer.

Thank you

Solutions

Expert Solution

standard deviation can be used to check accuracy or precision. if you are checking deviation from actual value you are checking accuracy. if you are taking deviation from mean in calculation you will get precision.

in the above solution i have calculated %error by taking deviation from actual value in the method standard deviation so it gives accuracy. while in next calculation for precision i have taken another method mean absolute deviation

queen_honey_blossom answered 1 year ago

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