Question

thinkness of glass plate is measured. values obtained are 1.36cm, 1.38cm, 1.35cm, 1.34cm. find percentage error?​

Answer 1

Answer:

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Answer 2

Given :

Thickness of glass plate is measured are 1.36cm, 1.38cm, 1.35cm, 1.34cm.

To find :

Percentage error

Solution :

Average value = Sum of all the values / Total no. of values

$Avg = \frac{1.36cm + 1.38cm + 1.35cm + 1.34cm}{4}$

Avg = 5.43 / 4

Avg = 1.3575

$AvgDev = \frac{|x_1-x|+|x_2-x|+|x_3-x|+|x_4-x|}{4}$

$AvgDev =\frac{ |1.36-1.3575|+|1.38-1.3575|+|1.35-1.3575|+|1.34-1.3575|}{4}$

$AvgDev = \frac{0.0025+0.0225+0.0075+0.0175}{4}$

AvgDev = 0.05 / 4

AvgDev = 0.0125

$PercentageError = \frac{0.0125}{1.3575} * 100$

Percentage error = 0.92%