Calculating Percent Error and Average Deviation in Experimental Results

The video tutorial explains the concepts of percent error and average deviation. It begins with calculating percent error by finding the difference between experimental and correct values, then dividing by the correct value and multiplying by 100. The tutorial then covers average deviation, which measures precision by averaging the deviations of each measurement from the mean. It also explains percent deviation, calculated by dividing average deviation by the mean and multiplying by 100. The video concludes by distinguishing between precision and accuracy, emphasizing that percent error measures accuracy while average deviation measures precision.

What is the first step in calculating percent error?

• Determine the difference between experimental and theoretical values.

• Find the average of the theoretical values.

• Multiply the experimental value by 100.

• Add the experimental and theoretical values.

If the experimental value is 1.18 and the theoretical value is 1.30, what is the percent error?

• 0.12%

• 12%

• 1.3%

• 9.2%

What does average deviation measure?

• Experimental error.

• Theoretical correctness.

• Precision of the measurements.

• Accuracy of the measurements.

How do you calculate the average deviation?

• By dividing the total deviation by the number of measurements.

• By finding the difference between the highest and lowest values.

• By multiplying the average deviation by 100.

• By averaging the deviations of each measurement from the average.

What is the percent deviation if the average deviation is 0.053 and the average value is 1.18?

• 5.3%

• 1.18%

• 0.45%

• 4.5%

Which measurement is affected by the value 1.26 in the example?

• Theoretical value

• Percent error

• Experimental value

• Average deviation

What should you compare each measurement to when calculating average deviation?

• The average of the measurements

• The highest measurement

• The real answer

• The theoretical value

What does percent error measure?

• Precision of the measurements

• Theoretical correctness

• Deviation from the average

• Accuracy of the measurements

Which of the following is true about precision?

• It measures how close the measurements are to each other.

• It is irrelevant to experimental results.

• It measures how close the measurements are to the theoretical value.

• It is calculated using percent error.

What is the main difference between accuracy and precision?

• Both accuracy and precision are about consistency.

• Both accuracy and precision are about closeness to the theoretical value.

• Precision is about closeness to the theoretical value, accuracy is about consistency.

• Accuracy is about closeness to the theoretical value, precision is about consistency.