Precision & Calculating ppt [Example 2]

The video tutorial explains how to determine the precision of density measurements by calculating parts per thousand. It covers calculating the average of data points, determining absolute deviations, and finding the average absolute deviation. Finally, it demonstrates how to calculate parts per thousand and assess data precision based on the result.

What is the first step in determining whether the data is precise?

• Calculate the absolute deviation

• Calculate the average of the data points

• Calculate the parts per thousand

• Calculate the standard deviation

How do you calculate the average of a set of data points?

• Add all values and multiply by the number of values

• Subtract the smallest value from the largest

• Add all values and divide by the number of values

• Multiply all values and divide by the number of values

What is the absolute deviation of a data point?

• The difference between the data point and the average, always negative

• The product of the data point and the average

• The sum of the data point and the average

• The difference between the data point and the average, always positive

How is the average absolute deviation calculated?

• By adding all absolute deviations and dividing by the number of data points

• By adding all absolute deviations and multiplying by the number of data points

• By subtracting the smallest absolute deviation from the largest

• By multiplying all absolute deviations

What is the formula for calculating parts per thousand?

• Average absolute deviation divided by the original average, multiplied by 1000

• Original average divided by the average absolute deviation, multiplied by 100

• Average absolute deviation divided by the original average, multiplied by 100

• Original average divided by the average absolute deviation, multiplied by 1000

What determines if the data is precise based on parts per thousand?

• If parts per thousand is less than 20

• If parts per thousand is greater than 50

• If parts per thousand is exactly 25

• If parts per thousand is more than 20

What is the significance of the number 1000 in the parts per thousand calculation?

• It is used to convert the result into a percentage

• It is used to convert the result into a fraction

• It is used to convert the result into parts per thousand

• It is used to convert the result into parts per million