2.5. Statistical Analysis in Calibration

Try these first

1. 1.

   Define the term 'True Value'.

   Hint

   Think about what the true measurement should be.

2. 2.

   What is the purpose of a calibration plot?

   Hint

   Consider how plots can help show accuracy.

3. 3.

   What does the term 'True Value' refer to?

   Hint

   Think of it as what you want your measurement to reflect.

4. 4.

   Is a higher R-squared value better for calibration plots?

   • True
   • False

   Hint

   Evaluate if 'better fit' leads to better reliability.

5. 5.

   A researcher measures three known masses (1g, 5g, 10g) using a poorly calibrated balance. The reported weights were 0.9g, 4.8g, and 9.5g. What does this indicate about the calibration of the balance?

   Hint

   Compare the reported weights with the true values to assess the degree of inaccuracy.

6. 6.

   An instrument's calibration shows an R-squared value of 0.85 for a linear fit but varies widely in measurements compared to a benchmark. Discuss potential reasons and implications for the instrument performance.

   Hint

   Consider factors that can affect instrument readings beyond just the calibration itself.