A laboratory sample of gas is known to have a carbon monoxid

A laboratory sample of gas is known to have a carbon monoxide (CO) concentration of 50 ppm. A spectrophotometer is used to take 4 independent measurements of this concentration. The 4 measurements are: 10, 50, 90, and 50. Circle the following statement that best describes this measuring process. Accurate but not precise Precise but not accurate Both accurate and precise

Solution

Since average of measurement is 50 ppm,therefore process is accurate but not precise as measurements are spread throughout the scale.

therefore, Accurate but not precise.