1. A laboratory sample of gas is known to have a carbon monoxide (CO) concentrat

Question

1. A laboratory sample of gas is known to have a carbon monoxide (CO) concentration of 50 parts per million (ppm). A spectrophotometer is used to take three independent measurements of this concentration. The three measurements, in ppm, are 49, 51, and 50.

Estimate the bias in a spectrophotometer measurement.

2. A laboratory sample of gas is known to have a carbon monoxide (CO) concentration of 50 parts per million (ppm). A spectrophotometer is used to take three independent measurements of this concentration. The three measurements, in ppm, are 49, 51, and 50.

Estimate the uncertainty in a spectrophotometer measurement.

(SHOW ALL STEPS CLEARLY AND NEATLY).

Explanation / Answer

three measurements are regarded as a random sample from the population of possible measurement.

the bias is equal to the mean of this population minus the true value of 50.

bias=mean of three

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