You work in an analytical testing lab and have been asked by your supervisor to purchase new pH meters to replace your old supply. You have identified four potential suppliers and now need to evaluate the performance of each pH meter.
You obtained a solution with a known pH of 5.5. You performed 10 replicate
measurements of the pH of that known solution using each of the four different pH meters and obtained the data shown below.

All other factors being equal (cost, ease of use, etc), which brand would you suggest the lab purchase? Explain your reasoning.

I will suggest the pH meter brand B the lab to purchase because the readings of this pH is more accurate as compared to other three pH meters. The pH meter brand B provides data which is closer to the known pH of the solution.

While on the other hand, pH meter brand A, C and D gives less accurate data in which more error is present in the data so we can conclude that the pH meter brand B is the most accurate pH meter as compared to other pH meter.

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