Bob and Pat measured the amount of lead (Pb) in the water taken from their kitch
ID: 535690 • Letter: B
Question
Bob and Pat measured the amount of lead (Pb) in the water taken from their kitchen faucet Each of them measured the lead content three times. The average and the standard deviation of each one's measurements are as follows.: Bob's average and standard deviation: 1.7 plusminus 0.02 ppb Pat's average and standard deviation: 1.7 plusminus 0.05 ppb Which statement is correct? If you can't answer, read the section on "accuracy and precision" in Chapter 1 in the textbook or the lecture notes before you work on this question. Bob's measurement is more accurate than Pat's. Pat's measurement is more accurate than Bob's. Bob's measurement is more precise than Pat's. Pars measurement is more precise than Bob's. Bob's measurement is more accurate and precise than Pat's Pat's measurement is more accurate and precise than Bob's.Explanation / Answer
Bob's measurement is more precise and accurate because the values measured are close to accurate value as well as closer to the earlier measured value. Hence, Option e) is correct, i.e.,Bob's measurement is more precise and accurate than Pet's