A person gets on and off a bathroom scale four times.The four readings (in pounds) are 148, 151, 150, and 152. Each time after the person gets off the scale, the reading is 2 lb.
a. Is it possible to estimate the uncertainty in these measurements? If so, estimate it. If not, explain why not.
b. Is it possible to estimate the bias in these measurements? If so, estimate it. If not, explain why not.
(a) Yes, the uncertainty can be estimated with the standard deviation of the four measurements, which is 1.71.
(b) Yes, the bias can be estimated to be 2 pounds, because the reading is 2 pounds when the true weight is 0.
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