An article in Technometrics (1999, Vol. 41, pp. 202€“ 211) studied the capability of a gauge by measuring the weight of paper. The data for repeated measurements of one sheet of paper are in the following table. Construct a 95% one-sided upper confidence interval for the standard deviation of these measurements. Check the assumption of normality of the data and comment on the assumptions for the confidence interval.

Transcribed Image Text:

Observations 3.485 3.464 3.477 3.481 3.448 3.475 3.472 3.470 3.474 3.472 3.473 3.477 3.470 3.472 3.470