It is important to control the net weight of a packaged

Chapter 9, Problem 3E

(choose chapter or problem)

It is important to control the net weight of a packaged item; thus, items are selected randomly throughout the day from the production line and their weights are recorded. Use the following 20 sets of 5 weights (in grams) for this exercise (note that a weight recorded here is the actual weight minus 330):

(a) Calculate the values of \(\overline{\bar{x}}, \bar{s}\), and \(\bar{R}\)

.

(b) Use the values of \(A_{3}\) and \(\bar{s}\) to construct an \(\bar{x}\) chart.

(c) Construct an \(s\) chart.

(d) Use the values of \(A_{2}\) and \(\bar{R}\) to construct an \(\bar{x}\) chart.

(e) Construct an \(R\) chart.

(f) Do the charts indicate that these fill weights are in statistical control?

Equation Transcription:

,

Text Transcription:

Over line Bar x, bar s

Bar R

A_3  

s

A_2

R