A Company That Manufactures Health Food Snacks Produces Low Sodium

question 16

Essay

A company that manufactures health food snacks produces low sodium rice chips. To monitor the process for sodium levels, chips are selected periodically and the amount of sodium (mg) measured. For each of thirty samples consisting of 8 chips, the mean and range in sodium content is determined. The average of the means across all samples is 55 mg and the average range is 2.2 mg.
a. Estimate the process standard deviation.
b. Calculate the centreline and control limits for the R chart.
c. Calculate the centreline and control limits for the x-bar chart.

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Definitions:

Plasma

The liquid component of blood, in which blood cells are suspended, consisting of water, salts, and proteins.

Iron Supplement

A dietary supplement used to increase the amount of iron in the body, often prescribed for anemia.

Constipated

A condition where an individual has difficulty in evacuating bowels, often leading to infrequent and/or painful elimination.

Side Effect

An unwanted or unexpected reaction to a medication or treatment that occurs in addition to the desired therapeutic effect.