TABLE 14-7 A Supplier of Silicone Sheets for Producers of Computer Chips

question 21

Short Answer

TABLE 14-7
A supplier of silicone sheets for producers of computer chips wants to evaluate her manufacturing process. She takes samples of size 5 from each day's output and counts the number of blemishes on each silicone sheet. The results from 20 days of such evaluations are presented below.

She also decides that the upper specification limit is 10 blemishes.
-Referring to Table 14-7, an chart is to be used for the number of blemishes. One way to obtain the control limits is to take the grand mean and add and subtract the product of A₂ times the mean of the sample ranges. For this data set, the value of A₂ is ________.

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Definitions:

freshwater Stickleback

A small fish found in freshwater environments, often used in studies of evolution, ecology, and behavior.

Bighorn Sheep

A species of sheep native to North America, known for its large horns and rugged mountain habitats.

Horn Length

A measure of the length of the keratinous projections found on the heads of certain animals, such as deer and cattle, often used in mating displays and defense.

Directional Selection

A form of natural selection where one extreme phenotype is favored over other phenotypes, leading to a shift in the population’s phenotype distribution.