You Are Developing an "X-Bar" Chart Based on Sample Means

question 27

Multiple Choice

You are developing an "X-bar" chart based on sample means.You know the standard deviation of the sample means is 4,the desired confidence level is 99.7 percent and the average of the sample means is 24.Which of the following is your UCL?

• A)36
• B)24
• C)12
• D)4
• E)None of the above

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Definitions:

Felsic

Describes igneous rocks that are rich in light-colored minerals such as quartz and feldspars.

Volcanic Breccia

A type of rock composed of large volcanic fragments, often formed during explosive volcanic eruptions.

Pyroclastic Flow

A fast-moving current of hot gas and volcanic materials (such as ash and lava fragments) that flows along the ground after an eruption, capable of causing destruction.

Flow-Banded Obsidian

A type of obsidian characterized by the alignment of mineral grains or layers along the flow direction of the lava.