Which of the following formulas represents the standard deviation of the sampling distribution of the sample mean?

• A.#x# = # / #n
• B.#x# = # × #n
• C.#x# = n / #
• D.#x# = #n / #

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A Belt working in a supply chain environment has to make a decision to change suppliers of critical raw materials for a new product upgrade. The purchasing manager is depending on the Belt's effort requiring that the average cost of an internal critical raw material component be less than or equal to $3,800 in order to stay within budget. Using a sample of 38 first article components, a Mean of the new product upgrade price of $3,680, and a Standard Deviation of $120 was estimated. In order to increase the Long Term Z value to 5, what is the maximum long term variation in pricing the Belt can accept for his upgraded critical raw material component?

• A.$48
• B.$12
• C.$24
• D.$6

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This table displays the inventory of fasteners in a storage cabinet. An item is selected at random from the fastener cabinet. Find the approximate probability it is a 1/2 inch bolt.

• A..09
• B..35
• C..30
• D..65
• E.none of the above

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Following process modifications, the Null Hypothesis states that no improvement to the process has occurred. If we discover the Null Hypothesis Test was rejected when it was false that would be a(n)
________________________.

• A.Type II Error
• B.Alpha Error
• C.Type I Error
• D.Type III Error

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An full factorial experiment has three factors. Each factor has three levels. The number of test combinations or runs is:

• A.27
• B.36
• C.6
• D.33
• E.9

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