What is standard deviation of the sampling distrbution

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Reference no: EM132250610

1. Which of the following is not an example of a high-volume system?

A. commercial donut baking

B. waste treatment

C. petroleum refining

D. magazine printing

E. aircraft manufacturing

2. The more __________ demand is, the more the aggregate plan will tend to reflect the ____________ strategy.

A. stable; level

B. aggregated; outsourcing

C. variable; chase

D. complex; uncommitted

E. both A. and C.

3. A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:

Sample Service Life (hours)

1 495 500 505 500

2 525 515 505 515

3 470 480 460 470

4. What is the standard deviation of the sampling distrbution of sample means for whenever service life is in control?

A. 5 hours

B. 6.67 hours

C. 10 hours

D. 11.55 hours

E. 20 hours

Reference no: EM132250610

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