To estimate the percentage of defects in a recent manufacturing batch, a quality control manager at toyota selects every 19th car that comes off the assembly line starting with the ninth until she obtains a sample of 120 cars.
what type of sampling is used?
(a) simple random
(b) systematic
(c) cluster
(d)convenience
(e) stratified

1. gar principles or "the principles"are intended to do what?

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"in my opinion, we ought to stop making our own drums and accept that outside supplier's offer," said wim niewindt, managing director of antilles refining, n.v., of aruba. "at a price of $21 per drum, we would be paying $4.70 less than it costs us to manufacture the drums in our own plant. since we use 70,000 drums a year, that would be an annual cost savings of $329,000." antilles refining's current cost to manufacture one drum is given below (based on 70,000 drums per year):