A Manufacturer Receives a Shipment of 170 Laptop Computers of Which

question 108

Multiple Choice

A manufacturer receives a shipment of 170 laptop computers of which 9 are defective. To test the shipment, thequality control engineer randomly selects 10 computers from the shipment and tests them. The randomvariable X represents the number of defective computers in the sample. What are the mean and standarddeviation of the random variable X?

• A) \(\mu \chi = 0.529 , \sigma \chi = 0.689\)
• B) \(\mu _ { X } = 0.529 , \sigma X = 0.708\)
• C) \(\mu _ { X } = 0.053 , \sigma _ { X } = 0.689\)
• D) \(\mu _ { X } = 0.529 , \sigma X = 0.475\)

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