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A toaster manufacturer receives large shipments of thermal switches from a supplier. A sample from each shipment is selected and tested. The manufacturer is willing to send the shipment back if the proportion of defective switches is more than 5%. Otherwise, the shipment will be kept. State the appropriate null and alternative hypotheses to be tested by the manufacturer.

A.) Ho: p=0.05 vs. Ha: p>0.05

B.) Ho: xbar=.05 vs. Ha: xbar<.05

C.) Ho: p=.05 vs. Ha: p not equal .05

D.) Ho: xbar=0.05 vs. Ha: xbar not equal 0.05

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