The proportion of defective radios in the sample is 5/50 = 0.1.
Assuming the same proportion holds true for the delivery of 200 radios, the predicted number of defective radios is 0.1 * 200 = 20. Therefore, the best prediction of the number of defective radios in a delivery of 200 radios is 20.
A RADIO HUT QUALITY INSPECTOR EXAMINES A SAMPLE OF 50 RADIOS AND FINDS THAT 5 ARE DEFECTIVE. WHAT IS THE BEST PREDICTION OF THE NUMBER OF DEFECTIVE RADIOS IN A DELIVERY OF 200 RADIOS?
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