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Math·Problem-Solving and Data Analysis·Inference from sample statistics and margin of error
hardAn inspector checked a sample of 330 scales selected at random from a population of 8,000 scales to estimate what percentage of the 8,000 scales were inaccurate. From this sample, the inspector estimated that 7% of the 8,000 scales were inaccurate, with an associated margin of error of 2.8%. Which of the following is the most appropriate conclusion?
A
It is plausible that between 336 and 784 of the scales in the population are inaccurate.
B
It is plausible that fewer than 336 of the scales in the population are inaccurate.
C
Exactly 560 of the scales in the population are inaccurate.
D
It is plausible that more than 784 of the scales in the population are inaccurate.