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A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random sample of 250 machines is taken, and 82 of the machines

A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random sample of

250

machines is taken, and

82

of the machines in the sample malfunction. Based upon this, compute a

99%

confidence interval for the proportion of all X-ray machines that malfunction. Then find the lower limit and upper limit of the

99%

confidence interval.

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