Four research teams each used a different method to collect data on how fast a new iron skillet rusts. Assume that they all agree on the sample size and the sample mean (in days). Use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation. A. Confidence Level: 99.7%; Confidence Interval: 40 to 40B. Confidence Level: 68%; Confidence Interval: 43 to 47C. Confidence Level: 95%; Confidence Interval: 40 to 50D. Confidence Level: 95%; Confidence Interval: 42 to 48
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