Mathematics, 21.04.2020 17:17 dmorinville8

A brand of refrigerators, denoted A is guaranteed for 1 year. In a random sample of 50 refrigerators of brand A, 12 were observed to fail before the guarantee period ended. Estimate the true proportions of failures during the guarantee period, with 98% confidence interval. State the conclusion sentence and find the point estimator for the population proportion.

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A brand of refrigerators, denoted A is guaranteed for 1 year. In a random sample of 50 refrigerators...

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