Confidence interval for the population proportion

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A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knows that some proportion of these spare parts will have deteriorated to the point where they are no longer usable. In order to estimate this proportion, the firm tests 75 parts, and finds that 0.25 of them are not usable. Find the 95% confidence interval for the population proportion of parts that are not usable.

Reference no: EM132167900

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