Confidence interval of a true mean weight
The average weight of 60 randomly selected compact automobiles was 2620 pounds. The sample standard deviation was 430 pounds. What is the 95% confidence interval of a true mean weight, m, in pounds, of the automobiles?
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A company produces the latest model of camera in large quantity. From past record, the defective rate is known to be 5%. Everyday, the company will sample a batch of 20 cameras to check for manufacturing error. Assuming that the number of defectiv
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