A quality control engineer knows from past experience that the mean weight for ball bearings is 7.4
Question:
A quality control engineer knows from past experience that the mean weight for ball bearings is 7.4 oz with a standard deviation of 1.2 oz. Suppose the engineer draws a random sample of 20 ball bearings. What is the probability that the mean of the sample will be greater than 8.0 oz?
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Given Mean weight of ball bearings 74 oz Standard deviation of weight 12 oz Sample size n 20 Sample ...View the full answer
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Ali Khawaja
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Related Book For 
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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