destinybowers18
10.07.2019 •
Mathematics
In a simple random sample of 52 electronic components produced by a certain method, the mean lifetime was 1,050 hours. assume that component lifetimes are normally distributed with population standard deviation 193 hours. what is the upper bound of the 95% confidence interval for the mean lifetime of the components?
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Ответ:
12.5
Step-by-step explanation:
U simply divide 500/ 40