SOLUTION: A plant produces steel sheets whose weights are known to be normally distributed with a standard deviation of 2.4 kg. A random sample of 36 sheets had a mean weight of 31.4 kg. Fin
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Question 1176425: A plant produces steel sheets whose weights are known to be normally distributed with a standard deviation of 2.4 kg. A random sample of 36 sheets had a mean weight of 31.4 kg. Find a 99% confidence limits for the population mean. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! CI half interval is z(0.995)*sigma/sqrt(n)
=2.576*2.4/sqrt(36)
=1.03
the 99%CI is (30.4, 32.4) units kg
