Random Sample


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A random sample of 94 light bulbs had a mean life of x bar=587 hours. The standard deviation of the lifetime of all such light bulbs is of ?=36 hours. a) Construct a 90% confidence interval estimate of the mean life, ?, of all light bulb... May 09 2012 05:47 PM


Solution ID:609235 | This paper was updated on 26-Nov-2015

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