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A random sample of size 16 valves from a normal population showed a mean of 53 and a sum of squares of deviation from the

A random sample of size 16 valves from a normal population showed a mean of 53 and a sum of squares of deviation from the mean equals to 150. Can this sample be regarded as taken from the population having 56 as mean? Obtain 95% confidence limits of the mean of population.

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