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A researcher is trying to estimate the population mean time it takes to run a marathon. A random sample of 36 marathon runners was taken
A researcher is trying to estimate the population mean time it takes to run a marathon. A random sample of 36 marathon runners was taken from which the mean was found to be 3.42 hours. Assume the population standard deviation is known to be 0.1 hours
a) Construct a 95% confidence interval. SHOW BRIEF WORKINGS to support your answer.
b) Interpret your confidence interval.
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