Suppose the annual maximum stream flow of a given river has been observed for 10 years...
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Suppose the annual maximum stream flow of a given river has been observed for 10 years yielding the following statistics: Sample mean: 10 m/h Sample variance: 9x10 (m\h) (a) Establish the two-sided 90% confidence interval on the mean annual maximum stream flow. Assume a normal population. (b) If the desired to estimate the mean annual maximum stream flow to within +30000 m/h with 90% confidence, how many additional years of observation will be require? Assume the sample variance based on the new set of data will be approximately 9x108 (m\h). Suppose the annual maximum stream flow of a given river has been observed for 10 years yielding the following statistics: Sample mean: 10 m/h Sample variance: 9x10 (m\h) (a) Establish the two-sided 90% confidence interval on the mean annual maximum stream flow. Assume a normal population. (b) If the desired to estimate the mean annual maximum stream flow to within +30000 m/h with 90% confidence, how many additional years of observation will be require? Assume the sample variance based on the new set of data will be approximately 9x108 (m\h).
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Fundamentals of quality control and improvement
ISBN: 978-0470226537
3rd edition
Authors: amitava mitra
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