Flowrates in Urban Sewer Systems Flow meters are installed
Chapter 8, Problem 8.6.24(choose chapter or problem)
Flowrates in Urban Sewer Systems Flow meters are installed in urban sewer systems to measure the ows through the pipes. In dry weather conditions (no rain) the ows are generated by waste water from households and industries, together with some possible drainage from water stored in the topsoil from previous rainfalls. In a study of an urban sewer system, the values given in DS 8.5.1 were obtained for owrates during dry weather conditions. (a) What is the sample mean? (b) What is the sample median? (c) What is the sample standard deviation? (d) Construct a 99% two-sided condence interval for the average owrate under dry weather conditions. (e) Construct a 95% one-sided condence interval that provides an upper bound for the average owrate under dry weather conditions. (f) If a 99% two-sided condence interval for the average owrate under dry weather conditions is required with a length no larger than 50, how much additional sampling would you recommend? (g) Showhowtotest H0 : =440against HA : =440. (h) Showhowtotest H0 : 480against HA : <480.
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