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| 02611cam 2200421zi 4500 |
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| 001 | 9.870432 |
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| 003 | CaOODSP |
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| 005 | 20221107163120 |
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| 006 | m o d f |
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| 007 | cr ||||||||||| |
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| 008 | 190322e198708##oncbd #ob f000 0 eng d |
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| 040 | |aCaOODSP|beng|erda|cCaOODSP |
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| 041 | |aeng|bfre |
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| 043 | |an-cn-on |
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| 086 | 1 |aEn13-5/87-141E-PDF |
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| 100 | 1 |aEl-Shaarawi, A. H., |eauthor. |
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| 245 | 10|aInferences about the mean from censored water quality data / |cby A.H. El-Shaarawi. |
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| 264 | 1|aBurlington, Ontario : |bNational Water Research Institute, Canada Centre for Inland Waters, |cAugust 1987. |
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| 300 | |a1 online resource (13 pages, 7 unnumbered pages) : |bmaps, graphs. |
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| 336 | |atext|btxt|2rdacontent |
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| 337 | |acomputer|bc|2rdamedia |
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| 338 | |aonline resource|bcr|2rdacarrier |
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| 490 | 1 |aNWRI contribution ; |v87-141 |
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| 500 | |a"RRB-87-38." |
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| 500 | |aTitle from cover. |
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| 500 | |aDigitized edition from print [produced by Environment and Climate Change Canada]. |
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| 504 | |aIncludes bibliographical references. |
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| 520 | 3 |a"Several methods which are commonly used for making inferences about the levels of many metals and organic contaminants in ambient waters from type I censored data are critically evaluated and their applications are illustrated using the concentrations of PCB in water samples from the Niagara River. Difficulties encountered in the application of all the methods, except the method of maximum likelihood, include the occurrence of inadmissible estimates for the censored values and the unavailability of the standard errors for these estimates. Under the assumption that the distribution of the data is lognormal, the log regression method is modified to produce admissible estimates of the censored values and the properties of the maximum likelihood estimates for the lognormal mean are derived. Furthermore, an approximate confidence interval for the lognormal mean is given and its use for estimating the load to and from the Niagara River is illustrated"--Abstract. |
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| 546 | |aIncludes a management perspective and abstract in English and French. |
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| 692 | 07|2gccst|aWater pollution |
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| 692 | 07|2gccst|aWater quality |
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| 692 | 07|2gccst|aMethodology |
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| 710 | 1 |aCanada. |bEnvironment Canada. |
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| 710 | 2 |aCanada Centre for Inland Waters. |
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| 710 | 2 |aNational Water Research Institute (Canada) |
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| 830 | #0|aNWRI contribution ;|v87-141.|w(CaOODSP)9.844121 |
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| 856 | 40|qPDF|s1.12 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-87-141-eng.pdf |
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