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<br />1-02 <br /> <br />of siJll;p1e generalizat10D. procedures for use where '!;hese are adequate <br />and. advantageous are gi_n. <br /> <br />, <br /> <br />(4) A brier list or key questions and siJll;p1e problems <br />suitable for use in training cJ.a8ses. More detailed training docu- <br />ments have been prepared in cOlUlection with training courses given <br />under Civil Works Investigation Project CW-151 in the Sacramento <br />District of the Corps of Engineers. <br /> <br />(5) Discussions pertaining to certain aspects of stat is- <br />tical analyses associated with-hydrologic engineering that deserve <br />special emphasis. <br /> <br />,2.. For those who are interested only in frequency analyses <br />of nood diSCharges, sectLons3 e.nd 4 and exhibits 2 to 4 contain. the <br />essential guide IIl&terial. For those interested only in correlation <br />analyses, section 9 contains the essential. IIl&terial. The detailed <br />procedure forcClllputing the frequencies of flood peaks and volumes <br />is given step by step on exhibit 18. <br /> <br />1-03. <br /> <br />REFERENCES <br /> <br />\ . <br /> <br />There are a great many textbooks on _ statistics, probabil1 ty , <br />and correlation, and a multitude of technical papers on the statis- <br />tical aspects of hydrologic engineering. A f<!TtT references con- <br />sidered particularly applicable and useful for the purpose of <br />supplementing IIl&terial contained herein are given at the end of <br />the text. <br /> <br />1-04. <br /> <br />ORGANIZATION OF THIS PAPER <br /> <br />The technical presentation in this paper begins with a brief <br />discussion of statistical concepts and definitions contained in <br />section 2. Graphical methods of frequency analyses are covered in <br />section 3, and numerical or analytical procedures are contained in <br />section 4. A reccmmended procedl.lre for adjusting frequency e6ti-. <br />IIl&tes based on short records, using da"a at long record stations, <br />is contained in secti<:n 5. Extension of the methods discuss~d in <br />section 4 for use in estimating frequencies of flood volumes is <br />contained in section 6. Recollllllended:means for coordinating fre- <br />quency estimates within a region for the purposes of increasing <br />the reliability of estilll&tes and for deriving estimates for <br />ungaged areas are contained in section 7. A brief description of <br />the application of frequency procedures to bydro1ogic factors <br />other than runof'f is- contained in section 8. Section 9 contains <br />a brief exposition of correlation methods generally in use. These <br /> <br />- 2 - <br />