vi PREFACE 



met in actual practice. These populations, if properly employed, will 

 enable the student to understand the more common sampling distri- 

 butions rather well despite a lack of familiarity with mathematical 

 statistics. Some of the problems in this book assume that such popu- 

 lations are available to the students. 



It is desirable to have calculating machines available so that the 

 students can learn what operations can be performed on them and can 

 solve some of their problems more efficiently. However, I do feel 

 that the acquisition of routine computational skills is not worthy of 

 much college credit; hence, whenever there are heavy computations in 

 a problem in this book, the necessary computations are usually given 

 with the problem. For example, 2(X) and 2(X 2 ) are given for most 

 problems with even a moderate amount of computation and asking 

 for the mean and the standard deviation. 



It has been my experience that it takes most of the equivalent of a 

 three-semester-hour course to equip the student with the ideas and 

 methods he needs before he can solve even the most elementary sam- 

 pling problems in any particular field. For that reason we offer at 

 Kansas State College a two-hour course in which the rest of the work 

 on sampling contained herein can be given, and some applications to 

 the students' fields of interest can be considered. 



It is a pleasure to acknowledge the assistance given me by my col- 

 league J. I. Northam, who pointed out errors in previous lithoprinted 

 versions and made suggestions regarding the way the material should 

 be presented. This book also has derived considerable benefit from 

 the reviews made available to me during the last revisions of the 

 manuscript. Obviously, the responsibility for all remaining short- 

 comings of the book is solely mine. 



H. C. Fryer 



Kansas State College 



Manhattan, Kansas 



December, 1953 



