Journal of the American Statistical Association

最新文章

• SEQUENTIAL METHOD OF SAMPLING FOR DECIDING BETWEEN 2 COURSES OF ACTION AI翻译
  作者：WALD, A
  摘要：The sequential plan provides a rule for continuing to accumulate cases until the total evidence is strong enough to decide between 2 possible courses of action. Since a decision is made on the basis of a sample, rather than the whole population, there will be some chance that a wrong choice will be made. The investigator is at liberty to decide what risks of wrong decisions he can afford. These 2 risks correspond to 2 chosen values of a parameter, such as an average value or the % of cases hav...
• THE USE OF DISCRIMINANT FUNCTIONS IN COMPARING JUDGES SCORES CONCERNING POTATOES AI翻译
  作者：BATEN, WD
  摘要：The discriminant function simply takes a linear combination of estimates on such characteristics as color, mealiness, texture and flavor. Each estimate is the average of several judges'' scores, while the corresponding coeffs. are detd. by the discriminative value of the characteristics. An analysis of variance can be used to determine whether the average combination for one condition is significantly better than that for the other. The method also ranks the characteristics in order of importa...
• THE SQUARE ROOT METHOD AND ITS USE IN CORRELATION AND REGRESSION AI翻译
  作者：DWYER, PS
  摘要：The square root method accomplishes the same end results for multiple correlation as does the Doolittle method. It makes full use of the modern calculating machine, so that a minimum of numbers must be written down. The typical operation is a sum or difference of products, followed by a square root or a division. The method is readily learned, is compact and reduces the chance for errors. The non-mathematical reader will not have much difficulty with the notations if he will let the subscripts...
• A CHART OF THE X-2 AND T-DISTRIBUTIONS AI翻译
  作者：CROW, JF
  摘要：A convenient chart on these distributions using a normal curve scale is described and shown. It is obtainable free from the author.
• TEST OF THE SIGNIFICANCE OF THE DIFFERENCES OF PERCENTS OF EMERGENCE OF SEEDLINGS IN MULTIPLE FIELD TRIALS AI翻译
  作者：BAKER, GA
  摘要：In comparing differences in % of emergence of seedlings under 2 different treatments at widely separated stations a common difficulty is that the variability differs according to whether there is little or much infective agent present. A method of circumventing this difficulty is presented whereby appropriate wts. are obtained so that standard significance tests may be used.
• A simplified formula for mean difference AI翻译
  作者：Cheng, TT
• Use of the survival rate method in measuring net migration AI翻译
  作者：Hamilton, CH; Henderson, FM
  作者单位：North Carolina State University
• A new probability function and its properties AI翻译
  作者：Cheng, TT
• On samples from finite populations AI翻译
  作者：Cornfield, J
  摘要：Associated with each value Xi in the population is a number ai, which is unity if that Xi is in a given sample, or zero otherwise; These at''s are useful in deriving finite sampling results such as that for the variance of the sample mean.
• Application of the logistic function to bio-assay AI翻译
  作者：Berkson, J
  作者单位：Mayo Clinic
  摘要：The author discusses a technique for fitting the logistic growth-function to data on mortality rates at various concs. of a drug. By a simple transformation (which is facilitated by a scale nomograph presented in the article) the function becomes linear. The usual least-squares soln. is then made and theoretical mortalities readily found. A numerical illustration is given. Using chi-square the results appear somewhat better than those obtained by use of the integral of the normal curve in 7 il...