摘要:

The simultaneous interval estimation for a given set of linear combinations of means whose estimates are jointly normally distributed is treated. In order to give the exact confidence intervals,t2M, the maximum of several quasi-independentt2-statistics, is introduced. Using the inclusion-exclusion formula, a procedure and tables are given for obtaining a good approximation to the exact upper percentage point oft2M. As illustrative examples, the procedure is applied to the interval estimations for parameters in the model of a randomized block design and for coefficients in a normal regression equation.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480755

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

In studies where validation data is not available, effective interviewers are identified on the basis of various measures of interviewing performance. Yet little is known about the validity of these measures. In the study reported, sample addresses were selected on a probability basis from the records of financial institutions and the holdings reported to the interviewer were compared with institution records for the day of the interview. The frequency with which an interviewer obtained the validated account(s) forms the basis for the criteria of interviewer effectiveness. This paper suggests that many frequently used measures of interviewer performance are poor indicators of interviewer effectiveness. Hypotheses for future testing are also presented on how the identification procedure might be improved.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480756

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

It is shown that the maximum likelihood estimate of a structural relationship line with uncorrelated errors is usually the same when both error variances are known as when only the ratio is known though exceptionally the slope of the line may be indeterminate. It is also shown how the equations given by Madansky [2] for the maximum likelihood estimates in the case when one error variance is known needs to be modified when, under certain circumstances, they are inconsistent.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480757

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

Much attention has been paid to bias of coefficients resulting from stepwise regressions. Looking at bias alone implies that stepwise estimates are inferior. However, using the criterion of relative mean square errors, it is shown for the two variable case that under certain circumstances, stepwise estimators are “better” than direct least squares estimators.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480758

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

This paper examines the relationship between the variability of profit rates and the size of firms. Two types of variability are investigated. The first is the intra-class variability of these ratios for two specific years, 1955 and 1958. The data indicate that this variability is inversely correlated with size. Profit ratios also vary over time and this type of variability is also examined. The results show that the time variability of the average rate of return for both small and large firms is less than that of medium sized firms. Finally, the paper shows that the results of these two separate investigations are consistent.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480759

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

In this paper we examine the effect of consumer financing on the static difference in durable goods purchase among various income groups. We also investigate the role of credit in the dynamic adjustment of consumers to the change in their incomes. The empirical results suggest that consumer credit has the effect of significantly altering the probability of purchase among various income groups though without affecting the absolute amount of consumption expenditure on durable goods. Our findings also indicate that consumers adjust their durable goods purchase upward in response to an increase in their incomes but resist an adjustment downward when their incomes fall. However, it is installment credit which makes the adjustment upward and resistance to downward adjustment possible.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480760

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

This note gives formulas for conditional means and covariances—formulas which are valid even when the joint distribution is singular. The method is algebraic; it applies to any joint distribution for which independence and zero correlation are equivalent.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480761

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

In the application of factorial experiments in industry, it is often necessary to apply the factors sequentially. For 2pexperiments in which (a) multiple testing on each experimental unit is possible and not degrading, (b) the effects of the factors are permanent, and (c) the low level of a factor is the absence of that factor, a design and an analysis are presented which allow the estimation and testing of order effects as well as the usual main and interaction effects of the factors.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480762

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

This note gives an alternate formula for computing the adjusted treatment sum of squares for Group Divisible Partially Balanced Incomplete Block Designs (GD-PBIB). The proposed formula is shown to be equal to one which is given in reference [1] and hence a cheek is provided in carrying out the computations.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480763

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor

摘要:

A Laguerre series expansion of a Poisson distribution is developed in terms of Laguerre polynomials and Gamma density function. An approximation to the first negative moment of a Poisson variate is obtained and compared numerically with its exact values.

ISSN:0162-1459    

DOI:10.1080/01621459.1964.10480764

出版商:Taylor & Francis Group    

年代:1964

数据来源: Taylor