Oil and Gas on Indian Reservations: Statistical Methods Help to Establish Value for Royalty Purposes

Mary S. Fowler

Worcester State College

Joseph B. Kadane

Carnegie Mellon University
Journal of Statistics Education Volume 14, Number 3 (2006), www.amstat.org/publications/jse/v14n3/kadane.html

Abstract

Part of the history of oil and gas development on Indian reservations concerns potential underpayment of royalties due to under-valuation of production by oil companies. This paper discusses a model used by the Shoshone and Arapaho tribes in a lawsuit against the Federal government, claiming the Government failed to collect adequate royalties. Portions of the case have been settled out of court with compensation paid to the Tribes. Other portions remain pending. This material can be used as a real example in a calculus-based probability and statistics course.

Keywords: Expectation; Law; Location-scale family.

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Attitudes Toward Statistics and Their Relationship with Short- and Long-Term Exam Results

Stijn Vanhoof

Ana Elisa Castro Sotos

Patrick Onghena Lieven Verschaffel

Wim Van Dooren

Wim Van den Noortgate

Katholieke Universiteit Leuven
Journal of Statistics Education Volume 14, Number 3 (2006), www.amstat.org/publications/jse/v14n3/vanhoof.html

Abstract
This study uses the Attitudes Toward Statistics (ATS) scale (Wise 1985) to investigate the attitudes toward statistics and the relationship of those attitudes with short- and long-term statistics exam results for university students taking statistics courses in a five year Educational Sciences curriculum. Compared to the findings from previous studies, the results indicate that the sample of undergraduate students have relatively negative attitudes toward the use of statistics in their field of study but relatively positive attitudes toward the course of statistics in which they are enrolled. Similar to other studies, we find a relationship between the attitudes toward the course and the results on the first year statistics exam. Additionally, we investigate the relationship between the attitudes and the long-term exam results. A positive relationship is found between students’ attitudes toward the use of statistics in their field of study and the dissertation grade. This relationship does not differ systematically from the one between the first year statistics exam results and the dissertation grade in the fifth year. Thus, the affective and cognitive measures at the beginning of the curriculum are equally predictive for long-term exam results. Finally, this study reveals that the relationship between attitudes toward statistics and exam results is content-specific: We do not find a relationship between attitudes and general exam results, only between attitudes and results on statistics exams.

Keywords: Assessment; Attitudes Toward Statistics scale.

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Heterosis for Seed Yield and Its Components In Rapeseed

Muhammad Akbar, Tahira and Makhdoom Hussain


Abstract
Heterosis and heterobeltiosis were estimated for different quantitative characters in 5x5 half diallel F1 crosses involving five Brassica genotypes at Oilseeds Research Institute, AARI, Faisalabad during 2003-04. The results showed significant differences between F1’s and their parents for all traits studied except 1000-seed weight. KS75 and RBN96040 proved to be potential parents for most of the traits with highly significant maximum heterosis and heterobeltiosis for seed yield and siliquae per plant. These were followed by crosses KS75/RBN96038, RBN96040/RBN96038 and RBN96040/3/RAINBOW//DGL/ SHIRALEE for seed yield and some other yield components. So these cross combinations must be given due consideration while constituting commercial hybrids and finding out transgressive segregants in late segregating generations.

Keywords: Brassica napus; crossbreeding; hybrid vigour; agronomic characters; Pakistan.

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Studies on Planting Patterns of Maize (ZEA MAYS L.) Facilitating Legumes Intercropping

Asmat Ullah, M. Ashraf Bhatti, Zulfiqar Ali Gurmani and M. Imran

Abstract
Effect of planting patterns and intercropping of legumes in maize was studied at Agronomic Research Area, University of Agriculture, Faisalabad on a sandy clay loam soil during autumn 2004. The planting pattern of maize comprised 60 cm spaced single rows, 90 cm spaced double row strips, 90 cm spaced single rows and 135 cm spaced double row strips, while intercrops were mungbean and soybean. The results revealed that soybean + maize in 90 cm spaced double row strips gave maximum maize grain yield (6.71 t/ha). Maximum land equivalent ratio (1.62) was also recorded in 90 cm spaced double row strips, intercropped with soybean. Similarly all intercropping systems gave substantially higher net income over mono-cropping with higher net income (Rs. 56043.50/ha) in case of maize + soybean followed by sole crop of maize (Rs. 52653.50 t/ha).

Keywords: Zea mays; soybeans; mung beans; spacing; intercropping; Pakistan.

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