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Shi, W.; Kibria, B. M. Golam – International Journal of Mathematical Education in Science and Technology, 2007
A number of methods are available in the literature to measure confidence intervals. Here, confidence intervals for estimating the population mean of a skewed distribution are considered. This note proposes two alternative confidence intervals, namely, Median t and Mad t, which are simple adjustments to the Student's t confidence interval. In…
Descriptors: Program Effectiveness, Probability, Intervals, Simulation
Reyes, Melissa Lopez – International Journal of Mathematical Education in Science and Technology, 2003
A structure for learning the connections among standard deviations, z-scores, and normal distributions is presented. The components of this structure are classified into intuitive or previously learned conceptual knowledge, computational knowledge, and formalized conceptual knowledge. (Contains 1 figure.)
Descriptors: Concept Formation, Mathematical Concepts, Mathematics Education, Comprehension

Callender, J. T.; Jackson, R. – International Journal of Mathematical Education in Science and Technology, 1998
Analyzes the mathematics of rotational and translational motion and how one can influence the other in the context of cams and cranks. Describes how the individual components can be brought together to simulate a four-stroke engine and how the engine animates again using the same simple macro. (Author/ASK)
Descriptors: Computer Simulation, Computer Uses in Education, Educational Technology, Mathematical Models