One econometric rule of thumb is that greater dispersion in observations of the independent variable improves estimates of regression coefficients and therefore produces better results, i.e., lower standard errors of the estimates. Nevertheless, students often seem to mistrust precisely the observations that contribute the most to this greater…

The purpose of these modules is to provide an introduction to the world of probability and statistics to accelerated mathematics students at the high school level. The materials are centered on the fictional town of Happy Shores, a coastal community which is at risk for hurricanes. Actuaries at an insurance company figure out the risks and…

It is not the kind of atmosphere most adults would find helpful if they needed to study and learn-high dropout rates, kids promoted without learning, schools short on money, profanity and disrespect, fighting, drug and alcohol abuse. Yet these are "very serious" problems in schools, according to surprisingly large numbers of the nation's black and…