Even small probabilities of infection for individuals compound to large probabilities for a large number of people. Carnival needs low risk passengers and screening to be near 100% effective to reduce ...

Here is a depressing fact: over the coming decades, sea-level rise will continue to threaten ecosystems, communities and ...

Robbins (1968) considered the problem of estimating the total probability of the unobserved outcomes of an experiment. In this paper we suggest an estimator, based on n trials, and show that under ...

The problem of estimating the variance of the ratio estimator in sampling with probability proportional to aggregate size is investigated. The form of nonnegative unbiased variance estimators is found ...

Women who are diagnosed with breast cancer at a young age, or at an advanced stage at any age, are more likely to die from the disease than from all other causes of death combined, according to a new ...