An approximation is proposed for the posterior mean and standard deviation of the ability parameter in an item response model. The procedure assumes that approximations to the posterior mean and ...

Is it really possible that half of all people who have ever been age 65 or older are still alive today? We explore the ...

Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...

U.S. employers and colleges are contending with more young people who are behind academically. Some are trying to make up ...

QUT researchers have developed a pioneering mathematical framework to help "pick winners" and maximize limited funding and ...

If you’ve ever shuffled a deck of playing cards, you’ve most likely created a unique deck. That is, you’re probably the only person who has ever arranged the cards in precisely that order. Although ...

High schoolers’ reading and math scores dropped to the lowest level in decades, along with declines in science scores from eighth graders, according to the National Assessment of Education Progress ...

A portrait of British politician Coulson Fellowes by the Venetian painter Rosalba Carriera (1673-1757) has sold at auction for £508,000, more than 20 times its estimate and a world record for an ...

This is a preview. Log in through your library . Abstract Huynh (1976) suggested a method of approximating the reliability coefficient of a mastery test, as a means of avoiding the extensive ...

Abstract: Frequency Modulated (FM) signals are usually characterized by two or more components having different waveforms and time-dependent frequencies. The estimation of the instantaneous frequency ...

Only a small percentage of high achievers in maths at primary school from disadvantaged backgrounds go on to fulfil their potential, a study has found. The study by University College London (UCL) ...