Afhalen na 1 uur in een winkel met voorraad
Gratis thuislevering in België vanaf € 30
Ruim aanbod met 7 miljoen producten

Afhalen na 1 uur in een winkel met voorraad
Gratis thuislevering in België vanaf € 30
Ruim aanbod met 7 miljoen producten

Winkels

Verlanglijstje

Winkels

Verlanglijstje

Zoeken

Volg ons op

140 winkels

Wist je dat er in Vlaanderen voor iedereen een Standaard Boekhandel is binnen een straal van 7 km?

Vind hier een winkel

€ 151,95

+ 303 punten

Levertermijn 1 à 4 weken

Eenvoudig bestellen

Veilig betalen

Gratis thuislevering vanaf € 30 (via bpost)

Gratis levering in je Standaard Boekhandel

Omschrijving

This book shows how to conduct statistical power analysis when the underlying research data are unreliable and explores how sample design effects, measurement error, and equating error impact power analysis. As such, it covers unreliability in test scores and in the measurement scale, and incorporates both the sources of sampling error, such as design effects in survey sampling, and measurement error, such as unreliability and equating error in psychometrics, in power calculations. Five widely used statistics are treated, including the mean for one group, mean difference for two independent groups, mean difference for two dependent groups, proportion, and correlation. Each chapter develops procedures for a simple and complex random sample of true scores or units, and a complex random sample of observed scores or units without and with equating error. Analogously to design effects due to complex random sampling, the reader is introduced to indices of measurement effects, which reflect the impact of measurement error and equating error on the standard error of the statistic. The book includes numerous worked out examples and is aimed at practitioners, researchers and students in psychometrics and other social and behavioral sciences.