Abstract
Two survey items asking for estimates of probability or frequency of conditional events,
(AIR) and (BIA), were completed by 2719 school students in grades 5 to 11. Cross-sectional
and longitudinal analyses revealed improvement with grade in expressing probability
numerically and in distinguishing conditional events. Conditional events were better
distinguished for the frequency item than the probability item. Comparisons with responses
to other probability items indicated understanding of conditional probability was related to
development of basic chance measurement.
Jane M. Watson & .Jonathan B. Moritz
LONGITUDINAL UNDERSTANDING OF CONDITIONAL PROBABILITY BY SCHOOL STUDENTS