Interval-Valued and Fuzzy-Valued Random Variables: From Computing Sample Variances to Computing Sample Covariances

Beck, J. B., Kreinovich, V., & Wu, B. (2004). Interval-Valued and Fuzzy-Valued Random Variables: From Computing Sample Variances to Computing Sample Covariances. In Soft Methodology and Random Information Systems (pp. 85–92). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-44465-7_9