His projects have made available to oceanographers accurate, long-period records for large areas where previously very little observational data were available.

Both questionnaire data and observational data, such as eye contact, positive vocalizations, and interaction quality, were used for evaluation purposes.

There are a number of strategies for identifying and coding empirical observational data.

The condition of homoscedasticity can fail with either experimental or observational data.

As such, the test statistic follows a distribution determined by the function used to define that test statistic and the distribution of the observational data.