How do I interpret information provided in “Summary Statistics”?
First, you should be aware that the statistics for slaves embarked, disembarked, and the percentage who died during the Middle Passage are calculated from imputed variables in the data set. Totals are somewhat less, and averages somewhat different, when based on data variables: 331 slaves embarked, 277 disembarked, and 10.9 percent mortality. The other four summary statistics (length of Middle Passage, percentage of children and males, and tonnage) are calculated from data variables.
