Researchers extracted a subset of total crashes that are expected to be influenced by the widths of right lane and right shoulder (such as single vehicle crashes, opposite direction crashes, etc.). In...

Researchers extracted a subset of total crashes that are expected to be influenced by the widths of right lane and right shoulder (such as single vehicle crashes, opposite direction crashes, etc.). In the data set “Crashes_rural 2ln highways,” the column named “Related crashes for 3 years” contains such crashes. Answer problems 2a to 2g using “Related crashes for 3 years” instead of “Total crashes for 3 years.”