Comparative experiment evaluates travel time differences between alternative commuter routes, highlighting the necessity of adequate statistical power in study design.
Every workday I join scores of suburbanites on a commute into Minneapolis from our lovely town of Stillwater nestled in the scenic Saint Croix Valley on the eastern border of Minnesota.However, a big decision looms ahead for all of us at a juncture a dozen miles down the road west-whether to go:❖Directly into downtown on Minnesota Highway 36 (7.6 miles with 3 stoplights), or ❖Via a bypass on Interstate 694 (8.5 miles of freeway).For no particular reason other than the inertia of staying on 36, I'd been passing on the 694 bypass.But I began to wonder what I might be missing for savings on commuting time.Therefore I set up a simple comparative experiment to generate conclusive statistical evidence on which route to take in to work. From the Factorial tab of Design-Expert ®Stat-Teaser • News from Stat-Ease, Inc., www.statease.
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Mark J. Anderson (2026) studied this question.
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