Correct answer
No; the populations differ and a positive result alone does not establish the cause of the crash.
No. The populations and measures differ: toxicology testing of deceased drivers does not count all fatal crashes or establish by itself which substance caused each crash. Identify the year, sample, denominator and included substances. An old percentage without that context cannot be presented as a universal current figure for crashes caused by drugs. Avoid alcohol and drugs when driving and follow medicine precautions.
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No; the populations differ and a positive result alone does not establish the cause of the crash.
Yes; any positive-test percentage equals crashes caused by drugs.
Yes; the year and tested substances never matter.
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