Yeah it seems likely that some other factor may be involved, other than the legal status of e-cigarettes ( which apparently hasn't changed since 2009 ). The article stated that this was the first year on year increase in seven years.
Blaming e-cig laws for the increase to 17.1 % from 16.4 % ( 2014 to 2015 ), isn't any different than crediting e-cig laws for the decrease in smoking rates from 18 % to 16.4 % ( 2013 to 2014 ).
I hope you Didn't miss the meaning of my Post?
And that is that if someone reads a Statistic which is supposed to be Indicative of a Population, one should ask what is the Margin of Error of the Statistic?
Because it is very Easy for me to Manipulate Numerical Percentages by Relaxing the Margins of Error of a Percentage to suit my Goals.
My Gawd, with all the Slanted things we have seen in the Last 2 Years, I would Hope that when a person is given a "Result" that they then ask what is the Margin of Error or Confidence Interval/Power of the Test or Sample Size or Sample Method Selection or etc, of how the Result was Generated.
Statistics is a Beautiful Tool to Influence Public Opinion with out Actually Lying. Because groups can present All Kinds of Results that play well into what they want someone to Believe. And can Massage the Numbers by not telling you how Accurate a Result is relative to the Data that was Evaluated. And or by Selecting Data that you know will lean towards a Desired Outcome.
People need to Stop Blindly Believing Statistical Results. And Stop being lead around by the Nose by those who may/can use Statistics for what they are Not Designed to do.