Winter, it does represent Alaska, within a certain margin of error that is determined by the sample size.  In this particular case, with a 750 sample, you have an MOE of +/-3.6% at 95% confidence.  It's a common misconception that "there's 500,000 adults in Alaska and you only surveyed 750??", thinking that this can't possibly yield accurate results.  But I'm sorry, it does.  Try this at home:  get a coin and flip it 750 times, if you're not within 46.4% and 53.6% for the heads or tails, then you just got the 1 in 20 that falls outside the margin.