Not Statistically Significant

   You've probably seen those words in relation to a study at sometime or another. Did you ever wonder what they mean?
     Significant to most of us means important.
     Something to be "not statistically significant" means the difference between the observed value and the expected value is small enough that it doesn't raise any eyebrows for the testers.
     HOWEVER
     Just because a difference may not be statistically significant doesn't mean it wouldn't be important to the rest of us.
    For example: a recently released study showed a final average weight of 100.42 kg for group A and 101.75 kg for group B. And those numbers were not statistically significant.
    But these numbers also have some real world monetary values. 
100.42 kg equals 221 pounds 6 ounces. 
101.75 kg equals 224 pounds 5 ounces.
If both groups contain 72 items:  
group A will contain 15939 pounds
group B will contain 16374.5 pounds
each pound is currently valued at 75.702 cents
Group A would be worth $12066.14
Group B would be worth $12395.82
A difference of $329.68.
     That might not be "statistically significant" but it is a monetarily significant. Like a weeks wages significant if you were on minimum wage. Or a car payment for a lot of people. You could probably buy groceries for at least a week with that amount of money. I KNOW I could.