Statistics Is an Art
Hi Eston --
I read your paper on "Weather Forecasts: Just How Reliable Are They?" and have a few questions. I am a retired engineer who enjoys data and would like to do a similar study for my home town. I want to look at the NWS and our local TV stations' 7 day forecasts (high, lows and precip.).
I was wondering if you have more details on the statistical analysis. I did take statistics for engineers in college in the 1960s, but have forgotten almost all I learned. I also did some statistics at work, but we had statisticians to do the hard stuff.
I enjoyed your blog "How I Learned to Love Statistics." I noticed you said "I gravitate to words, not numbers. In school I was the kid completely unfazed by William Faulkner and James Joyce." All our tacticians were even more nerds than us engineers and never entertained reading literature. When you said "I've overcome fear of statistics and acquired a real passion for it. And if I can learn to understand and apply statistics, so can you," it reminded me of understanding how to calculate the numbers, but not really knowing how or when to apply a certain test. I do remember my teacher saying that she wanted us to understand what the numbers meant and to hire a statistician to set up tests and provide guidance. I believed her.
Most of the analyses we did in the weather article are very straightforward in Minitab: you just go to the menu item, enter the appropriate columns of data into a dialog box, and press "OK."
Barry's note made me think about my personal relationship with statistics and data analysis, and how statistical software has facilitated that relationship. My studies have emphasized applied statistics, and while I've learned the theoretical and mathematical underpinnings of the analysis, that's not where my interests lie.That's why statistical software is such a boon. Again, it does the mathematical heavy lifting so we can focus on what the analysis actually means.
In other words, once I realized better tools were available to me, the art involved in statistics became much more apparent, and I became much more interested.
Barry's comment about learning the calculation without understanding when and why you'd use it really resonates with me. The fact is, unless you're analyzing data every day, you will forget what those formulas are and which tests do what. That's one major reason we added the Assistant to Minitab, to provide an interactive tool that guides people to and through the right type of statistical analysis, and then helps them interpret what the analysis means.
If you'd like to explore the art of statistics, and you don't already have it, you can try Minitab free. It's the complete, full package, and will work for 30 days. If you do try it, please let us know what you think. We love to get feedback from the people who use our software.