Logarithmic Regression: Different correlation from 3 different calculators

06092015, 10:00 PM
Post: #6




RE: Logarithmic Regression: Different correlation from 3 different calculators
(06092015 09:37 PM)groundbeef Wrote: Just another data point for you  my Casio fx9750GII gives 0.96837274. Yeah, I've checked and rechecked the data several times to make sure everything is entered properly. If you want to get a few more digits out of it, this works on my fx9860g Slim: 1. Evaluate r (from the Catalog) in Run mode. 2. Subtract the most significant digits from And and multiply by powers of 10 as needed. With that method, the Casio gives me 0.968372745386438, even more digits than the TI or HP. And in this particular case, you're right, I'm still getting more than enough accurate digits to draw a reasonable conclusion (i.e. that log regression isn't appropriate for this data). My fear is that the way I'm calculating correlation could have even worse accuracy with other datasets. If it were off in the hundredths place, that would be a bigger problem. 

« Next Oldest  Next Newest »

User(s) browsing this thread: 1 Guest(s)