Re: [Phys-L] spinner data -- experimentation 101

[bernard cleyet <bernard@cleyet.org>]

> On 2017/Sep/19, at 03:53, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:
>
>
> However, you can't trust the fitted parameters if you
> don't trust the underlying data.
>
> Because of the jumps, I don't trust this fit farther than
> I could throw it.  And it's bad manners to throw a fit.
>
> This shows why experimentation is iterative:  Do a preliminary
> experiment, find out what the problems are, then try again.
> _______________________________________________


I suspect the app was bumped, or an interfering noise.  

This (JD’s) calls in to question some of my experiments in which there was interruption of the data.  So I isolated the sections, which I then analysed separately. 

AGAIN;  I suppose if more than one of us uses a time series OK.  



bc is off to Orchard Supply where they have spinners at the check out counter (pay point in England --  like click bait).  

p.s.  I think Mumfords MicroSet has a turns counter app.  uses reflection from a reflection tape stuce on the shaft???