probmods/probmods2

Questions concerning 'Prelude: Thinking About Assembly Lines'

CMoebus opened this issue · 3 comments

CMoebus commented

Hi,
I have three questions.

  • First, what does it mean to be a 'bad' widget? Is it a widget above or below a threshold ?
  • Second, what is picked from the assembly line ? The good or the bad widget ? Or vice versa, what is left on the assembly line? The bad or the good widget ?
  • Third, what is the logic of the array three ascending thresholds in 'condition(_.isEqual([.6, .7, .8], goodWidgetSeq)'. Wouldn't it be better to ask whether all elements in goodWidgetSeq would be greater than the sampled threshold ?
    Best, Claus
null-a commented

Since I looked at this yesterday, I'll share my understanding:

what does it mean to be a 'bad' widget?

A widget is represented by a real number. If this real number is greater than the threshold the widget is good, otherwise it's bad.

what is picked from the assembly line

The factory (makeWidgetSeq) rejects bad widgets, only good widgets are included in the factory's output (the returned array).

what is the logic of the array three ascending thresholds in 'condition(_.isEqual([.6, .7, .8], goodWidgetSeq)'

These represent 3 (good) widgets that have been observed coming out of the factory. From this (and the prior) we want to infer the threshold.

CMoebus commented
hawkrobe commented

I'm going to close this for now -- feel free to open a new issue if you have additional questions or comments!