[trharri2@ncsu.edu]

Previously, when using the sampler, I believe a new “experiment” would be created each time the start button was pressed (i.e. a new line in the experiments section of the table would be created). Now, it seems that all of the data from each press of the start button gets thrown into a single experiment.

For example, in the Duck Pond example document, the instructions in Pages 2 and 3 would create multiple experiments and create a sampling distribution in the bottom-left graph. Now, the sampling distribution no longer gets created since all the data gets put into a single experiment.

Is this the intended action? Is there a way to tell CODAP to put the new data from the sampler into a new experiment rather than combining it with previous data?

[Bill Finzer]

Hello,

You’re right. Recent changes to the Sampler made it so the Duck Pond no longer produces the results desired. (The changes were deliberate.)

Here’s a workaround for now: After each time you press Start, edit the value of experiment to something other than “1;” for example “a.” Then when you press Start the new experiment will, once again, get the value of 1, which you could then edit to something else, perhaps “b.”

I’m going to check with the designers of the Duck Pond example document to see if they have a better idea.

Thanks very much for pointing this out!

Bill

[wgarymartin@gmail.com]

Have you come up with a better way of defining the start of a new experiment? I am doing a simulation where I want to compare experiments.

[jwall@nwmissouri.edu]

I’m not able to start a new experiment even with the recommendation above to change the experiment to something other than 1. I’m watching a video where it’s working, but when I try it on my own, each time I press start, the new samples all go within the same experiment.

[Bill Finzer]

Hello,

I just tried it myself and was able to start a new experiment in several different ways starting from the default setup:

• I pressed Start to get my first experiment.
• I changed from Mixer to Spinner and pressed Start to get my second experiment.
• I added a wedge to the spinner and pressed Start to get my third experiment.

But perhaps you have something else in mind?

Bill

[jkang]

Hi,

What you suggest does work (kind of), but to demonstrate a sampling distribution, you’d have to come up with too many different click combinations to make this effective in the classroom.

Also, I’m not sure what you meant by “add a wedge”. If you add a wedge, it changes the original distribution. So I assume you’d also delete that wedge before hitting “start”? But then that actually reverts back and adds the extra 50 samples to experiment #2 and doesn’t trigger the third experiment.

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