InterA.2Balls History

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September 10, 2008, at 01:38 AM by LFS -
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[c]

April 30, 2008, at 07:00 AM by LFS -
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April 26, 2008, at 03:20 AM by LFS -
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Then, double-click on 2balls.html.
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Then, double-click on 2balls.html. How do I do all this?
April 26, 2008, at 01:43 AM by LFS -
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April 26, 2008, at 01:26 AM by LFS -
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Then, double-click on 2balls.html to open activity.
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Then, double-click on 2balls.html.
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April 26, 2008, at 01:24 AM by LFS -
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To use offline, download and unzip 2balls_v2.zip.

to:

To use offline, download and unzip 2balls_v2.zip.

Then, double-click on 2balls.html to open activity.
April 26, 2008, at 01:18 AM by LFS -
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"Mutually exclusive" meaning both events cannot happen at same time and "complete" meaning no other event can occur.

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"Mutually exclusive" means both events cannot happen at same time and "complete" means no other event can occur.

April 24, 2008, at 11:03 PM by LFS -
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[c valign=middle]
[table border=1 cellpadding=5]
[row]
[c]Activity Notes
[row]
[]
We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

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We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

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[tableend]

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April 24, 2008, at 10:44 PM by LFS -
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April 24, 2008, at 10:43 PM by LFS -
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April 24, 2008, at 10:42 PM by LFS -
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"Mutually exclusive" meaning both events cannot happen at same time and "complete" meaning no other event can occur.
to:
April 24, 2008, at 10:37 PM by LFS -
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  We call this event: Green first.

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 We call this event: Green first.

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  We call this event: Red first.

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 We call this event: Red first.

April 24, 2008, at 10:36 PM by LFS -
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[]Attach:cat1try.jpg Δ
[ valign=middle] below to see the whole action ***

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[]Attach:cat1try.jpg Δ  Attach:down_cat.gif Δ
[ valign=middle] to see the whole action ***

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   We call this event: Green first.

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  We call this event: Green first.

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   We call this event: Red first.

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  We call this event: Red first.

April 24, 2008, at 09:52 PM by LFS -
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To use offline, download and unzip 2balls_v2.zip.

Scratch file designed by Linda Fahlberg-Stojanovska.

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April 20, 2008, at 05:12 AM by LFS -
April 20, 2008, at 04:28 AM by LFS -
April 20, 2008, at 04:25 AM by LFS -
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We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

to:

We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

April 20, 2008, at 04:05 AM by LFS -
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  • To use offline, download and unzip 2 Ball-1 Box Drop.
to:
  • To use offline, download and unzip 2 Balls Drop.
April 20, 2008, at 04:02 AM by LFS -
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  • Download 2 Ball Drop Scratch file designed by Linda Fahlberg-Stojanovska
  • To use offline, download and install freeware Scratch. See Scratch-MIT for more information.
to:
  • To use offline, download and unzip 2 Ball-1 Box Drop.
  • Scratch file designed by Linda Fahlberg-Stojanovska.
  • To change Scratch file, download and install freeware Scratch. See Scratch-MIT for more information.
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April 20, 2008, at 03:59 AM by LFS -
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[ valign=middle] to see the whole action ***

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[ valign=middle] below to see the whole action ***

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Do the experiment 200-1000 times.

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Do the experiment 200-1000 times.

April 20, 2008, at 03:59 AM by LFS -
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   We call this event: Green first.

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   We call this event: Green first.

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   We call this event: Red first.

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   We call this event: Red first.

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Play this applet to find out the probability of each of these 2 events.
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Questions to think about:

  • Theoretically, how often should the green ball be the first into the box?
  • Theoretically, what is the probability that the red ball will drop first?
  • How many experiments did it take you to get this theoretical probability?
  • What other real life situations give this kind of probability?
to:

Do the experiment 200-1000 times.

  • What is the percent of green first?
  • What is the percent of red first?
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Now for some dreaded theory ...

  • Theoretically, how often should the green ball drop first into the box?
  • Theoretically, what is the probability that the red ball will drop first?
  • Does this agree with your experimental results?
  • What other real life situations give this kind of probability?
April 20, 2008, at 03:55 AM by LFS -
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  • Online Activity: Mix and Drop 2 Equally Weighted Balls into a Vertical Box
   How often will the green colored ball drop first? How often the red ball?
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We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

to:

We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

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April 20, 2008, at 12:25 AM by LFS -
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April 20, 2008, at 12:24 AM by LFS -
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April 20, 2008, at 12:24 AM by LFS -
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  • Download 4 Ball-2 Box Drop Scratch file designed by Linda Fahlberg-Stojanovska
to:
  • Download 2 Ball Drop Scratch file designed by Linda Fahlberg-Stojanovska
April 20, 2008, at 12:20 AM by LFS -
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   How often will the green colored ball drop first?
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   How often will the green colored ball drop first? How often the red ball?
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April 20, 2008, at 12:19 AM by LFS -
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[]

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[c]

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[c valign=middle] to see the whole action ***

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[ valign=middle] to see the whole action ***

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  • Theoretically, what is the probability that the red ball will drop first into the box?
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  • Theoretically, what is the probability that the red ball will drop first?
April 20, 2008, at 12:15 AM by LFS -
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[ valign=middle] to see the action ***

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[c valign=middle] to see the whole action ***

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(a) The green ball will drop first into the box.

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(a) The green ball will drop first.

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(b) The red ball will drop first into the box.

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(b) The red ball will drop first.

April 19, 2008, at 11:42 AM by LFS -
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[table border=0]

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[]

[table border=0]
[row]

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[ valign=middle] below ***

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[ valign=middle] to see the action ***

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[c]Activity Notes

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[c]Activity Notes

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[table border=0]

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The following two events are mutually exclusive and complete.

[table border=0 cellpadding=5]

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[ valign=middle]*** Click on 
[]Attach:cat1try.jpg Δ
[ valign=middle] at left ***
[tableend]

The following two events are mutually exclusive and complete.

[table border=0 cellpadding=5]
[row]

April 19, 2008, at 11:31 AM by LFS -
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Click on the cats!

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[c]Applet Notes

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[c]Activity Notes

April 19, 2008, at 11:28 AM by LFS -
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  • Theoretically - how often should the green ball be the first into the box?
  • What is the probability that the red ball will drop first into the box?
  • How many experimental trials did it to get this theoretical probability?
to:
  • Theoretically, how often should the green ball be the first into the box?
  • Theoretically, what is the probability that the red ball will drop first into the box?
  • How many experiments did it take you to get this theoretical probability?
April 19, 2008, at 11:27 AM by LFS -
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[ valign=middle] below! ***

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[ valign=middle] below ***

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[ valign=middle] at left! ***

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[ valign=middle] at left ***

April 19, 2008, at 11:27 AM by LFS -
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[ valign=middle] to see the idea. ***

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[ valign=middle] below! ***

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*** Click on "Cat 1 Try" to see the idea. ***

The following two events are mutually exclusive and complete.

[table border=0 cellpadding=5]

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[table border=0]

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[ valign=middle]*** Click on 
[]Attach:cat1try.jpg Δ
[ valign=middle] at left! ***
[tableend]

The following two events are mutually exclusive and complete.

[table border=0 cellpadding=5]
[row]

April 19, 2008, at 11:26 AM by LFS -
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*** Click on "Cat 1 Try" to see the idea. ***

 

[table border=1 cellpadding=5 width=100%]

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April 19, 2008, at 11:19 AM by LFS -
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  • Online Activity: Mix and Drop 2 Equally Weighted Balls

 

[table border=1 cellpadding=5 width=98]

to:
  • Online Activity: Mix and Drop 2 Equally Weighted Balls into a Vertical Box
   How often will the green colored ball drop first?
*** Click on "Cat 1 Try" to see the idea. ***

 

[table border=1 cellpadding=5 width=100%]

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[c]

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[c valign=middle]

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<applet id='ProjectApplet' style='display:block' code='ScratchApplet' codebase='http://mathcasts.org/mtwiki/uploads/Activity' archive='ScratchApplet.jar' height='387' width='482'><param name='project' value='2balls.sb'></applet>

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<applet id='ProjectApplet' style='display:block' code='ScratchApplet' codebase='http://mathcasts.org/mtwiki/uploads/Activity' archive='ScratchApplet.jar' height='387' width='482'><param name='project' value='2balls_v2.sb'></applet>

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[tableend]

 

  • 2 Ball Drop for Scratch-MIT designed by Linda Fahlberg-Stojanovska
to:

[c valign=middle]
[table border=1 cellpadding=5]
[row]
[c]Applet Notes
[row]
[]
We have 2 balls - 1 Red and 1 Green. We mix and drop them into a vertical box. What color ball drops first?

*** Click on "Cat 1 Try" to see the idea. ***

The following two events are mutually exclusive and complete.

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to:

[table border=0 cellpadding=5]
[row]
[ valign="middle"]
(a) The green ball will drop first into the box.
   We call this event: Green first.
[c]Attach:green_first.jpg Δ
[row]
[ valign="middle"]
(b) The red ball will drop first into the box.
   We call this event: Red first.
[c]Attach:red_first.jpg Δ

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Related Topics

  •  
to:

[tableend]

Play this applet to find out the probability of each of these 2 events.
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Questions to think about:

  • Theoretically - how often should the green ball be the first into the box?
  • What is the probability that the red ball will drop first into the box?
  • How many experimental trials did it to get this theoretical probability?
  • What other real life situations give this kind of probability?
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to:
"Mutually exclusive" meaning both events cannot happen at same time and "complete" meaning no other event can occur.
Changed lines 52-70 from:
to:
April 14, 2008, at 11:16 AM by LFS -
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  • 2 Ball Drop for Scratch-MIT designed by Linda Fahlberg-Stojanovska
to:
  • 2 Ball Drop for Scratch-MIT designed by Linda Fahlberg-Stojanovska
April 14, 2008, at 03:34 AM by LFS -
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  • Online Activity: Tossing Coins
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  • Online Activity: Mix and Drop 2 Equally Weighted Balls
April 14, 2008, at 03:32 AM by LFS -
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Page last modified on September 10, 2008, at 01:38 AM