Wednesday, September 16, 2015

9/16 Lesson 1.2.3 Changing the Sample Space

1.  Warm-up:  Decide whether each situation represents experimental or theoretical probability.  Explain your choice.
  • To determine the probability of landing on red, Susan spins the spinner 50 times
  • Mike notices there are 5 red marbles, 3 green, and 2 blue.  He determines there is a 20% chance of selecting a blue marble.
  • Tomiko keeps a detailed weather journal.  Last year, it rained once in September; therefore, she has determined that there is a 1 out of 30 chance of rain today.
2.  Citizenship rubrics

3.  Notes:  Sample space- represents all of the possible outcomes

4.  Prediction:  A deck of playing cards has 4 kings out of 52 total cards.  If I double the sample space, meaning I combine two decks of cards, will the probability of choosing a king change?  Explain your prediction.

5.  Lesson 1.2.3

  • Objective:  I will describe what happens to the probability of an event when the sample space is changed.


6.  Closure:  
  • Confirm or deny your original prediction.  Explain your reasoning.
  • Problem 1-78 b)  What change can you make to increase the probability of selecting a blue block?

Homework:  Lesson 1.2.3 R/P due Thursday