Segment

Time

 Collect solutions to Page 5 problems.
 Emphasize that we will use these for comparison
purposes later in the unit (i.e., THEY will compare their earlier
thinking with their current thinking).


Discuss homework
 Reminder of homework policy
 Questions


Discuss "Probabilistic situations"
 It is not the situation per se that is or
is not probabilistic. It is the way you imagine it being
that is or is not probabilistic.


Examples. (PowerPoint) Are the situations
entailed in these statements probabilistic? If not, rephrase the statement
so that it entails a probabilistic situation. (Be open to the possibility
that a statement cannot be so rephrased.
 The probability that the next U.S. Attorney General
is a woman
 The probability that you will be able to read newspapers
more intelligently after this course
 The probability that a it will snow tomorrow
 The probability that (etc.)


Determining probabilities
 Emprically
 Theoretically


Toss three coins. What is prob of 2 heads?
 Step 1 – rephrase the situation
 Step 2 – determine empirically or theoretically
 When determining theoretically, want to determine
in a way that we are assured it will match empirical results.


Terms
 Experiment
 Outcome
 Sample space
 Event


Homework

