Basic Probability

Part 1: Mon, March 15th

Review of Basic Probability

Formula for p = f / NOr…p = # possible ways to get outcome of interest

total # possible outcomes

Denominator (total # possible outcomes) also called “Sample Space” (S)

(cont.)

Sampling w/replacement – each individual (outcome) is replaced into population before next selection

Sampling w/o replacement – once a person (outcome) is chosen, it is kept out of remaining population

Lab 14

Use applets to demonstrate probability concepts

Focus on sample space (all possible outcomes)– If a binomial problem (only 2 possible outcomes

on each trial), can determine total # possible outcomes using 2n, where n=# trials

– Shoot 3 free throws – what is samp space? Should have 23 = 8 outcomes

– HHH, HHM, HMH, MHH, HMM, MHM, MMH, MMM

(cont.)

Use unit normal table to determine probabilities (instead of %s) associated with different z scores

Remember z = (x – xbar) / Sx