math 160 Exam #2

math 160 Exam #2

1. Chapter 4

   • Sample Space S
     • Random Phenomenon that all of all possible outcomes. 
     • Probability Models
   • Probability Rules
     • Rule 1. Any probability is a # between 1 and 0
       • Rule 2. All possible outcomes together must have probability. P(s)=1
         • Rule 3. two events must be non-dependant or disjoint to add probabilities P(A or B) P(A)+P(B)
           • Rule 4. The complement of any event A is the event that A
   • Event
     • An event is an outcome or set of outcomes of a random phenomenon. 
   • Sample Mean
     • Sample mean xbar is useful to get the mean from a skewed distribution. Get the Simple Random Sample (SRS) or N get the same mu(mean) and Sd Mu, xbar= mu sdx = sd/ squareroot of N Sample mean problems: 5.10 5.11 5.14 5.16! 5.17

2. Chapter 5

   • Binomial Distributions