MATH 380

Checklist  for  Test 2,   November 21,  2003


The test covers chapters 5  (5.1-5.7),  6 (6.1-6.5)  and 7 (7.1-7.3).  
However, basic issues  related to prior chapters may and shall necessarily 
appear.


1.	Continuous random variables, their cumulative distribution functions, 
density functions. 

2.	Calculating probabilities involving random variables from the  "functions"  
listed in  1.

3.	Expectations, variances;  calculating expectations of random variables 
from mass/density functions.  Expectations of  functions  of random variables.

4.	Standard continuous random variables,  particularly uniform,  exponential,  
normal.  Should know the formulae for mass/density/c.d. functions  
(whichever applicable),  and for expectations in terms of the parameters.  
Should know how to figure out normal probabilities using tables or calculators.   
Last but not least, you should be able to identify the distribution which 
fits best a given "real-life" situation.

5.	Binomial probabilities via normal approximations.

6.	What does it mean for two random variables to be independent?  

7.	Joint mass/density functions,  marginal mass/density functions,  
independence in this context.  
Calculating the same as in 2 and 3 in this context,  the role of independence.  
Conditional mass functions.

8.	Properties of expectation  (linearity and such,  the role of independence 
in this context).  Covariance and correlation. 

You are allowed  a  one page (one-sided)  ³formula  sheet².
Tables of normal probabilities will be provided.