SI 544 Introduction to Statistics and Data Analysis
 Resources SI 544 home cTools Readings, assignments, etc. will be posted to the course ctools website problem sets software tools for the class instructor: Lada Adamic

 Schedule Fall 2010: Lectures will be Tuesdays and Thursdays from 8:30 to 10:00 am. Location NQ1255 Office hours: TuTh 10:00-10:30 and Fri 2-3pm in NQ4360

PS2 Probability
 1. 5 pregnant women 5 pregnant women are sitting around a table. A (20pts). What is the probability that all of them will have boys? B (20pts). What is the probability that one will have a girl, while the rest have boys? 2. UofM graduation rates By looking at statistics for UofM freshman enrollment by ethnicity, you know that the probability of a freshman being black is 0.08 (8%), asian is 0.13, hispanic is 0.06, and white/other is 0.73. You also know that the 4-year graduation rates for those groups are 0.51 (black), 0.76 (asian), 0.67 (hispanic), and 0.75 (white/other). A (20 pts). Draw a probability tree with the first branching corresponding to ethnicity, and the second corresponding to whether the student graduated in four years or not. B (20 pts). What is the probability that a student does not graduate in 4 years? C (20 pts). What is the probability that a student who graduated in 4 years is black? That is, given that he/she graduated in 4 years, what is the probability that he/she is black?