Statistics

# Statistics - Statistics 20:03 January3,2011...

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Statistics 20:03 January 3, 2011 PSTAT 5A Statistics Binh  Pham Office Hours: 5501 South Hall [email protected]     TA’s Go To Section Meet your TA Office Hours Tuesday 2:15-3:15 9:30- Sections Classroom Section o Group or individual assignments Computer Section o Online applets In-class work is 20% of grade Quizzes 4-in class quizzes Closed book Formulas provided

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Exercises are the best model for the types of question to expect o Quiz 1 Friday January 14, 12:00-12:50 o Quiz 2 Friday February 4, 12:00-12:50 o Quiz 3 Friday, February 25, 12:00-12:50 o Quiz 4 Friday, March 11, 12:00-12:50 Statistics Organizing, interpreting, and understanding data Applying mathematics to real world numbers Using notions of probability to model and understand uncertainty The Statistics Objectives 1. Ask the Right Questions 2. Collect Useful Data 3. Summarize the data 4. Make decisions and generalizations based on the data 5. Turn the data and decisions into new knowledge Description Isn’t Enough A servey of students found that they spent 10.63 hours/week on average  studying. Adrian Peterson averages 4.9 years per carry over his career and 5.6 yd/carry  in 2007 46% of likely voters in a California survey said they plan to vote for Sen. Boxer Probability is the Mathematical Model Components of Probability
Outcomes o Possibilites Events Sample Space o Every Possible Outcome o ASA Universe or population Probability o P(A)=# of outcomes in Even A/Total # of outcomes Flip a Coin Three  o Outcomes 8 HHH, HTT, HTH, HHT, THH, THT, TTH, TTT o Probability 1/8 01.05.2011 Probability Basics Outcomes: simplest component of experiment Events: sets of outcomes that interest us Sample Space: all possible outcomes Chance of Getting One 6 What is the probability of getting at least a 6=11/36 “OR” Rule

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If A and B cant both happen simultaneously o P(A or B) = P(A) + P(B) Only if A and B are  Mutually Exclusive OR ≥U “Or” Example P(king of queen)=Let A= we pick a king B=Pick Q  o P(A or B) Simple Events Simple Event contains one outcome. o Heads, (HHH) o (1,1) o (king of Spade) Different Simple Events are Mutually Exclusive Equilly likely o P(Simple Events) = 1/(total # of outcomes) Unequal Outcomes Assign a probability to each outcome All probabilities >(les than or equal than) O. P9A)=Sim P of each outcome in A
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## This note was uploaded on 02/22/2011 for the course STAT 5a taught by Professor Pham during the Winter '11 term at UCSB.

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Statistics - Statistics 20:03 January3,2011...

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