PDB_Stat_100_Lecture_11_Printable

# PDB_Stat_100_Lecture_11_Printable - STA 100 Lecture 11 Paul...

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STA 100 Lecture 11 Paul Baines Department of Statistics University of California, Davis January 28th, 2011

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Admin for the Day I Please pick up Homework 1! (in class or outside my oﬃce) I Homework 2 returned on Monday I Midterm handed back today I Homework 3 posted, due Wednesday (5pm) I Extra oﬃce hours: Mon 9.30-11.30am, Tues 10.00-11.00am References for Today: Rosner, Ch 4.9-4.12, 5.1-5.4 (7th Ed.) References for Monday: Rosner, Ch 5.1-5.6 (7th Ed.)
Topics for Today 1. Midterm Feedback 2. Course Feedback 3. The Poisson Distribution 3.1 Computing probabilities 3.2 Expected values

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Course Feedback Thanks for the feedback – here are the results. . .
V Poor Poor Average Good Excellent Rate the Class Overall 0 20 40 60

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Too fast Little fast Just right Little slow Too slow The pace of the material. .. 0 20 40 60 80 100
Too hard Little hard Just right Little easy Too easy Homework is. .. 0 10 20 30 40 50 60 70

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Too heavy Little heavy Just right Little light Too light Workload is. .. 0 20 40 60 80 100
10 15 20 0 5 10 15 20 25 Hours spent outside of class Hours Frequency

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Too heavy Little heavy Just right Little light Too light 5 10 15 20 Hours per week by workload
Course Feedback Some common things: 1. ‘Homework is diﬀerent from the exam’ It is intended to be. Statistics requires two fundamental skills: understanding data and statistical analysis (using probability, math etc) and being able to analyze data (which requires a computer). We want to test both – homework allows more freedom to analyze data, exams require understanding of the statistics/data. 2. R is pointless’ Alas, you cannot do statistics without using computers. It would essentially be a useless class if we didn’t use any software. As far as objections to R . . . it has many faults, but. . . it is free, it works on all operating systems (sort of), and it is widely used. I wish there was a better solution. . . /

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Course Feedback More common things: 1. ‘We would like more worked examples. . . ’ Noted – we will have more worked examples! 2. ‘Discussions could be better. . . ’ Noted – we will try to improve this (more practice problems). 3. ‘More oﬃce hours please!’ Noted – please let me know a good time. . . 4. ‘Podcasts please!’ Noted – they will begin as of today. . . 5. ‘Homeworks do not match what is covered in lecture. . . ’ Noted – it is an important skill to be able to apply the ideas in lecture in diﬀerent contexts (rather than just plug-n-chug), but we will do more examples in lecture and discussion!
Midterm Overview Midterm Scoring: Your scores on each problem will not add up to your total score!!!!

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## This note was uploaded on 01/17/2012 for the course STAT 100 taught by Professor drake during the Fall '10 term at UC Davis.

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PDB_Stat_100_Lecture_11_Printable - STA 100 Lecture 11 Paul...

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