INTRODUCTION TO STATISTICAL MODELLING IN R

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P.M.E.Altham, University of Cambridge 31Hire (per week).Fit the modellog(price) ~ place + itemand interpret the results. Note that this model is more appropriate thanprice ~ place + itemcan you see why? Which is the most expensive resort? How are your conclusionsaltered if you remove the final column (ie car-hire) in the Table?Finally, for the racing enthusiasts:for the Cheltenham Gold Cup, March 18, 2004, I computed the following table ofprobabilities from the published Bookmakers’ Odds:thus, eg .6364 corresponds to odds of 4-7 (.6364 = 7/11).In the event, BestMate was the winner, for the 3rd year in succession! (Note addedNovember 3, 2005: sadly BestMate has just died.)Corals WmHills Ladbrokes Stanleys ToteBestMate .6364 .6364 .6364 .6000 .6000TheRealBandit .125 .1111 .0909 .1111 .1111KeenLeader .0909 .0909 .0833 .0909 .0769IrishHussar .0667 .0909 .0909 .0833 .0833BeefOrSalmon .0909 .0769 .0909 .0769 .0667FirstGold .0833 .0769 .0909 .0769 .0769HarbourPilot .0588 .0667 .0588 .0588 .0588TruckersTavern .0476 .0588 .0667 .0588 .0588SirRembrandt .0385 .0294 .0294 .0294 .0244AlexB’quet .0149 .0099 .0099 .0149 .0149Suggestion:x
Chapter 6A 2-way layout with missing data,ie an unbalanced designThis shows an example of an unbalanced two-way design.These data are taken from The Independent on Sunday for October 6,1991. Theyshow the prices of certain best-selling books in 5 countries in pounds sterling. Thecolumns correspond to UK, Germany, France, US, Austria respectively. The newfeature of this data-set is that there are some MISS<strong>IN</strong>G values (missing for reasonsunknown). Thus in the 10 by 5 table below, we useNA to represent ‘not available’ for these missing entries.We then use ‘na.action...’ to omit the missing data in our fitting, so that we willhave an UNbalanced design. You will see that this fact has profound consequences:certain sets of parameters are NON-orthogonal as a result. Here is the data frombookpr14.99 12.68 9.00 11.00 15.95 S.Hawking,"A brief history of time"14.95 17.53 13.60 13.35 15.95 U.Eco,"Foucault’s Pendulum"12.95 14.01 11.60 11.60 13.60 J.Le Carre,"The Russia House"14.95 12.00 8.45 NA NA J.Archer,"Kane & Abel"12.95 15.90 15.10 NA 16.00 S.Rushdie,"The Satanic Verses"12.95 13.40 12.10 11.00 13.60 J.Barnes"History of the world in ..."17.95 30.01 NA 14.50 22.80 R.Ellman,"Oscar Wilde"13.99 NA NA 12.50 13.60 J.Updike,"Rabbit at Rest"9.95 10.50 NA 9.85 NA P.Suskind,"Perfume"7.95 9.85 5.65 6.95 NA M.Duras,"The Lover"‘Do books cost more abroad?’Sunday.was the question raised by The Independent onp
Page 1: INTRODUCTION TO STATISTICALMODELLIN
Page 4 and 5: PrefaceR is available as Free Softw
Page 6: Chapter 1Getting started: books and
Page 9: Chapter 2Ways of reading in data, t
Page 13 and 14: P.M.E.Altham, University of Cambrid
Page 29 and 30: Chapter 5A 2-way anova, how to set
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Page 39 and 40: Chapter 8The space shuttle temperat
Page 59 and 60: Chapter 12Fisher’s exact test, 3-
Page 63 and 64: Chapter 13Defining a function in R,
Page 65 and 66: zbP.M.E.Altham, University of Cambr
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Chapter 18Crime and unemployment: a
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P.M.E.Altham, University of Cambrid
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Chapter 19Maximising a multi-parame
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Chapter 22Brief introduction to Sur
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IndexAIC, 36.Rdata, 10.Rhistory, 10
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