INTRODUCTION TO STATISTICAL MODELLING IN R

P.M.E.Altham, University of Cambridge 4745-64.Key to data framey= Frequency of observationclass71= social class in 1971; this is a factor with levels ‘I’, professionals, ‘II’ semiprofessionals,‘IIIN’ skilled non-manual, ‘IIIM’ skilled manual, ‘IV’ semi-skilled, ‘V’unskilledclass81= social class in 1981; also a factor, same levels as for 1971.The source for these data was D. Blane and S. Harding and M. Rosato (1999) “Doessocial mobility affect the size of the socioeconomic mortality differential?: Evidencefrom the Office for National Statistics Longitudinal Study” JRSS-A, 162 59-70.Here is the dataframe ‘cmob’.y class71 class811 1759 I I2 553 I II3 141 I IIIN4 130 I IIIM5 22 I IV6 2 I V7 541 II I8 6901 II II9 861 II IIIN10 824 II IIIM11 367 II IV12 60 II V13 248 IIIN I14 1238 IIIN II15 2562 IIIN IIIN16 346 IIIN IIIM17 308 IIIN IV18 56 IIIN V19 293 IIIM I20 1409 IIIM II21 527 IIIM IIIN22 12054 IIIM IIIM23 1678 IIIM IV24 586 IIIM V25 132 IV I26 419 IV II27 461 IV IIIN28 1779 IV IIIM29 3565 IV IV30 461 IV V31 37 V I32 53 V II33 88 V IIIN34 582 V IIIM