IOP2601_Tutorial Workbook Memo. MUST HAVE!

IOP2601_Tutorial Workbook Memo. MUST HAVE! DESCRIPTIVE STATISTICS BASIC MATHEMATICAL CALCULATIONS S3 SUMMATION NOTATION/SOMMASIE-NOTASIE We are now working with the first set of ungrouped data that we provided on the first page. Ons werk nou met die eerste stel data of ongegroepeerde data wat ons op die eerste bladsy verskaf het. Complete the table by doing all the summation notations (SU 3, Tutorial 24). Voltooi die tabel deur al die sommasie-notasie (SE 3, Tutorial 24) te doen. For all the computations you need to do later on, you will only substitute the values in this summation table in the different formulas. So make sure that you work very accurately and that all your calculations are correct. Vir al die berekeninge wat jy later moet doen, is dit net nodig om die waardes in die formules te vervang. Maak dus seker dat jy akkuraat werk en dat al jou berekeninge korrek is. X = Score on assignment question/Punte vir werkopdragvraag Y = Score on examination question/Punte vir eksamenvraag Student X Y X² Y² XY A B C D E F G H I J 1 2 2 2 3 4 5 7 7 8 5 4 5 6 8 7 8 7 8 8 1 4 4 4 9 16 25 49 49 64 25 16 25 36 64 49 64 49 64 64 5 8 10 12 24 28 40 49 56 64 N = 10 X = 41 Y = 66 X² = 225 Y² = 456 XY = 296 (X)² = (41)² = 1 681 (Y)² = (66)² = 4 356 XY = (41)(66) = 2 706 - 2 - DISPLAYING DATA SU 4 UNGROUPED DATA/ONGROEPEERDE DATA We obtained two sets of data (X and Y) from IOP2601 students. The X-scores represent a question from an assignment and the Y-scores a similar question from the examination paper. Student X Y A B C D E F G H I J 1 2 2 2 3 4 5 7 7 8 5 4 5 6 8 7 8 7 8 8 FREQUENCY TABLE/FREKWENSIETABEL  ASSIGNMENT SCORES/WERKOPDRAGPUNTE X f 1 2 3 4 5 7 8 1 3 1 1 1 2 1 N = 10  EXAMINATION SCORES/EKSAMENPUNTE Y f 4 5 6 7 8 1 2 1 2 4 N = 10 FREQUENCY BAR CHART/FREKWENSIESTAAFDIAGRAM