STAT1070: Tutorial and Lab 1 Statistics, data and jamovi Summer, 2024 THE UNIVERSITY OF NEWCASTLE AUSTRALIA Tutorial questions 1 Understanding variables 1. What are some of the variables (characteristics) that we may wish to record if collecting data about pieces of paper? Write down at least 5 possibilities. 2. To answer the previous question properly, we really need to know WHY we are collecting the data. What are we trying to find out? Which of the variables you suggested would be most relevant in a study to determine the kind of paper that reliably produces satisfactory copies in a photocopier? Which would be relevant if we were deciding what kind of paper to use to write ourselves a reminder to pick up some bread and milk? 3. Identify the variable type (continuous, discrete, ordinal or nominal) and the best graph to visualise the distribution for each of the variables you have suggested. 2 Understanding data tables The data in Table 1 are a subset of data from a study of male heart attack patients admitted to a hospital in Auckland, N.Z. Every patient has the following information measured and recorded. Source: Wild and Seber. (2000) Chance Encounters: A First Course in Data Analysis and Inference. Wiley, New York. Page 39. List of Variables for Heart Attack Data Set ID: A patient identifier instead of a name to protect a patient's privacy. EJEC: Ejection fraction, the percentage of blood in the left ventricle of the heart ejected in one beat. SYSVOL: End-systolic volume, a measure of the size of the heart. This is calculated from a two dimensional silhouette picture of the left ventricle at its smallest part. DIAVOL: End-diastolic volume. The same as SYSVOL, except that the largest silhouette is used. OCCLU: Occlusion score, or, percentage of the myocardium of the left ventricle supplied by arteries that are totally blocked. STEN: Stenosis score, or percentage supplied by the arteries that are significantly narrowed but not completely blocked. TIME: Time in months from when patient was admitted until OUTCOME occurs.
STAT 1070: Tutorial and Lab 1 Statistics, data and jamovi ID EJEC SYSVOL DIAVOL OCCLU STEN TIME OUTCOME AGE SMOKE BETA CHOL SURG 390 279 391 62 52 137 33 201 50 202 50 69 27 310 60 392 72 311 60 393 63 70 203 394 204 280 55 79 205 206 43 85 150 312 60 80 281 207 44 121 27 66 139 282 51 396 63 58 157 0 208 49 209 283 58 71 167 210 42 397 68 211 43 146 259 47 33 398 67 284 399 285 71 286 212 400 287 81 39 144 813 68 30 288 407 67 72 36 52 74 155 37 165 47 124 170 77 23 86 215 7 5G 37 132 40 10 65 163 0 40 142 52 140 29 48 69 133 0 27 142 59 54 133 30 13 142 50 67 135 37 63 141 53 65 138 0 33 140