Introduction to Statistics Form 1 Mathematics Chapter 12

Reminder Lesson requirement Before lessons start Textbook 1B Workbook 1B Notebook Before lessons start Desks in good order! No rubbish around! No toilets! Keep your folder at home Prepare for Final Exam

Statistics (統計學, p.210) A subject that deals with handling data 4 Key stages of statistics: Collection of Data Get data for study Organization of Data Group data by table, by order Presentation of Data Use diagrams to show data Analysis of Data Make some suitable conclusions

Data collection (p.211) Previous Information Questionnaire Observation Books, newspapers, magazines, websites, … Questionnaire Set out forms, questions on the websites, … Observation Sightseeing, counting, … Experiment Test, measurements, … Interview Written surveys, telephone conversation, …

Data collection (p.211) Previous Information, Questionnaire, Observation, Experiment, Interview (a) Observation (b) Questionnaire (c) Previous Information (d) Experiment

Data classification (p.213) Discrete data (離散數據) are data with specific values and probably countable E.g. size of shoes:, number of people in cinema Remark: Nominal data (名目數據) are discrete such as favourite football players Continuous data (連續數據) are data with approximate values and probably could only be grouped E.g. height of students, degree of shortsight Remark: Approximation on measurements could be treated as discrete

Data classification (p.213) Discrete data or Continuous data (a) Continuous data (b) Discrete data (c) Continuous data (d) Continuous data

Data collection and data classification (a) The data collected is accurate (準確) as they will report the exact number of lavatories. (b) No, it is not effective. The data might be incomplete as NOT ALL questionnaires will come back. (c) Discrete data

Time for Practice Pages 214 – 215 of Textbook 1B Questions 1 – 4 Page 95 of Workbook 1B Questions 1 – 2

Number of times visited Disneyland Data organization (p.216) Number of times visited Disneyland: 1　1　2　0　2　0　0　0　0　1 0　1　0　0　0　0　0　2　0　1 Tallying: Frequency distribution table Number of times visited Disneyland Tally Frequency //// //// // 12 1 //// 5 2 /// 3

Data organization (p.216) Height of students (in cm): 170　168　173　171　169　174　180　166 173　175　170　165　166　178　175　171 181　172　173　176　167　172 Tallying in groups: Heights (cm) Tally Frequency 165 – 169 //// / 6 170 – 174 //// //// 10 175 – 179 //// 4 180 – 184 // 2

Time for Practice Page 218 of Textbook 1B Page 219 of Textbook 1B Class Practice Page 219 of Textbook 1B Questions 1 – 4 Pages 98 – 100 of Workbook 1B Questions 1 – 5 Missing table for SHW (I) Question 7

Data organization

Data organization (a) B C C B C B B D D C D E B C B A C E B D C D E D E E C A E A C D D D E D

Data organization . (c) The number of students failed . = 10 + 7 (a) B C C B C B B D D C D E B C B A C E B D C D E D E E C A E A C D D D E D . (c) The number of students failed . = 10 + 7 . = 17 Grade Tally Frequency

Data presentation and analysis (p.221) Pictogram (象形圖) Bar chart (棒形圖) Pie chart (圓形圖) Broken-line graph (折線圖) Stem-and-leaf diagram (幹葉圖) Scatter diagram (散點圖)

Reminder Missing HW SHW (I) SHW (II) SHW (III) – to be given Detention SHW (I) 16th April (Tuesday) SHW (II) 17th April (Wednesday) SHW (III) – to be given OBQ – to be confirmed CBQ 24th April (Wednesday)

Enjoy the world of Mathematics! Ronald HUI