1. Introduction to Statistics
Form 1 Mathematics
Chapter 12

2. 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

3. 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

4. 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, …

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

6. 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

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

8. 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

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

10. 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

11. 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

12. 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

13. Data organization

14. 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

15. 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 =
= 17
Grade
Tally
Frequency

16. 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)

17. 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)

18. Enjoy the world of Mathematics!
Ronald HUI