INTRODUCTION o We are frequently reminded of the fact that we are living in the information age. Appropriately, then this subject is about information -how it is obtained, how it is analyzed, and how it is interpreted. The information about which we are concerned are called data and the data are available to us in the form of numbers
I. INTRODUCTION We are frequently reminded of the fact that we are living in the information age. Appropriately, then, this subject is about information—how it is obtained, how it is analyzed, and how it is interpreted. The information about which we are concerned are called data, and the data are available to us in the form of numbers
Question 1 v We aim to explore whether smoking is harmful to your health v How to explore? Lung cancer, Heart disease, other diseases?
Question 1 ✓ We aim to explore whether smoking is harmful to your health. ✓ How to explore? Lung cancer, Heart disease, Other diseases?
Lung cancer smoking a/(a+b) no lung cancer b compare→ conclusion Lung cancer non- smoKIng (c+d) no lung cancer
a smoking non - smoking Lung cancer b cd a/(a+b) c/(c+d) compare conclusion Lung cancer no lung cancer no lung cancer
Smoking group Non-smoking group ong can you Ive? stop. you Burn your life flower
Non -smoking group Smoking group
Question 2 It is obvious that generally men are taller than women. while some other women are taller than men Therefore, if you wanted to 'prove that men were taller, you should measure many people of each sex How many people should you measure?
Question 2 It is obvious that generally men are taller than women, while some other women are taller than men. •Therefore, if you wanted to ‘prove’ that men were taller, you should measure many people of each sex. • How many people should you measure?