1. 1-1: Tables and Graphs FST Chap 1: Exploring Data

2. Activity Write four digits (0, 1, 2, …, 9) down at random on four scraps of paper. You may use a digit more than once.

3. Against All Odds Video Series: Statistics

4. Definitions Statistics: Data: Variable: Branch of Mathematics dealing with the collection, organization, analysis, and interpretation of information, usually numerical information. Information, usually numerical A characteristic of a person or thing which can be classified, counted, ordered, or measured.

5. Definitions Population: Sample: Random Sample: The set of all individuals or objects of interest The subset of a population that is studied in an experiment A sample in which each member of the population is equally likely to be chosen.

6. Definitions Survey: Census: A gathering of facts or opinions through an interview or questionnaire A survey of an entire population

7. Example 1 A medical laboratory technician counts the number of white blood cells in a drop of a patient’s blood. Identify the Variable: Population: Sample:

8. Reading a Table Questions to ask yourself: 1.What is being presented? Variables, Units, etc 2.Are the data trustworthy? Source, Accuracy, Precision 3.What conclusions can you draw from the data?

9. Example 2 Refer to the table on page 7 (Income of Households). Assume the “householder” is the head of a household. a.How many times as likely was a family to have an income of at least $75,000 if the head of the household had graduated from college rather than not completed high school? b.Describe how the median income of a family is related to the level of education of the head of the household.

10. Graphs Bar Graphs - One variable is categorical, the other is numerical Circle Graphs (Pie Charts) - Data consists of a sum and its component parts

11. Additional Example Here are the approximate areas and populations (1995 estimates) of the continents of the world. Source: 1996 World Almanac and Book of Facts. a. Construct a circle graph of the areas. b. If the areas of the continents were measured in km 2, would the circle graph for area be different? c. Construct a circle graph of the populations. d. How do the circle graphs indicate which continents have more people for their area? Continent Area (1,000 mi 2 ) Population (millions) Africa11,700878 Antarctica5,4000 Asia17,4003,340 Australia3,30029 Europe3,800714 North America9,400292 Central & South America6,900481

12. Homework pp 10-12: 6-8, 10-12, 16-19