1. Can students tell bottled water from tap water?
Go to the corresponding station on your index card. Pick up three cups (labeled A, B, and C) and take them back to your seat.
Your task is to determine which one of the three cups contains the bottled water. Drink all of the water in cup A first, then the water in cup B, and finally the water in cup C. Write down the letter of the cup that you think held the bottled water. Do not discuss your results with any of your classmates yet!
While you taste, your teacher will make a chart on the board like this one:
Station number Bottled water cup? Truth

2. BE VERY CAREFUL WHEN SITTING
Do not begin the taste test until given further instructions
Please be cautious of the cups around you

3. Bottled Water Reveal
Plate 1: C
Plate 2 and 3: A
Plate 4 and 5: B

4. 1.2: Drawing Conclusions from Data
Quiz tomorrow; test Tuesday

5. Statistical Problem-solving Process
ASK A QUESTION OF INTEREST
It should involve some characteristic that varies from individual to individual
II. PRODUCE DATA
the methods of choice are observational studies and experiments
III. ANALYZE DATA
graphs and numerical summaries are used to describe patterns, as well as deviations from a pattern
INTERPRET RESULTS
answer the question of interest
Have the students label the opening lab with these four steps

6. Who has tattoos? ASK A QUESTION OF INTEREST
What percent of U.S. adults have one or more tattoos?
II. PRODUCE DATA
The Harris Poll conducted an online survey of adults in 2008
III. ANALYZE DATA
From the pie chart, 14 % said they had one or more tattoos. From the bar graph, males and females responded similarly.
IV. INTERPRET RESULTS
In this sample of adults, 14% said they had one or more tattoos.

7. SAMPLING VARIABILITY
A different sample of 2302 adults might yield different results
What are some possible sources for this variation?

8. Example (Sampling variability) How prevalent is cheating on tests?
The Gallup Poll Organization conducted an Internet survey of students, aged 13 to 17, between January 23 and February 10, The question they posed was “Have you, yourself, ever cheated on a test or exam?”
If another 1200 students are sampled, describe the % you might get? Why?

9. What’s wrong with this picture?

10. Analyzing Categorical Data
Graphs: Good and Bad
Bar graphs compare several quantities by comparing the heights of bars that represent those quantities.
Our eyes react to the area of the bars as well as height. Be sure to make your bars equally wide.
Avoid the temptation to replace the bars with pictures for greater appeal…this can be misleading!
Analyzing Categorical Data
Alternate Example: The following ad for DIRECTV has multiple problems. See how many your students can point out. First, the heights of the bars are not accurate. According to the graph, the difference between 81 and 95 is much greater than the difference between 56 and 81. Also, the extra width for the DIRECTV bar is deceptive since our eyes respond to the area, not just the height.
Alternate Example
This ad for DIRECTV has multiple problems. How many can you point out?

11. To do: Complete the “What’s wrong with this picture” hallway activity
Turn-in answers, and pick-up 1.2 summary
QUIZ TOMORROW: You may use the two homework sheets: 1.1 and 1.2 Summary (answers are on the blog)

12. 1.2: Drawing Conclusions from Data
Quiz tomorrow; test Tuesday

13. Statistical Problem-solving Process
ASK A _____________ OF INTEREST
It should involve some characteristic that varies from individual to individual
II. _______________ DATA
the methods of choice are observational studies and experiments
III. _______________ DATA
graphs and numerical summaries are used to describe patterns, as well as deviations from a pattern
________________ RESULTS
answer the question of interest
Have the students label the opening lab with these four steps

14. Who has tattoos? ASK A QUESTION OF INTEREST
What percent of U.S. adults have one or more tattoos?
II. PRODUCE DATA
The Harris Poll conducted an online survey of adults in 2008
III. ANALYZE DATA
From the pie chart, 14 % said they had one or more tattoos. From the bar graph, males and females responded similarly.
IV. INTERPRET RESULTS
In this sample of adults, 14% said they had one or more tattoos.

15. ______________ VARIABILITY
A different sample of 2302 adults might yield different results
What are some possible sources for this variation?

16. Example (Sampling variability) How prevalent is cheating on tests?
The Gallup Poll Organization conducted an Internet survey of students, aged 13 to 17, between January 23 and February 10, The question they posed was “Have you, yourself, ever cheated on a test or exam?”
If another 1200 students are sampled, describe the % you might get? Why?

17. What’s wrong with this picture?