PUB/POS 316 - Spring 2010

Assignments

1. Research design
Chapter 3 ( §3) Introduction:
3.2, 3.4, 3.6, 3.7, 3.8

§3.1: 3.13, 3.14, 3.20, 3.25, 3.28

§3.2: 3.52, 3.69

§3.4: 3.99, 3.100, 3.102

2. Data summaries & displays [If you don't have the text's data CD, you can click on the live links below to download the necessary data sets. Let me know if any of these links point to the wrong data.]

§1.1: Use Excel to create the bar graph and pie chart in Fig. 1.3 from data on p. 6;
- Use Excel to create Fig. 1.4 from data in table 1.1. (Hint: enter the data set in one column in an excel spread sheet, write a proper bins array [categories], find frequency for each category, draw the graph)
- By hand create stemplots for the data in Table 1.2 (one stemplot for male percent and one for female percent). What stories can you tell from your plot?
-1.5 (by hand), 1.6, 1.7, 1.8, 1.10, 1.12, 1.17, 1.21, 1.34 (ex01-034)

§1.2: 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, and 1.53 "by hand." Check with Excel.
- 1.61 (by hand [median = middle; quartiles are medians of upper and lower halves], 1.63 (ta01-005), 1.65

§1.3 - skip

End of chapter 1 exercises: 1.160.
.

3. Scatterplots, regression and correlation as data displays and summaries
§2.1: Replicate Example 2.6 (sctterplot of SAT scores eg02-006)
- 2.9, 2.25 (ta02-003)
§2.2: 2.30 (ex02-030), 2.31 (ex02-031). (Comment on the scatterplot patterns, R-squared and the size of the correlations.)
- 2.42.
§2.3: 2.57, 2.63
§2.4: 2.85 (ex02-085)
- 2.96 (ex02-096) You can compute the correlations in part (b) just by finding the square root of R-squared and putting on the correct sign.)

4. Two-way tables.

§2.5:
In these exercises you are using bar charts to help tell stories about the data.
- 2.111 [Just type in this data in an Excel spreadsheet (the text's Excell file for this data is not arranged like the table in the the statement of 2.111 and is not very helpful); for part (c) use a bar (or column) chart],
- 2.112 [to display this distribution, you don't have to make a new chart -- you can just use the chart set up for 2.111 and ask for a stacked bar chart],
- 2.113 [here again, you can use the same chart and tell Excel to "sort by" rows -- I found the command in the "chart data" part of the formatting palette]

§2.6:
2.123, 2.126, 2.134

5. Case I: Presenting data

6. Normal Distribution and sample means

[Note: When the book says a distribution is N(x,y), it means it is 1) it is normally distributed, 2) the mean is x, and the standard deviation of y]

§1.3:
Draw a normal distribution graph to illustrate how many hours a day you sleep,
Make sure you can redo Example 1.28(p.64) – nothing to write.
1.103(p.66), 1.104(p.66)

§5.2:
5.42 (hint: the Central Limit Theorem), 5.48, 5.58 (only a)

7. Proportions and Confidence intervals

§5.1 Proportions:
5.22, 5.23, 5.24

§6.1: Confidence intervals
6.10, 6.13, 6.15, 6.19, 6.26, 6.31

8. Hypothesis testing

§6.2:
6.50, 6.52, 6.55, 6.56, 6.58, 6.59, 6.64, 6.68, 6.71, 6.73

§6.3:
6.86, 6.87, 6.95

9. Inferences for mean and proportions

§7.1 Means:
7.8 (p.431), 7.9, Example 7.9 (p.434), 7.34

§7.2: Comparing two means
Example 7.14 (p.452), 7.61.

§8.1 Proportions:
8.11, 8.14 [for (b), Compute a confidence interval and see if it overlaps with (a); ignore the sentence about "P-value"]
8.17 [ignore the "Challenge" label -- should be do-able], 8.18, 8.32

§8.2: Comparing two proportions
Do 8.41 using the method in this section, e.g., Example 8.9. Redo 8.14 using the method in 8.2 for comparing two proportions.

10. Inferences – Understandings:

Read these two studies (1, 2). Write a half a page report for each of them (typed – double spaced). Be ready to discuss them in the class.

11. Analysis of two-way tables (chi-square and crosstabs), Regression

§9.1 & 9.2
Exercises begin on p. 548: 9.7 (can you still do these graphs!?), 9.9, 9.12, 9.20, 9.35

§10.1 & 10.2: Exercises begin on p. 594: 10.6, 10.8, 10.9, 10.10 (Table for 10.10 : ta10_001).

12. Case II: Air Pollution and Mortality

13. Optional Assignment  - ONLY one of these options :

Option 1 : Chapter 1: 1.63, 1.103, chapter 2: 2.30, 2.63, 2.111, 2.112, chapter 3: 3.28, 3.102, Chapter 10: 10.11

OR

Option 2: Answer to the second test questions.