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Introduction to Statistics and Research Design

 

Assignments

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Homework...

For the weekend of 9/9

Watch television, or listen to the radio, and find an example of a misleading statistic (pharmaceutical ads are great for this), along with its hidden qualifying statement. Bring what you consider to be the best example to class for discussion on Tuesday

Scan your daily newspaper or weekly news magazine for articles that contain numerical data. The data might be a summary of the results of a public opinion poll, the results of a vote by the US Senate, or a list of crime rates, birth or death rates, etc. For each article you find, answer the following questions. Further, bring what you consider to be the best example to class for discussion on Tuesday

 1. Do the data constitute a sample or an entire population? If a sampe has been taken, clearly identify both the sample and the population; otherwise, identify the population

2. What type of data (quantitative or qualitative) has been collected?

3. What is the data source?

4. If a sample has been observed, is it likely to be representative of the population?

5. If a sample has been observed, does the article present an explicit (or implied) inference about the population of interest? If so, state the inference made in the article.

6. If an inference has been made, has a measure of reliabilty been included? What is it?

7. Use your answers to 4.-6. to critically evaluate the article.

For the weekend of 9/16

Using the data below taken from 9 packets of M and M's, answer the following questions

subject1

subject2

subject3

subject4

subject5

subject6

subject7

subject9

subject10

total

mean

sd

red

13

16

11

7

12

16

11

16

11

113

12.56

3.05

blue

6

6

6

5

7

8

5

2

8

53

5.89

1.83

green

6

3

9

4

6

4

8

4

6

50

5.56

2.01

yellow

14

12

11

17

6

10

12

11

9

102

11.33

3.08

orange

9

5

6

8

6

6

5

6

8

59

6.56

1.42

brown

11

15

14

15

21

12

16

18

15

137

15.22

2.99

total

59

57

57

56

58

56

57

57

57

514

57.11

0.93

sd

3.43

5.54

3.15

5.39

6.02

4.32

4.32

6.57

3.15

36.60

What is the distribution of different colors of M+M's?

What is the average number per bag?

What is the average # per color per bag?

What is the best way to report the results?

What is the n of this experiment?

For some suggestion presentation formats, see here

 

Labs

Go to:

Lab 1, 9/11

Lab 2, 9/18

Lab 3, 9/25

Lab 4, 10/2

Lab 5, 10/9

Lab 6, 10/16

Lab 7, 10/23

Lab 8, 10/30*

Lab 9, 11/6

Lab 10, 11/13

*no classes due to faculty retreat. Students will be required to attend lab and work with TAs to complete this lab.

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