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Stat 200 Homework Assignment Week #8 Dr T

This week we must read

Lane et al. Lane et al. Chapter 15 Illowsky et al. Chapter 13

Do the problems listed below, and submit them in your Assignment Folder by Thursday.

Answer the questions in each problem and do not submit any Excel spreadsheets or any other program’s output. Submit only what is asked.

Fill in all the blanks and don’t run all the answers in one line.

Lane et al. CHAPTER 15

Page 570:

#10. If an experiment is conducted with 5 conditions and 6 subjects in each condition, what are dfn and dfd?

dfn = ______________

dfd = ______________

#12: What are the two components of the total sum of squares in a one-factor between-subjects design?

#13: How is the mean square computed from the sum of squares?

Illowsky et al. CHAPTER 13:

Page 724:

#61, 62, 63:

Use the following information to answer the next three exercises, 61, 62, &63.

Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their drivers licenses.

	Northeast	South	West	Central	East
	16.3	16.9	16.4	16.2	17.1
	16.1	16.5	16.5	16.6	17.2
	16.4	16.4	16.6	16.5	16.6
	16.5	16.2	16.1	16.4	16.8
x=	16.325	16.5	________	_______	_______
s2 =	0.029166667	0.086666667	________	_______	_______

Table 13.20

HA: At least two of the group means are not equal.

61. Degrees of freedom numerator: df(n) = _______________

62. Degrees of freedom denominator: df(d) = _______________

63. F-statistic = ____________ P-value = ___________ F-critical = __________ Decision: ___________ Conclusion: __________

Page 725:

#67: Table 13.23 lists the number of pages in four different types of magazines.

Home Decorating	News	Health	Computer
172	87	82	104
286	94	153	136
163	123	87	98
205	106	103	207
197	101	96	146

Using a significance level of 5%, test the hypothesis that the four magazine types have the same mean length. Give the following:

1. Null and Alternative Hypotheses.

2. df(n) = ______ df(d) = _______

3. F-statistic = __________

4. P-value = ___________

5. F-critical = __________

6. Decision: ___________

7. Conclusion: __________