STUDY GUIDE FOR STAT 301T EXAM 2



STUDY GUIDE FOR STAT 301T EXAM 3

FALL 2008 UPDATED DECEMBER 2, 2008

1. Review homeworks 10 through 14, and labs 10 through 13.

2. Review the textbook chapters 15, 18, 19, 20, 21, 23 AND 25. Look at the highlighted boxes within each chapter and the summary at the end of each chapter.

3. Some subjects in chapters 19, 20 and 21 were skipped and will not be on the exam, including: CH 19: F tests, page 477; CH 20: “plus 4 method”, page 499; CH21: “plus 4 method”, page 517.

4. You will need to be able to use your calculator to determine mean and standard deviations of data.

5. There will be calculation problems and concept questions.

The calculations problems will be similar to problems given in homework 10 - 14.

Calculations include:

A. Calculate confidence intervals, chapters 18-21.

B. Calculate the test statistic, chapters 15, 18-21, 23 and 25

C. Understand the difference between the matched pair t test, chapter 18, and the two-sample t test, chapter 19. In lab 11 compare the matched pair t test with the two-sample t test.

D. Determine the tail area and P Value for one-side and two-side tests.

E. Do calculations regarding the sampling distribution of p-hat, chapter 20.

Calculate the sample size for a given margin of error, confidence level and p*, chapter 20.

F. Calculation of Chi Square expected values, degrees of freedom, Chi Square contributions and P Value, Ch23.

G. Calculation of Anova degrees of freedom between groups and within groups, mean square between groups and within groups, F ratio and P Value Ch25

6. The concept questions will generally have multiple choice, fill in a blank or true/false answers. Concepts include:

A. Principles of Confidence Intervals and Tests Of Significance, (hypothesis testing), chapters 15, and 18 through 21, 23 and 25.

Writing the null and alternate hypotheses for chapters 15,18-21, 23 and 25.

P Value vs alpha and the decision regarding rejection of the null hypothesis.

Equivalence between confidence intervals and two-sided hypothesis tests.

Robustness of t procedures against skewness, p448 and p473.

Effect of confidence level on margin of error.

Effect of sample size on margin of error.

Effect of proportion on margin of error.

Effect of confidence level and margin of error on sample size required for proportion sampling. Value of p* to use when population proportion is unknown

B. Principles of the sampling distribution of the sample proportion, p-hat, chapter 20.

Criteria for valid confidence interval, p497 and for valid significance tests, p504.

C. Interpretation of confidence intervals for the difference between two means, chapter 19, or the difference between two proportions, chapter 21.

D. Principles of quality control chart for the sample proportion.

Three rules to determine if process is in control.

E. Chi Square test, CH23, principles, degrees of freedom, determination of P Value.

F. ANOVA test, CH25, principles, null and alternate hypothesis.

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