STUDY TIPS 

The Assigned Problems require Excel Companion sections, in order to help you solve the problems in the most efficient manner on the computer. The computer will be used on the job in “real life” situations. By contrast, solving them with the hand calculator (Texas Instruments TI-30Xa) in class teaches you the theory underlying the computer calculations. Both methods are necessary – they approach the problem solutions from different perspectives. You need both skills. You will need a hand calculator for all classes (starting with the first class) and for all Exams.

Problems turned with answers only will not be accepted for credit – full derivations must be shown for each problem.

Statistics for Managers 5^th Edition

PREPARATION FOR FIRST EXAM

· Tutorial for EXCEL 2007 - http://www.vertex42.com/Excel2007/excel-tutorial.htm

· Recommended calculator: Texas Instruments TI-30Xa

· Student resources from the author are found on www.prenhall.com/levine     Resources include - sample exams, powerpoint slides, notes, etc.At the end of each section in the text is a "Learning the Basics" set of problems for the material just presented.  Mastery of these sections will insure a better grade on the exams.

· Study EXCEL PRIMER on pp. 18 – 30.

· Follow through “Excel Companion” pp. 75 - 93

· Sections 3-1 and 3-4 are important for exam - definitions, uses

· Use PHStat2 for Box and Whisker plots, five number summary See p. 144 & pp. 124-125

· Know how to calculate the five number summary from an array

· Text Section 5-3 Binomial and 5-4 Poisson, especially Problems 5.18-5.20   and Problems 5.30-5.32 .

· Chapter 6, very important for exam.

· Know especially the “Learning the Basics” p. 233, Problems 6.1 -6.6

For sample exams go to  www/prenhall.com/Levine

Approximate composition of the First Exam – 1/3 Theory questions relating to definitions and concepts; 1/2 Chapter 6-type problems; 1/6 Binomial, Poisson, etc. Total questions – about 50. “Open Book” All questions will be solved using a hand calculator – computers will not be used during any exam.

Exam Review the Saturday morning before each exam, usually from 8:30AM – 12 Noon. Absolutely NOT compulsory.

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PREPARATION FOR SECOND EXAM

TESTING STATISTICAL HYPOTHESES AND OTHER TOPICS 

SECOND EXAM REVIEW - Recommended calculator: Texas Instruments TI-30Xa

Students are responsible for all materials within chapters 8 – 11. The following items should receive special emphasis.

CHAPTERS 8 - 11 Levine, et al., 5^th Edition

• Confidence Intervals using t and z.  Know when to use each. Know when not to use each. Extremely important for 1st Exam.

· Chapter 8, especially Sections 8.1 – 8.4 are important for the exam.

· Work through the problems in the “Learning the Basics” sections for each of the Sections 8.1-8.4

• Student-t distribution Section 8.2 pp. 290 – 295 Know the t-test and the Confidence Intervals
• Confidence Interval for variable data - Sections 8.1 – 8.2, pp. 285 - 295
• Confidence Interval  for proportion data - Section 8.3, pp. 296 - 298
• Sample size determination  for variable data p. 300
• Sample size determination  for proportion data   pp. 302-303

CHAPTER 9

• Null Hypothesis and Alternative pp.328 - 333 & Table 9.1 p. 332

• Z-test — Sigma Known p. 334ff

• P-value pp. 337—340 and p. 349

• One-tailed Test pp. 343 —345

• t-test Sigma Unknown pp. 346 — 349

• Z-test for Proportions pp. 353 — 356

•

CHAPTER 10

• Z-test and t-test for Difference between Means pp. 370 — 376

• Confidence Interval for Difference Between Means pp. 376-377

• Two Related Means p. 381 — 387

• Confidence Interval for Difference between Proportions pp. 390-395

• F-test for Two Variances pp. 397-403

•

CHAPTER 11

• Analysis of Variance pp. 422—436 Especially Table 11.1 p. 426

· Also the Tukey-Kramer Procedure p. 429 ff

•

Exam Review Session – Saturday, Room 121 (barring unforeseen contingencies)

Final word of CAUTION  -  Be able to match up a given Alternative Hypothesis with its Null Hypothesis.    Review thoroughly how many degrees of freedom df  go with each Significance Test or Confidence Interval.

ANOVA Worksheet: Click on ANOVAWorksheet.pdf

For other excellent materials see www/prenhall.com/Levine

FINAL EXAM REVIEW

Most of the exam (almost half) will be on regression, then time series, index numbers, and causes and sources of variation.

B5760 FINAL EXAM REVIEW NOTES

CHAPTER 12

• Chi Square pp. 462 — 481, Especially p. 463- 466  Know how to fill out a Chi Square table as worked out in the example in the tables on p. 466.  Know how to calculate the appropriate degrees of freedom for a Contingency Table. 

The Chi Square theory on p. 468 is very important for the theory questions.

• Wilcoxin Rank Sum test pp. 486 — 490 Know how to find the Critical Values for the statistical test.

• Kruskal — Wallis Rank test pp. 493 – 496   Know how to find the Critical Values for the statistical test.

SIMPLE LINEAR REGRESSION

• Regression Equation and definitions p. 512-521
• Regression Output – 3-part table p. 516 Figure 13.4 Know every part of it.  Know all the tests in that table.
• Interpreting coefficients pp. 514-520
• Regression Variation pp. 524-525 Know how to combine the Sums of Squares and their meanings.
• Cofficient of Determination p. 526-527  Good definitions.
• Std. Error of Estimate p. 528  Know what it is and how it is used.
• Regression Assumptions Section 13.4
• Residual Analysis and Durbin-Watson Section 13.6 Especially p. 536-37.  Decision rules on p. 537.  You'll have to calculate the critical values for the Durbin-Watson and use the decision rules to determine significance of a coefficient,  as in the example.
• Statistical Significance Tests Section 13.7
• Checking Your Understanding p. 556 Answer 13.64-13.72 for theory questions.
• Table 13.6 on p. 541 gives some great info on the df, SS, etc.  Use this table in conjunction with Table 13.4 on p. 516.

MULTIPLE REGRRESSION (Just skim for concepts)

• Just scan Chapter 14 for concepts – no problem solving
• Compare Figure 13.4 p. 516 with Figures 14.10 & 14.11 pp. 595-596
• How many statistical tests are there in each table? Write out the test and test results for each test.
• Learning the Basics p. 599

TIME SERIES AND FORECASTING

• Table 16.1 Time Series Components p. 648 Gives a wealth of theory answers.
• Equations 16.1 & 16.2 p. 648 Annual and Non-Annual Models Check the difference between the two models.  Which one has the Seasonal component in it?  Why?
• Moving Averages Section 16.3 Know particularly pp. 650 - 652. MA as smoothing technique.

INDEX NUMBERS

• Definitions Section 16.8 Know this whole section well for theory as well as how to construct the indexes.  Carefully take notes in class regarding the manner in which these indexes are constructed.  The text recaps the formulas on p. 697.
• Unweighted Indices pp. 689-690
• Laspeyres p. 691
• Paasche p. 692
• Learning The Basics p. 693

CONTROL CHARTS -

• Know the theory and definitions in Sections 18.1 – 18.4
• Six-Sigma Management
• Causes of Variation
• Process Control

For other excellent materials see www/prenhall.com/levine

© Copyright 2008. Dr. Donald L. Westerfield. All rights reserved.