MATH 1680: Review for Exam 3.
Fall 2006
The exam will cover Chapters 18, 19, 20, 21, 23, and 26 in the book.
The exam will consist of at most 10 problems (some might have multiple parts) and there will be
at most two problems from each chapter.
The exam problems will be in the same spirit as the homework problems, but slightly more emphasis
will be placed on computation. Using the correct method or formula for a computation is worth
more than half the credit for a problem.
•Chapter 18: The Normal Approximation for Probability Histograms Some impor-
tant concepts are:
–“Probability histograms represent chance by area.”
–When to use the normal curve, how to use the normal curve.
•Chapter 19: Sample Surveys Some important concepts are:
–Simple random sample – population, statistic, parameter.
–Chance error and bias.
•Chapter 20: Chance Errors in Sampling Some important concepts are:
–Expected value and standard error for a sample percentage.
–The correction factor when the sample size is large compared to the population size.
•Chapter 21: The accuracy of Percentages Some important concepts are:
–Bootstrap method for samples when there is a 0-1 box model.
–Confidence intervals.
•Chapter 23: The Accuracy of Averages Some important concepts are:
–Expected value and standard error for averages.
–Expected value and standard error for sample averages.
•Chapter 26: Tests of Significance Some important concepts are:
–Null hypothesis, alternative hypothesis.
–The “ztest statistic.”
