 19.1: 1. Margin of error. A TV newscaster reports the results of a poll o...
 19.2: 2. Margin of error. A medical researcher estimates the percentage o...
 19.3: 3. Conditions. For each situation described below, identifythe popu...
 19.4: 4. More conditions. Consider each situation described.Identify the ...
 19.5: 5. Conclusions. A catalog sales company promises todeliver orders p...
 19.6: 6. More conclusions. In January 2002, two studentsmade worldwide he...
 19.7: 7. Confidence intervals. Several factors are involved inthe creatio...
 19.8: 8. Confidence intervals, again. Several factors are involvedin the ...
 19.9: 9. Cars. What fraction of cars is made in Japan? Thecomputer output...
 19.10: 10. Parole. A study of 902 decisions made by the NebraskaBoard of P...
 19.11: 11. Contaminated chicken. In January 2007 ConsumerReports published...
 19.12: 12. Contaminated chicken, second course. The January2007 Consumer R...
 19.13: 13. Baseball fans. In a poll taken in March of 2007, Gallupasked 10...
 19.14: 14. Cloning 2007. A May 2007 Gallup Poll found that only11% of a ra...
 19.15: 15. Contributions, please. The Paralyzed Veterans ofAmerica is a ph...
 19.16: 16. Take the offer. First USA, a major credit card company,is plann...
 19.17: 17. Teenage drivers. An insurance company checks policerecords on 5...
 19.18: 18. Junk mail. Direct mail advertisers send solicitations(a.k.a. ju...
 19.19: 19. Safe food. Some food retailers propose subjecting foodto a low ...
 19.20: 20. Local news. The mayor of a small city has suggestedthat the sta...
 19.21: 21. Death penalty, again. In the survey on the deathpenalty you rea...
 19.22: 22. Gambling. Acity ballot includes a local initiative thatwould le...
 19.23: 23. Rickets. Vitamin D, whether ingested as a dietary supplementor ...
 19.24: 24. Pregnancy. In 1998 a San Diego reproductive clinic reported49 l...
 19.25: 25. Payments. In a May 2007 Experian/Gallup PersonalCredit Index po...
 19.26: 26. Back to campus again. In 2004 ACT, Inc., reported that74% of 16...
 19.27: 27. Deer ticks. Wildlife biologists inspect 153 deer takenby hunter...
 19.28: 28. Pregnancy, II. The San Diego reproductive clinic inExercise 24 ...
 19.29: 29. Graduation. Its believed that as many as 25% of adultsover 50 n...
 19.30: 30. Hiring. In preparing a report on the economy, we needto estimat...
 19.31: 31. Graduation, again. As in Exercise 29, we hope to estimate the p...
 19.32: 32. Better hiring info. Editors of the business report in Exercise ...
 19.33: 33. Pilot study. A state's environmental agency worries that many c...
 19.34: 34. Another pilot study. During routine screening, a doctor notices...
 19.35: 35. Approval rating. A newspaper reports that the governor's approv...
 19.36: 36. Amendment. A TV news reporter says that a proposed constitution...
Solutions for Chapter 19: Confidence Intervals for Proportions
Full solutions for Stats: Modeling The World  3rd Edition
ISBN: 9780131359581
Solutions for Chapter 19: Confidence Intervals for Proportions
Get Full SolutionsChapter 19: Confidence Intervals for Proportions includes 36 full stepbystep solutions. This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: Stats: Modeling The World , edition: 3. Stats: Modeling The World was written by and is associated to the ISBN: 9780131359581. Since 36 problems in chapter 19: Confidence Intervals for Proportions have been answered, more than 40550 students have viewed full stepbystep solutions from this chapter.

2 k p  factorial experiment
A fractional factorial experiment with k factors tested in a 2 ? p fraction with all factors tested at only two levels (settings) each

Causal variable
When y fx = ( ) and y is considered to be caused by x, x is sometimes called a causal variable

Causeandeffect diagram
A chart used to organize the various potential causes of a problem. Also called a ishbone diagram.

Central composite design (CCD)
A secondorder response surface design in k variables consisting of a twolevel factorial, 2k axial runs, and one or more center points. The twolevel factorial portion of a CCD can be a fractional factorial design when k is large. The CCD is the most widely used design for itting a secondorder model.

Chisquare test
Any test of signiicance based on the chisquare distribution. The most common chisquare tests are (1) testing hypotheses about the variance or standard deviation of a normal distribution and (2) testing goodness of it of a theoretical distribution to sample data

Conidence coeficient
The probability 1?a associated with a conidence interval expressing the probability that the stated interval will contain the true parameter value.

Contrast
A linear function of treatment means with coeficients that total zero. A contrast is a summary of treatment means that is of interest in an experiment.

Correlation
In the most general usage, a measure of the interdependence among data. The concept may include more than two variables. The term is most commonly used in a narrow sense to express the relationship between quantitative variables or ranks.

Correlation coeficient
A dimensionless measure of the linear association between two variables, usually lying in the interval from ?1 to +1, with zero indicating the absence of correlation (but not necessarily the independence of the two variables).

Correlation matrix
A square matrix that contains the correlations among a set of random variables, say, XX X 1 2 k , ,…, . The main diagonal elements of the matrix are unity and the offdiagonal elements rij are the correlations between Xi and Xj .

Cumulative normal distribution function
The cumulative distribution of the standard normal distribution, often denoted as ?( ) x and tabulated in Appendix Table II.

Cumulative sum control chart (CUSUM)
A control chart in which the point plotted at time t is the sum of the measured deviations from target for all statistics up to time t

Defect
Used in statistical quality control, a defect is a particular type of nonconformance to speciications or requirements. Sometimes defects are classiied into types, such as appearance defects and functional defects.

Discrete uniform random variable
A discrete random variable with a inite range and constant probability mass function.

Erlang random variable
A continuous random variable that is the sum of a ixed number of independent, exponential random variables.

Factorial experiment
A type of experimental design in which every level of one factor is tested in combination with every level of another factor. In general, in a factorial experiment, all possible combinations of factor levels are tested.

Firstorder model
A model that contains only irstorder terms. For example, the irstorder response surface model in two variables is y xx = + ?? ? ? 0 11 2 2 + + . A irstorder model is also called a main effects model

Forward selection
A method of variable selection in regression, where variables are inserted one at a time into the model until no other variables that contribute signiicantly to the model can be found.

Fraction defective control chart
See P chart

Gamma random variable
A random variable that generalizes an Erlang random variable to noninteger values of the parameter r