 18.1: Margin of error A TV newscaster reports the results of a poll of vo...
 18.2: Margin of error A medical researcher estimates the percentage of ch...
 18.3: Conditions For each situation described below, identify the populat...
 18.4: More conditions Consider each situation described. Identify the pop...
 18.5: Conclusions A catalog sales company promises to deliver orders plac...
 18.6: More conclusions In January 2002, two students made worldwide headl...
 18.7: Confidence intervals Several factors are involved in the creation o...
 18.8: Confidence intervals, again Several factors are involved in the cre...
 18.9: Cars What fraction of cars is made in Japan? The computer output be...
 18.10: Parole A study of 902 decisions made by the Nebraska Board of Parol...
 18.11: Mislabeled seafood In December 2011, Consumer Reports published the...
 18.12: Mislabeled seafood, second course The December 2011 Consumer Report...
 18.13: Baseball fans In a national poll taken in February 2008, Gallup ask...
 18.14: Lying about age Pew Research, in November 2011, polled a random sam...
 18.15: Contributions, please The Paralyzed Veterans of America is a philan...
 18.16: Take the offer First USA, a major credit card company, is planning ...
 18.17: Teenage drivers An insurance company checks police records on 582 a...
 18.18: Junk mail Direct mail advertisers send solicitations (a.k.a. junk m...
 18.19: Safe food Some food retailers propose subjecting food to a low leve...
 18.20: Local news The mayor of a small city has suggested that the state l...
 18.21: Death penalty, again In the survey on the death penalty you read ab...
 18.22: Gambling A city ballot includes a local initiative that would legal...
 18.23: Rickets Vitamin D, whether ingested as a dietary supplement or prod...
 18.24: Teachers A 2011 Gallup poll found that 76% of Americans believe tha...
 18.25: Payments In a May 2007 Experian/Gallup Personal Credit Index poll o...
 18.26: Back to campus In 2004 ACT, Inc., reported that 74% of 1644 randoml...
 18.27: Deer ticks Wildlife biologists inspect 153 deer taken by hunters an...
 18.28: Back to campus again Suppose ACT, Inc. wants to update their inform...
 18.29: Graduation Its believed that as many as 25% of adults over 50 never...
 18.30: Hiring In preparing a report on the economy, we need to estimate th...
 18.31: Graduation, again As in Exercise 29, we hope to estimate the percen...
 18.32: Better hiring info Editors of the business report in Exercise 30 ar...
 18.33: Pilot study A states environmental agency worries that many cars ma...
 18.34: Another pilot study During routine screening, a doctor notices that...
 18.35: Approval rating A newspaper reports that the governors approval rat...
 18.36: Amendment A TV news reporter says that a proposed constitutional am...
Solutions for Chapter 18: Confidence Intervals for Proportions
Full solutions for Stats Modeling the World  4th Edition
ISBN: 9780321854018
Solutions for Chapter 18: Confidence Intervals for Proportions
Get Full SolutionsChapter 18: Confidence Intervals for Proportions includes 36 full stepbystep solutions. Since 36 problems in chapter 18: Confidence Intervals for Proportions have been answered, more than 19748 students have viewed full stepbystep solutions from this chapter. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. This expansive textbook survival guide covers the following chapters and their solutions.

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

aerror (or arisk)
In hypothesis testing, an error incurred by failing to reject a null hypothesis when it is actually false (also called a type II error).

Adjusted R 2
A variation of the R 2 statistic that compensates for the number of parameters in a regression model. Essentially, the adjustment is a penalty for increasing the number of parameters in the model. Alias. In a fractional factorial experiment when certain factor effects cannot be estimated uniquely, they are said to be aliased.

Bivariate distribution
The joint probability distribution of two random variables.

Categorical data
Data consisting of counts or observations that can be classiied into categories. The categories may be descriptive.

Center line
A horizontal line on a control chart at the value that estimates the mean of the statistic plotted on the chart. See Control chart.

Comparative experiment
An experiment in which the treatments (experimental conditions) that are to be studied are included in the experiment. The data from the experiment are used to evaluate the treatments.

Continuous distribution
A probability distribution for a continuous random variable.

Counting techniques
Formulas used to determine the number of elements in sample spaces and events.

Critical value(s)
The value of a statistic corresponding to a stated signiicance level as determined from the sampling distribution. For example, if PZ z PZ ( )( .) . ? =? = 0 025 . 1 96 0 025, then z0 025 . = 1 9. 6 is the critical value of z at the 0.025 level of signiicance. Crossed factors. Another name for factors that are arranged in a factorial experiment.

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

Demingâ€™s 14 points.
A management philosophy promoted by W. Edwards Deming that emphasizes the importance of change and quality

Discrete random variable
A random variable with a inite (or countably ininite) range.

Distribution function
Another name for a cumulative distribution function.

Error mean square
The error sum of squares divided by its number of degrees of freedom.

Error of estimation
The difference between an estimated value and the true value.

Error propagation
An analysis of how the variance of the random variable that represents that output of a system depends on the variances of the inputs. A formula exists when the output is a linear function of the inputs and the formula is simpliied if the inputs are assumed to be independent.

Exhaustive
A property of a collection of events that indicates that their union equals the sample space.

Extra sum of squares method
A method used in regression analysis to conduct a hypothesis test for the additional contribution of one or more variables to a model.

False alarm
A signal from a control chart when no assignable causes are present