 4.8.1E: Pregnancy Test Results. Refer to the results summarized in the tabl...
 4.8.2E: Pregnancy Test Results. Refer to the results summarized in the tabl...
 4.8.3E: Survey Results In Orange County, 51% of the adults are males. One a...
 4.8.4E: Emergency Locator Transmitters An aircraft emergency locator transm...
 4.8.5E: Emergency Locator Transmitters Use the same ELT data from Exercise....
 4.8.6E: Emergency Locator Transmitters Use the same ELT data from Exercise....
 4.8.7E: Pleas and Sentences In a study of pleas and prison sentences, it is...
 4.8.8E: Pleas and Sentences Use the same data given in Exercise.a. If one o...
 4.8.9E: HIV The New York State Health Department reports a 10% rate of infe...
 4.8.10E: HIV Use the same data from Exercise. If someone is randomly selecte...
 4.8.11RE: ?Red Cars Use subjective probability to estimate the probability of...
 4.8.13E: Biased Coin In an article about confusion of eyewitnesses, John All...
 4.8.13RE: ?National Statistics Daya. If a person is randomly selected, find t...
 4.8.1CQQ: A multiplechoice question on a statistics quiz has possible correc...
 4.8.1CRE: 1CRE: Oscar Winners  Listed below are the differences (in years) b...
 4.8.1RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.2CQQ: As the author is creating this exercise, a weather reporter stated ...
 4.8.2CRE: Unusual/Unlikely Eventsa. The mean pulse rate for adult women is 77...
 4.8.2RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.3CQQ: If a day of the week is randomly selected, what is the probability ...
 4.8.3CRE: Organ Donors USA Today provided information about a survey of 5100 ...
 4.8.3RE: 3RE: Prison and Plea. Use the data in the accompanying table (based...
 4.8.4CQQ: Based on a Harris poll, 20% of adults smoke. If two adults are rand...
 4.8.4CRE: ?Driving Survey In a survey of Americans age 16 years or older, res...
 4.8.4RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.5CQQ: Estimate the probability that a randomly selected primetime televi...
 4.8.5CRE: Sampling Eye Color Based on a study by Dr. P. Sorita Soni at Indian...
 4.8.5RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.6CQQ: ?In Exercises 610, use the following results from the 839 player c...
 4.8.6CRE: ?Scatterplot of Bear Chest Sizes and Weights. Given below are the c...
 4.8.6RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.7CQQ: ?In Exercises 610, use the following results from the 839 player c...
 4.8.7CRE: Vermont Hot Lotto Winning the jackpot in the Vermont Hot Lotto game...
 4.8.7RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.8CQQ: ?In Exercises 610, use the following results from the 839 player c...
 4.8.8RE: ?Prison and Plea. In Exercises 110, use the data in the accompanyi...
 4.8.9CQQ: ?In Exercises 6–10, use the following results from the 839 player c...
 4.8.9RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.10CQQ: ?In Exercises 6–10, use the following results from the 839 player c...
 4.8.10RE: ?Prison and Plea. In Exercises 1–10, use the data in the accompanyi...
 4.8.11E: Extending Bayes' Theorem Example in this section included an extens...
 4.8.12E: Extensions of Bayes' Theorem In Example 1, we used only the initial...
 4.8.12RE: ?Blue Eyes About 35% of the population has blue eyes (based on a st...
 4.8.14RE: ?Composite Sampling for STDs Currently, the rate for sexually trans...
 4.8.16RE: ?Georgia Fantasy 5 In the Georgia Fantasy 5 lottery, winning the to...
 4.8.17RE: ?Numbers Game Before the proliferation of legal lotteries, illegal ...
 4.8.18RE: ?Trifecta In horse racing, a trifecta is a bet that the first three...
Solutions for Chapter 4.8: Elementary Statistics 12th Edition
Full solutions for Elementary Statistics  12th Edition
ISBN: 9780321836960
Solutions for Chapter 4.8
Get Full SolutionsSince 47 problems in chapter 4.8 have been answered, more than 382154 students have viewed full stepbystep solutions from this chapter. Elementary Statistics was written by and is associated to the ISBN: 9780321836960. This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. This expansive textbook survival guide covers the following chapters and their solutions. Chapter 4.8 includes 47 full stepbystep solutions.

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).

Arithmetic mean
The arithmetic mean of a set of numbers x1 , x2 ,…, xn is their sum divided by the number of observations, or ( / )1 1 n xi t n ? = . The arithmetic mean is usually denoted by x , and is often called the average

Bayes’ theorem
An equation for a conditional probability such as PA B (  ) in terms of the reverse conditional probability PB A (  ).

Bivariate normal distribution
The joint distribution of two normal random variables

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

Chisquare (or chisquared) random variable
A continuous random variable that results from the sum of squares of independent standard normal random variables. It is a special case of a gamma random variable.

Components of variance
The individual components of the total variance that are attributable to speciic sources. This usually refers to the individual variance components arising from a random or mixed model analysis of variance.

Conditional probability mass function
The probability mass function of the conditional probability distribution of a discrete random variable.

Contour plot
A twodimensional graphic used for a bivariate probability density function that displays curves for which the probability density function is constant.

Convolution
A method to derive the probability density function of the sum of two independent random variables from an integral (or sum) of probability density (or mass) functions.

Cook’s distance
In regression, Cook’s distance is a measure of the inluence of each individual observation on the estimates of the regression model parameters. It expresses the distance that the vector of model parameter estimates with the ith observation removed lies from the vector of model parameter estimates based on all observations. Large values of Cook’s distance indicate that the observation is inluential.

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

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

Distribution function
Another name for a cumulative distribution function.

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.

Experiment
A series of tests in which changes are made to the system under study

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

Fractional factorial experiment
A type of factorial experiment in which not all possible treatment combinations are run. This is usually done to reduce the size of an experiment with several factors.

Gamma function
A function used in the probability density function of a gamma random variable that can be considered to extend factorials