 8.2.27: For Exercises 27 to 30, check whether each of the conditions is met...
 8.2.28: For Exercises 27 to 30, check whether each of the conditions is met...
 8.2.29: For Exercises 27 to 30, check whether each of the conditions is met...
 8.2.30: For Exercises 27 to 30, check whether each of the conditions is met...
 8.2.31: 98% confidence Find z* for a 98% confidence interval using Table A ...
 8.2.32: 93% confidence Find z* for a 93% confidence interval using Table A ...
 8.2.33: Going to the prom Tonya wants to estimate what proportion of her sc...
 8.2.34: Reporting cheating What proportion of students are willing to repor...
 8.2.35: Binge drinking In a recent National Survey of Drug Use and Health, ...
 8.2.36: Teens texting A Pew Internet and American Life Project survey found...
 8.2.37: Binge drinking Describe a possible source of error that is not incl...
 8.2.38: Teens texting Describe a possible source of error that is not inclu...
 8.2.39: How common is SAT coaching? A random sample of students who took th...
 8.2.40: 2010 begins In January 2010 a Gallup Poll asked a random sample of ...
 8.2.41: Equality for women? Have efforts to promote equality for women gone...
 8.2.42: A TV poll A television news program conducts a callin poll about a...
 8.2.43: Can you taste PTC? PTC is a substance that has a strong bitter tast...
 8.2.44: School vouchers A national opinion poll found that 44% of all Ameri...
 8.2.45: Election polling Gloria Chavez and Ronald Flynn are the candidates ...
 8.2.46: Starting a nightclub A college student organization wants to start ...
 8.2.47: Teens and their TV sets According to a Gallup Poll report, 64% of t...
 8.2.48: Gambling and the NCAA Gambling is an issue of great concern to thos...
 8.2.49: Multiple choice: Select the best answer for Exercises 49 to 52. A G...
 8.2.50: Multiple choice: Select the best answer for Exercises 49 to 52. Mos...
 8.2.51: Multiple choice: Select the best answer for Exercises 49 to 52. You...
 8.2.52: Multiple choice: Select the best answer for Exercises 49 to 52. A n...
 8.2.53: Exercises 53 and 54 refer to the following setting. The following t...
 8.2.54: Exercises 53 and 54 refer to the following setting. The following t...
Solutions for Chapter 8.2: Estimating a Population Proportion
Full solutions for The Practice of Statistics  5th Edition
ISBN: 9781464108730
Solutions for Chapter 8.2: Estimating a Population Proportion
Get Full SolutionsThe Practice of Statistics was written by and is associated to the ISBN: 9781464108730. This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: The Practice of Statistics, edition: 5. Since 28 problems in chapter 8.2: Estimating a Population Proportion have been answered, more than 35454 students have viewed full stepbystep solutions from this chapter. Chapter 8.2: Estimating a Population Proportion includes 28 full stepbystep solutions.

Axioms of probability
A set of rules that probabilities deined on a sample space must follow. See Probability

Block
In experimental design, a group of experimental units or material that is relatively homogeneous. The purpose of dividing experimental units into blocks is to produce an experimental design wherein variability within blocks is smaller than variability between blocks. This allows the factors of interest to be compared in an environment that has less variability than in an unblocked experiment.

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

Conditional mean
The mean of the conditional probability distribution of a random variable.

Conditional probability density function
The probability density function of the conditional probability distribution of a continuous random variable.

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

Continuity correction.
A correction factor used to improve the approximation to binomial probabilities from a normal distribution.

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).

Covariance
A measure of association between two random variables obtained as the expected value of the product of the two random variables around their means; that is, Cov(X Y, ) [( )( )] =? ? E X Y ? ? X Y .

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.

Curvilinear regression
An expression sometimes used for nonlinear regression models or polynomial regression models.

Degrees of freedom.
The number of independent comparisons that can be made among the elements of a sample. The term is analogous to the number of degrees of freedom for an object in a dynamic system, which is the number of independent coordinates required to determine the motion of the object.

Deining relation
A subset of effects in a fractional factorial design that deine the aliases in the design.

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

Enumerative study
A study in which a sample from a population is used to make inference to the population. See Analytic study

Estimate (or point estimate)
The numerical value of a point estimator.

Event
A subset of a 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.

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

Hat matrix.
In multiple regression, the matrix H XXX X = ( ) ? ? 1 . This a projection matrix that maps the vector of observed response values into a vector of itted values by yˆ = = X X X X y Hy ( ) ? ? ?1 .