 5.1E: Stats test, part III The mean score on the Stats exam was 75 points...
 5.1RE: Bananas Here are the prices (in cents per pound) of bananas reporte...
 5.2E: Cold U? A high school senior uses the Internet to get information o...
 5.2RE: Herbal medicine Researchers for the Herbal Medicine Council collect...
 5.3E: Stats test, Part II Suppose your Statistics professor reports test ...
 5.3RE: Singers by parts The boxplots shown display the heights (in inches)...
 5.4E: Placement exams An incoming freshman took her college’s placement e...
 5.4RE: Rivets A company that manufactures rivets believes the shear streng...
 5.5E: Shipments A company selling clothing on the Internet reports that t...
 5.5RE: Beanstalks Beanstalk Clubs are social clubs for very tall people. T...
 5.6E: Bananas Here are the prices (in cents per pound) of bananas reporte...
 5.6RE: Bread Clarksburg Bakery is trying to predict how many loaves to bak...
 5.7E: Guzzlers? Environmental Protection Agency (EPA) fuel economy estima...
 5.7RE: Engines, again Horsepower is another measure commonly used to descr...
 5.8E: Placement exams An incoming freshman took her college’s placement e...
 5.8RE: Car speeds, the picture For the car speed data of Exercise, here is...
 5.9E: ?Winter Olympics 2010 speed skating The top 36 women’s 500m speed ...
 5.9RE: Fraud detection A credit card bank is investigating the incidence o...
 5.10E: Car speeds again For the car speed data of Exercise, recall that th...
 5.10RE: Streams As part of the course work, a class at an upstate NY colleg...
 5.11E: Music library Corey has 4929 songs in his computer’s music library....
 5.11RE: Cramming One Thursday, researchers gave students enrolled in a sect...
 5.12E: Wisconsin ACT math The histogram shows the distribution of mean ACT...
 5.12RE: eBooks A study by the Pew Internet&American Life Project found tha...
 5.13E: Prenatal care Results of a 1996 American Medical Association report...
 5.13RE: Let’s play cards You pick a card from a deck (see description in Ch...
 5.14E: Hams A specialty foods company sells “gourmet hams” by mail order. ...
 5.14RE: Accidents Progressive Insurance asked customers who had been involv...
 5.15E: SAT or ACT? Each year thousands of high school students take either...
 5.15RE: Profits Here is a stemandleaf display showing profits as a percen...
 5.16E: Singers The boxplots shown display the heights (in inches) of 130 m...
 5.16RE: Hard water II The data set from England and Wales also notes for ea...
 5.17E: Dialysis In a study of dialysis, researchers found that “of the thr...
 5.17RE: Seasons Average daily temperatures in January and July for 60 large...
 5.18E: Checkup One of the authors has an adopted grandson whose birth fami...
 5.18RE: Old Faithful It is a common belief that Yellowstone’s most famous g...
 5.19E: Music library again Corey has 4929 songs in his computer’s music li...
 5.19RE: Old Faithful? Does the duration of an eruption have an effect on th...
 5.20E: Windy In the last chapter, we looked at three outliers arising from...
 5.20RE: Teen drivers 2013 The National Highway Traffic Safety Administratio...
 5.21E: Acid rain Based on longterm investigation, researchers have sugges...
 5.21RE: Liberty’s nose Is the Statue of Liberty’s nose too long? Her nose m...
 5.22E: Checkup One of the authors has an adopted grandson whose birth fami...
 5.22RE: Winter Olympics 2010 speed skating The top 36 women’s 500m speed s...
 5.23E: Final exams Anna, a language major, took final exams in both French...
 5.23RE: Normal cattle Using N(1152, 84), the Normal model for weights of An...
 5.24E: Fraud detection A credit card bank is investigating the incidence o...
 5.24RE: Sluggers Babe Ruth was the first great “slugger” in baseball. His r...
 5.25E: Streams As part of the course work, a class at an upstate NY colleg...
 5.25RE: More cattle Based on the model N(1152, 84) describing Angus steer w...
 5.26E: Car speeds John Beale of Stanford, California, recorded the speeds ...
 5.26RE: More IQs In the Normal model N(100, 16), what cutoff value boundsa)...
 5.27E: More cattle Recall that the beef cattle described in Exercise 25 ha...
 5.27RE: Cattle, finis Consider the Angus weights model N(1152, 84) one last...
 5.28E: Cramming One Thursday, researchers gave students enrolled in a sect...
 5.28RE: IQ, finis Consider the IQ model N(100, 16) one last time.a) What IQ...
 5.29E: Cattle, part III Suppose the auctioneer in Exercise 27 sold a herd ...
 5.29RE: Cholesterol Assume the cholesterol levels of adult American women c...
 5.30E: Mensa People with zscores above 2.5 on an IQ test are sometimes cl...
 5.30RE: Birth order revisited Consider again the data on birth order and co...
 5.31E: Temperatures A town’s January high temperatures average 36°F with a...
 5.31RE: Engines One measure of the size of an automobile engine is its “dis...
 5.32E: Let’s play cards You pick a card from a deck (see description in Ch...
 5.32RE: Body temperatures Most people think that the “normal” adult body te...
 5.33E: Combining test scores The first Stats exam had a mean of 65 and a s...
 5.33RE: Age and party 2011 The Pew Research Center conducts surveys regular...
 5.34E: Hard water In an investigation of environmental causes of disease, ...
 5.34RE: Pay According to the Bureau of Labor Statistics, the mean hourly wa...
 5.35E: Final exams Anna, a language major, took final exams in both French...
 5.35RE: Age and party 2011 II Consider again the Pew Research Center result...
 5.36E: Combining scores again The first Stat exam had a mean of 80 and a s...
 5.36RE: Bike safety 2012 The Bicycle Helmet Safety Institute website includ...
 5.37E: Old Faithful It is a common belief that Yellowstone’s most famous g...
 5.37RE: Some assembly required A company that markets buildityourself fur...
 5.38E: Seasons Average daily temperatures in January and July for 60 large...
 5.38RE: Profits Here is a stemandleaf display showing profits as a percen...
 5.39E: Winter Olympics 2010 downhill Fiftynine men completed the men’s al...
 5.40E: MP3s Two companies market new batteries targeted at owners of perso...
 5.41E: Receivers 2013 NFL data from the 2013 football season reported the ...
 5.42E: Old Faithful? Does the duration of an eruption have an effect on th...
 5.43E: Cattle, part III Suppose the auctioneer in Exercise sold a herd of ...
 5.44E: Sample A study in South Africa focusing on the impact of health ins...
 5.45E: Cattle, finis Consider the Angus weights model N(1152, 84) one last...
 5.46E: Caught speeding Suppose police set up radar surveillance on the Sta...
 5.47E: Music and memory Is it a good idea to listen to music when studying...
 5.48E: Rock concerts A popular band on tour played a series of concerts in...
 5.49E: Guzzlers? Environmental Protection Agency (EPA) fuel economy estima...
 5.50E: Mail Here are the number of pieces of mail received at a school off...
 5.51E: Birth order revisited Consider again the data on birth order and co...
 5.52E: High IQ Exercise proposes modeling IQ scores with N(100, 16). What ...
Solutions for Chapter 5: Stats: Data and Models 4th Edition
Full solutions for Stats: Data and Models  4th Edition
ISBN: 9780321986498
Solutions for Chapter 5
Get Full SolutionsSince 90 problems in chapter 5 have been answered, more than 68220 students have viewed full stepbystep solutions from this chapter. This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: Stats: Data and Models , edition: 4. Chapter 5 includes 90 full stepbystep solutions. Stats: Data and Models was written by and is associated to the ISBN: 9780321986498.

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

Bias
An effect that systematically distorts a statistical result or estimate, preventing it from representing the true quantity of interest.

Binomial random variable
A discrete random variable that equals the number of successes in a ixed number of Bernoulli trials.

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

Combination.
A subset selected without replacement from a set used to determine the number of outcomes in events and sample spaces.

Conditional probability
The probability of an event given that the random experiment produces an outcome in another event.

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

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

Conidence interval
If it is possible to write a probability statement of the form PL U ( ) ? ? ? ? = ?1 where L and U are functions of only the sample data and ? is a parameter, then the interval between L and U is called a conidence interval (or a 100 1( )% ? ? conidence interval). The interpretation is that a statement that the parameter ? lies in this interval will be true 100 1( )% ? ? of the times that such a statement is made

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.

Deming
W. Edwards Deming (1900–1993) was a leader in the use of statistical quality control.

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.

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.

F distribution.
The distribution of the random variable deined as the ratio of two independent chisquare random variables, each divided by its number of degrees of freedom.

Finite population correction factor
A term in the formula for the variance of a hypergeometric random variable.

Generator
Effects in a fractional factorial experiment that are used to construct the experimental tests used in the experiment. The generators also deine the aliases.

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 .