 102.1: What two things should be done before one performs a regression ana...
 102.2: What are the assumptions for regression analysis?
 102.3: What is the general form for the regression line used in statistics...
 102.4: What is the symbol for the slope? For the y intercept? b, a
 102.5: What is meant by the line of best fit?
 102.6: When all the points fall on the regression line, what is the value ...
 102.7: What is the relationship between the sign of the correlation coeffi...
 102.8: As the value of the correlation coefficient increases from 0 to 1, ...
 102.9: How is the value of the correlation coefficient related to the accu...
 102.10: If the value of r is not significant, what can be said about the re...
 102.11: When the value of r is not significant, what value should be used t...
 102.12: Gas Tax and Fuel Use The gas tax and fuel use are shown. Tax 21.5 2...
 102.13: Commercial Movie Releases New movie releases per studio and gross r...
 102.14: Forest Fires and Acres Burned Number of fires and number of acres b...
 102.15: Years and contribution data are as follows: Years x 1 5 3 10 7 6 Co...
 102.16: State Debt and Per Capita Taxes Data for per capita state debt and ...
 102.17: School Districts and Secondary Schools The number of school distric...
 102.18: Triples and Home Runs The number of triples and the number of home ...
 102.19: Egg Production Number of eggs and price per dozen are shown. No. of...
 102.20: Emergency Calls and Temperature Temperature in degrees Fahrenheit a...
 102.21: Faculty and Students The number of faculty and the number of studen...
 102.22: Precipitation and Snowfall/Sleet The number of days of precipitatio...
 102.23: Average Temperature and Precipitation Temperatures (in degrees Fahr...
 102.24: NHLAssists and Total Points The number of assists and the total num...
 102.25: Fat Calories and Fat Grams The number of fat calories and the numbe...
 102.26: Tall Buildings Stories and heights of buildings data follow: Storie...
 102.27: Hospital Beds Licensed beds and staffed beds data follow: Licensed ...
 102.28: Fireworks and Injuries These data were obtained for the years 1993 ...
 102.29: Farm Acreage Is there a relationship between the number of farms in...
 102.30: SAT Scores Educational researchers desired to find out if a relatio...
 102.31: Coal Production These data were obtained from a sample of counties ...
 102.32: Television Viewers A television executive selects 10 television sho...
 102.33: Absences and Final Grades An educator wants to see how the number o...
 102.34: Fathers and Sons Weights A physician wishes to know whether there i...
 102.35: Age and Net Worth Is a persons age related to his or her net worth?...
 102.36: For Exercises 13, 15, and 21 in Section 101, find the mean of the x...
 102.37: The y intercept value a can also be found by using the equation a _...
 102.38: The value of the correlation coefficient can also be found by using...
Solutions for Chapter 102: Regression
Full solutions for Elementary Statistics: A Step by Step Approach 8th ed.  8th Edition
ISBN: 9780073386102
Solutions for Chapter 102: Regression
Get Full SolutionsElementary Statistics: A Step by Step Approach 8th ed. was written by and is associated to the ISBN: 9780073386102. Since 38 problems in chapter 102: Regression have been answered, more than 37120 students have viewed full stepbystep solutions from this chapter. This expansive textbook survival guide covers the following chapters and their solutions. Chapter 102: Regression includes 38 full stepbystep solutions. This textbook survival guide was created for the textbook: Elementary Statistics: A Step by Step Approach 8th ed., edition: 8.

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

Assignable cause
The portion of the variability in a set of observations that can be traced to speciic causes, such as operators, materials, or equipment. Also called a special cause.

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

Bernoulli trials
Sequences of independent trials with only two outcomes, generally called “success” and “failure,” in which the probability of success remains constant.

Bivariate distribution
The joint probability distribution of two random variables.

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.

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

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

Confounding
When a factorial experiment is run in blocks and the blocks are too small to contain a complete replicate of the experiment, one can run a fraction of the replicate in each block, but this results in losing information on some effects. These effects are linked with or confounded with the blocks. In general, when two factors are varied such that their individual effects cannot be determined separately, their effects are said to be confounded.

Contingency table.
A tabular arrangement expressing the assignment of members of a data set according to two or more categories or classiication criteria

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.

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.

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.

Density function
Another name for a probability density function

Design matrix
A matrix that provides the tests that are to be conducted in an experiment.

Empirical model
A model to relate a response to one or more regressors or factors that is developed from data obtained from the system.

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.

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

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