MyLab Statistics with Pearson eText -- Standalone Access Card -- for Fundamentals of Statistics
5th Edition
ISBN: 9780134743295
Author: Michael III Sullivan
Publisher: PEARSON
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Chapter 2.1, Problem 26AYU
a.
To determine
To check: Whether it is possible to draw a pie-chart for the land area of seven continents.
To draw: A pie-chart if it is possible.
b.
To determine
To check: Whether it is possible to draw a pie-chart for the highest elevation.
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(c) Because logistic regression predicts probabilities of outcomes, observations used to build a logistic regression model need not be independent.
A. false: all observations must be independent
B. true
C. false: only observations with the same outcome need to be independent
I ANSWERED: A. false: all observations must be independent.
(This was marked wrong but I have no idea why. Isn't this a basic assumption of logistic regression)
Business discuss
Spam filters are built on principles similar to those used in logistic regression. We fit a probability that each message is spam or not spam. We have several variables for each email. Here are a few: to_multiple=1 if there are multiple recipients, winner=1 if the word 'winner' appears in the subject line, format=1 if the email is poorly formatted, re_subj=1 if "re" appears in the subject line. A logistic model was fit to a dataset with the following output:
Estimate
SE
Z
Pr(>|Z|)
(Intercept)
-0.8161
0.086
-9.4895
0
to_multiple
-2.5651
0.3052
-8.4047
0
winner
1.5801
0.3156
5.0067
0
format
-0.1528
0.1136
-1.3451
0.1786
re_subj
-2.8401
0.363
-7.824
0
(a) Write down the model using the coefficients from the model fit.log_odds(spam) = -0.8161 + -2.5651 + to_multiple + 1.5801 winner + -0.1528 format + -2.8401 re_subj(b) Suppose we have an observation where to_multiple=0, winner=1, format=0, and re_subj=0. What is the predicted probability that this message is spam?…
Chapter 2 Solutions
MyLab Statistics with Pearson eText -- Standalone Access Card -- for Fundamentals of Statistics
Ch. 2.1 - Define raw data in your own words.Ch. 2.1 - A frequency distribution lists the _____ of...Ch. 2.1 - In a relative frequency distribution, what should...Ch. 2.1 - What is a bar graph? What is a Pareto chart?Ch. 2.1 - Flu Season The pie chart shown, the type we see in...Ch. 2.1 - Cosmetic Surgery This USA Today type chart shows...Ch. 2.1 - Most Valuable Player The following Pareto chart...Ch. 2.1 - Poverty The U.S. Census Bureau uses money income...Ch. 2.1 - Divorce The following graph represents the results...Ch. 2.1 - Identity Theft Identity fraud occurs when someone...
Ch. 2.1 - Made in America A random sample of 2163 adults...Ch. 2.1 - Desirability Attributes A random sample of 2163...Ch. 2.1 - College Survey In a national survey conducted by...Ch. 2.1 - College Survey In a national survey conducted by...Ch. 2.1 - Use the Internet? The Gallup organization...Ch. 2.1 - Dining Out A sample of 521 adults was asked, How...Ch. 2.1 - NW Texting A survey of U.S. adults and teens (ages...Ch. 2.1 - Educational Attainment The educational attainment...Ch. 2.1 - Dream Job A survey of adult men and women asked,...Ch. 2.1 - Car Color A survey of 100 randomly selected autos...Ch. 2.1 - Prob. 21AYUCh. 2.1 - Bachelor Party In a survey conducted by Opinion...Ch. 2.1 - Favorite Day to Eat Out A survey was conducted by...Ch. 2.1 - Prob. 25AYUCh. 2.1 - Prob. 26AYUCh. 2.1 - Prob. 27AYUCh. 2.1 - StatCrunch Survey Choose a qualitative variable...Ch. 2.1 - Putting It Together: Online Homework Keeping...Ch. 2.1 - When should relative frequencies be used when...Ch. 2.1 - Prob. 31AYUCh. 2.1 - Prob. 32AYUCh. 2.1 - Prob. 33AYUCh. 2.2 - The categories by which data are grouped are...Ch. 2.2 - The _____ class limit is the smallest value within...Ch. 2.2 - The _____ is the difference between consecutive...Ch. 2.2 - Prob. 4AYUCh. 2.2 - Prob. 5AYUCh. 2.2 - Prob. 6AYUCh. 2.2 - True or False: The shape of the distribution shown...Ch. 2.2 - Prob. 8AYUCh. 2.2 - Rolling the Dice An experiment was conducted in...Ch. 2.2 - Car Sales A car salesman records the number of...Ch. 2.2 - IQ Scores The following frequency histogram...Ch. 2.2 - Alcohol-Related Traffic Fatalities The frequency...Ch. 2.2 - In Problems 13 and 14, for each variable...Ch. 2.2 - In Problems 13 and 14, for each variable...Ch. 2.2 - Misery Index The following time-series plot shows...Ch. 2.2 - Prob. 16AYUCh. 2.2 - Predicting School Enrollment To predict future...Ch. 2.2 - Free Throws In an experiment, a researcher asks a...Ch. 2.2 - In Problems 1922, determine the original set of...Ch. 2.2 - In Problems 1922, determine the original set of...Ch. 2.2 - In Problems 1922, determine the original set of...Ch. 2.2 - In Problems 1922, determine the original set of...Ch. 2.2 - find (a) the number of classes, (b) the class...Ch. 2.2 - Earthquakes The following data represent the...Ch. 2.2 - In Problems 25 and 26, construct (a) a relative...Ch. 2.2 - In Problems 25 and 26, construct (a) a relative...Ch. 2.2 - NW Televisions in the Household A researcher with...Ch. 2.2 - Waiting The data below represent the number of...Ch. 2.2 - NW Gini Index The Gini Index is a measure of how...Ch. 2.2 - Average Income The following data represent the...Ch. 2.2 - Cigarette Tex Rates The table shows the tax, in...Ch. 2.2 - Dividend Yield A dividend is a payment from a...Ch. 2.2 - NW Violent Crimes Violent crimes include murder,...Ch. 2.2 - Volume of Altria Group Stock The volume of a stock...Ch. 2.2 - Prob. 35AYUCh. 2.2 - Prob. 36AYUCh. 2.2 - Prob. 37AYUCh. 2.2 - Prob. 38AYUCh. 2.2 - Prob. 39AYUCh. 2.2 - Prob. 40AYUCh. 2.2 - NW Violent Crimes Use the violent crime rate data...Ch. 2.2 - Academy Award Winners The following data represent...Ch. 2.2 - Prob. 43AYUCh. 2.2 - Sullivan Survey Choose a continuous quantitative...Ch. 2.2 - Prob. 46AYUCh. 2.2 - Prob. 47AYUCh. 2.2 - Waiting Draw a dot plot of the waiting data from...Ch. 2.2 - Prob. 49AYUCh. 2.2 - Prob. 50AYUCh. 2.2 - Prob. 51AYUCh. 2.2 - Prob. 52AYUCh. 2.2 - Prob. 53AYUCh. 2.2 - Putting It Together: Which Graphical Summary?...Ch. 2.2 - Prob. 55AYUCh. 2.2 - Prob. 56AYUCh. 2.2 - Discuss the advantages and disadvantages of...Ch. 2.2 - Prob. 58AYUCh. 2.2 - Describe the situations in which it is preferable...Ch. 2.2 - Sketch four histogramsone skewed right, one skewed...Ch. 2.2 - What type of variable is required when drawing...Ch. 2.3 - Inauguration Cost The following is a USA...Ch. 2.3 - Burning Calories The following is a USA Today-type...Ch. 2.3 - NW Median Earnings The graph shows the median...Ch. 2.3 - Union Membership The following relative frequency...Ch. 2.3 - NW Robberies A newspaper article claimed that the...Ch. 2.3 - Car Accidents An article in a student newspaper...Ch. 2.3 - Tax Revenue The following histogram drawn in...Ch. 2.3 - You Explain It! Oil Reserves The U.S. Strategic...Ch. 2.3 - NW Cost of Kids The following is a USA Today-type...Ch. 2.3 - Worker Injury The safety manager at Klutz...Ch. 2.3 - Health Care Expenditures The following data...Ch. 2.3 - Prob. 12AYUCh. 2.3 - NW Overweight Between 1980 and 2012, the number of...Ch. 2.3 - Ideal Family Size The following USA Today-type...Ch. 2.3 - National League Baseball MVP The following pie...Ch. 2.3 - Prob. 16AYUCh. 2 - Effective Commercial Harris Interactive conducted...Ch. 2 - Weapons Used in Homicide The following frequency...Ch. 2 - Live Births The following frequency distribution...Ch. 2 - Political Affiliation One hundred randomly...Ch. 2 - Family Size A random sample of 60 couples married...Ch. 2 - Home Ownership Rates The table shows the home...Ch. 2 - Diameter of a Cookie The following data represent...Ch. 2 - Time Online The following data represent the...Ch. 2 - Grade Inflation The side-by-side bar graph to the...Ch. 2 - Income Distribution The following data represent...Ch. 2 - Misleading Graphs In 2013, the average earnings of...Ch. 2 - High Heels The graphic to the right is a USA Today...Ch. 2 - The graph shows the ratings on Yelp for Hot Dougs...Ch. 2 - A random sample of 1005 adult Americans was asked,...Ch. 2 - Interested in knowing the educational background...Ch. 2 - The following data represent the number of cars...Ch. 2 - Dr. Paul Oswiecmiski randomly selects 40 of his...Ch. 2 - The following data represent the time (in minutes)...Ch. 2 - The data below shows birth rate and per capita...Ch. 2 - The following is a USA Today-type graph. Do you...Ch. 2 - A bar graph or pie chart (or both) that depicts...Ch. 2 - A histogram that displays the distribution of...Ch. 2 - Six histograms displaying tornado duration for...Ch. 2 - A bar chart that shows the relationship between...Ch. 2 - A bar chart that shows the relationship between...Ch. 2 - A general summary of your findings and...
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