Solutions for Introductory Statistics (2nd Edition)
Problem 1SE:
Parameter vs. Statistic (Example 1) Explain the difference between a parameter and a statistic.Problem 2SE:
Sample vs. Census Explain the difference between a simple and a census. Every 10 years, the U.S....Problem 3SE:
x vs. Two symbols are used for the mean: and x. a. Which represents a parameter, and which a...Problem 4SE:
xvs. The mean GPA of all 5000 students at Uneeda College is 2.78. A sample of 50 GPAs from this...Problem 5SE:
Ages of Presidents Suppose you knew the age at inauguration of all the past U.S. presidents. Could...Problem 6SE:
Heights of Basketball Team Suppose you find all the of the height of the members of the men's...Problem 7SE:
Sample vs. Census You are receiving a large shipment of batteries and want to test their lifetimes....Problem 8SE:
Sampling GPAs Suppose you want to estimate the mean grade point average (GPA) of all students at...Problem 9SE:
Sampling with and without Replacement Explain the difference between sampling with replacement and...Problem 10SE:
Simple Random Sampling Is simple random sampling usually done with or without replacement?Problem 11SE:
Finding a Random Sample (Example 5) You need to select a simple random sample of four from eight...Problem 12SE:
Finding a Random Sample You need to select a simple random sample of two from six friends who will...Problem 13SE:
Random Sampling Assume your class has 30 students and you want a random sample of 10 of them....Problem 14SE:
Random Sampling with Coins Assume your class has 30 students and you want a random sample of 10 of...Problem 15SE:
Questionnaire Response (Example 3) A teacher at a community college sent out questionnaires to...Problem 16SE:
Survey on Social Security A phone survey asked whether Social Security should be continued or...Problem 17SE:
Views on Capital Punishment In carrying out a study of views on capital punishment, a student asked...Problem 18SE:
Views on Capital Punishment Use the data given in Exercise 7.23. Make the two given tables into one...Problem 19SE:
Targets: Bias or Lack of Precision? a. If a rifleman’s gunsight is adjusted incorrectly, he might...Problem 20SE:
Targets: Bias or Lack of Precision, Again a. If a rifleman’s gunsight is adjusted correctly, but he...Problem 21SE:
Bias? Suppose that, when taking a random sample of three students’ GPAs, you get a sample mean of...Problem 22SE:
Unbiased Sample? Suppose you attend a school that offers both traditional courses and online...Problem 23SE:
Proportion of Odd Digits A large collection of one-digit random numbers should have about 50 odd and...Problem 24SE:
Proportion of Odd Digits 1,3,5,7,and9areoddand0,2,4,6,and8 are even. Consider a 30-digit line from a...Problem 27SE:
ESP A Zener deck of cards has cards that show one of five different shapes with equal...Problem 28SE:
ESP Again In the graphs for Exercise 7.33, explain how you can tell from the shape of the graph...Problem 29SE:
Standard Error Which of the dotplots given in Exercise 7.33 has the largest standard error, and...Problem 30SE:
Bias? Assuming that the true proportion of success for the trials shown in the graph for Exercise...Problem 31SE:
Fair Coin? One of the graphs shows the proportion of heads from flipping a fair coin 10 times,...Problem 33SE:
What Is the Proportion of Seniors? (Example 5) A population of college students is taking an...Problem 34SE:
Simulation From a very large (essentially infinite) population, of which half are men and half are...Problem 35SE:
MMs (Example 5) Return to Exercise 7.25 and find the approximate probability that the random sample...Problem 36SE:
Random Letters Return to Exercise 7.26 and find the approximate probability that the random sample...Problem 37SE:
Jury Selection (Example 6) Juries should have the same racial distribution as the surrounding...Problem 38SE:
Mercury in Freshwater Fish According to an article from Huffington Post.com, some experts believe...Problem 39SE:
The Oregon Bar Exam (Example 7) According to the Oregon Bar Association, approximately 65 of the...Problem 40SE:
Feeding Vegans A survey of eating habits showed that approximately 4 of people in Portland, Oregon,...Problem 41SE:
Overweight Children The Ventura County Star (June 20, 2012) reported on a study of children in...Problem 42SE:
Living in Poverty The Ventura County Star article mentioned in Exercise 7.41 also reported that 25...Problem 43SE:
Passing a Test by Guessing A true/false test has 40 questions. A passing grade is 60 or more correct...Problem 44SE:
Gender: Randomly Chosen? A large community college district has 1000 teachers, of whom 50 are men...Problem 46SE:
Is Marriage Becoming Obsolete? When asked whether marriage is becoming obsolete, 782 out of 2004...Problem 47SE:
East Germany According to a Gallup Poll taken in East Germany, when adults were asked whether they...Problem 48SE:
View of Immigration In June 2012, a Gallup Poll asked U.S adults whether immigration was a good...Problem 49SE:
Voting A random sample of likely voters showed that 55 planned to vote for Candidate X, with a...Problem 50SE:
Voting A random sample of likely voters showed that 49 planned to support Measure X. The margin of...Problem 51SE:
High School Diplomas (Example 8) In a simple random sample of 1500 young Americans, 87 had earned a...Problem 52SE:
Diabetes In a simple random sample of 1200 Americans age 20 and over, the proportion with diabetes...Problem 53SE:
Confidence in Public Schools A 2012 Gallup Poll reported that only 581 out of a total of 2004 U.S....Problem 54SE:
Confidence in the Military In June 2012, a Gallup Poll reported that 1503 out of a total of 2004...Problem 55SE:
Thriving In June 2012, a Gallup Poll showed that when a sample of Americans were asked whether they...Problem 56SE:
Benefits of Rich Class In May 2012, a Gallup Poll showed that 63 of randomly surveyed U.S. adults...Problem 57SE:
Understanding the Meaning of Confidence Levels: 90 (Example 9) Each student in a class of 40 was...Problem 58SE:
Understanding the Meaning of Confidence Levels: 80 Each student in a class of 30 was assigned one...Problem 59SE:
Past Presidential Vote In the 1960 presidential election, 34,226,731 people voted for Kennedy,...Problem 60SE:
Human Cloning In a Gallup Poll, 441 of 507 adults said it was "morally wrong" to clone humans. a....Problem 61SE:
Do People Think Astrology Is Scientific? (Example 10) In the 2012 General Social Survey, people were...Problem 62SE:
Do People Think the Sun Goes around the Earth? In the 2012 General Social Survey, people were asked...Problem 63SE:
Good News on Jobs The Pew Research Center reports on a survey taken in late 2013 in which they asked...Problem 64SE:
Obesity In a 2013 Pew Poll, 36#37; of Republicans and 28#37; of Democrats agreed with the statement...Problem 65SE:
Stressed Moms (Example 11, 12, 13, and 14) An April 2012 Gallup Poll of low-income showed that 54 of...Problem 66SE:
Gay Marriage According to the Pew Research Center, 47 of respondents to a poll in April 2012...Problem 67SE:
Perry Preschool and Graduation from High School The Perry Preschool Project was created in the early...Problem 68SE:
Preschool: Just the Boys Refer to Exercise 7.77 for information. This data set records results just...Problem 69SE:
Antibiotics for Malnutrition (Example 15) A study was done of children from Malawi (in southeastern...Problem 70SE:
Transfusions for Bleeding in the Stomach Should patients who are bleeding from the stomach get...Problem 71SE:
Gender and Use of Turn Signals Statistics student Hector Porath wanted to find out whether gender...Problem 72SE:
Diet Drug (Meridia) A randomized, placebo-controlled study of a diet drug (Meridia) was done on...Problem 73SE:
Drug for Nausea Ondansetron (Zofran) is a drug used by some pregnant women for nausea. There was...Problem 74SE:
Preschool: Just the Girls The Perry Preschool Project was created in the early 1960s by David...Problem 75CRE:
Banning Super-Size Sugary Drinks A June 2012 Rasmussen Poll showed that 65 of its randomly selected...Problem 76CRE:
Banning Smoking A July 2011 Roper Poll showed that 59 of its randomly selected U.S. adults would...Problem 77CRE:
Sample Proportion A poll on a proposition showed that we are 95 confident that the population...Problem 78CRE:
Sample Proportion A poll on a proposition showed that we are 99 confident that the population...Problem 79CRE:
Margin of Error A poll on a proposition showed that we are 95 confident that the population...Problem 80CRE:
Margin of Error A poll on a proposition showed that we are 99 confident that the population...Problem 83CRE:
Dreaming in Color According to studies done in the 1940s, 29 of people dream in color. Assuming this...Problem 84CRE:
Hand Washing Ignaz Semmelweiss (1818-1865) was the doctor who first encouraged other doctors to wash...Problem 85CRE:
Romney vs. Santorum During the Republican primary elections of 2012, Rasmussen Polls estimated that...Problem 86CRE:
Sampling Error In March 2012, President Obama's approval ratings were the highest they had been in...Problem 87CRE:
Young Women's Career Goals Are the career goals of young women changing? A Pew Poll asked young...Problem 88CRE:
Young Men's Career Goals Are the career goals of young men changing? A Pew Poll asked young men...Problem 89CRE:
Voters Poll: Sample Size A polling agency wants to determine the sample size required to get a...Problem 90CRE:
Ratio of Sample Sizes Find the sample size required for a margin of error of 3 percentage points,...Problem 91CRE:
Criticize the Sampling Marco is interested in whether Proposition P will be passed in the next...Problem 92CRE:
Criticize the Sampling Maria opposes capital punishment and wants to find out if a majority of...Problem 93CRE:
Random Sampling? If you walked around your school campus and asked people you met how many keys they...Problem 94CRE:
Biased Sample? You want to find the mean weight of the students at your college. You calculate the...Browse All Chapters of This Textbook
Chapter 1 - Introduction To DataChapter 2 - Picturing Variation With GraphsChapter 3 - Numerical Summaries Of Center And VariationChapter 4 - Regression Analysis: Exploring Associations Between VariablesChapter 5 - Modeling Variation With ProbabilityChapter 6 - Modeling Random Events: The Normal And Binomial ModelsChapter 7 - Survey Sampling And InferenceChapter 8 - Hypothesis Testing For Population ProportionsChapter 9 - Inferring Population MeansChapter 10 - Associations Between Categorical Variables
Book Details
We live in a data-driven world, and the goal of this text is to teach students how to access and analyze these data critically. Authors Rob Gould and Colleen Ryan emphasize that learning statistics extends beyond the classroom to an essential life skill, and want students to develop a "data habit of mind." Regardless of their math backgrounds, students will learn how to think about data and how to reason using data. With a clear, unintimidating writing style and carefully chosen pedagogy, this text makes data analysis accessible to all students.
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Introductory Statistics, Books a la Carte Plus NEW MyLab Statistics with Pearson eText - Access Card Package (2nd Edition)
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INTRO STAT CODE ONLY W/ STAT CRUNCH
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Student Solutions Manual For Introductory Statistics Exploring The World Through Data
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Ten Lessons in Introductory Sociology
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