Solutions for Introductory Statistics (2nd Edition)
Problem 1SE:
Ages A study of all the students at a small college showed a mean age of 20.7 and a standard...Problem 2SE:
Units A survey of 100 random full-time students at a large university showed the mean number of...Problem 3SE:
Exam Scores The distribution of the scores on a certain exam is N(70, 10), which means that the exam...Problem 4SE:
Exam Scores The distribution of the scores on a certain exam is N(70, 10), which means that the exam...Problem 6SE:
Cellphone Calls Answers.com claims that the mean length of all cell phone conversations in the...Problem 7SE:
Retirement Income Several times during the year, the U.S. Census Bureau takes random samples from...Problem 8SE:
Time Employed A human resources manager for a large company takes a random sample of 50 employees...Problem 11SE:
Babies Weights (Example 2) Some sources report that the weights of full-term newborn babies have a...Problem 12SE:
Babies’ Weights, Again Some sources report that the weights of full-term newborn babies have a mean...Problem 15SE:
CLT Shapes (Example 4) One of the histograms is a histogram of a sample (from a population with a...Problem 18SE:
Student Ages The mean age of all 2550 students at a small college is 22.8 years with a standard...Problem 24SE:
Random Numbers If you take samples of 40 lines from a random number table and find that the...Problem 25SE:
t* (Example 8) A researcher collects one sample of 27 measurements from a population and wants to...Problem 26SE:
t* A researcher collects a sample of 25 measurements from a population and wants to find a 99...Problem 27SE:
Hamburgers (Example 9) A hamburger chain sells large hamburgers. When we take a sample of 30...Problem 28SE:
Drinks A fast-food chain sells drinks that it calls HUGE. When we take a sample of 25 drinks and...Problem 29SE:
Men’s Pulse Rates (Example 10) A random sample of 25 men’s resting pulse rates shows a mean of 72...Problem 33SE:
Confidence Interval Changes State whether each of the following changes would make a confidence...Problem 34SE:
Confidence Interval Changes State whether each of the following changes would make a confidence...Problem 35SE:
Potatoes The weights of four randomly and independently selected bags of potatoes labeled 20 pounds...Problem 36SE:
Tomatoes The weights of four randomly and independently selected bags of tomatoes labeled 5 pounds...Problem 37SE:
Human Body Temperatures (Example 12) A random sample of 10 independent healthy people showed the...Problem 38SE:
Reaction Distance Data on the disk and website show reaction distances in centimeters for the...Problem 39SE:
Potatoes Use the data from exercise 9.35. a. If you use the four-step procedure with a two-sided...Problem 40SE:
Tomatoes Use the data from exercise 9.36. a. Using the four-step procedure with a two-sided...Problem 41SE:
Cholesterol In the U.S. Department of Health has suggested that a healthy total cholesterol...Problem 42SE:
BMI A body mass index (BMI) of more than 25 is considered unhealthy. The Minitab output given is...Problem 43SE:
Male Height In the United States, the population mean height for 3-year-old boys is 38 inches...Problem 45SE:
GPAs Thirty GPAs from a randomly selected sample of statistics students at Oxnard College are...Problem 47SE:
GPAs Using the data from Exercise 9.45 on GPAs, find a 95 confidence interval for the mean GPA....Problem 49SE:
Atkins Diet Difference Ten people went on an Atkins diet for a month. The weight losses experienced...Problem 50SE:
Pulse Difference The following numbers are the differences in pulse rate (beats per minute) before...Problem 51SE:
Student Ages Suppose that 200 statistics students each took a random sample (with replacement) of 50...Problem 52SE:
Presidents’ Ages at Inauguration A 95 confidence interval for the ages of the first six presidents...Problem 55SE:
Televisions: CI (Example 14) Minitab output is shown for a two-sample t-interval for the number of...Problem 56SE:
Pulse and Gender: CI Using data from NHANES, we looked at the pulse rate for nearly 800 people to...Problem 57SE:
Televisions (Example 15) The table shows the Minitab output for a two-sample t-test for the number...Problem 58SE:
Pulse Rates Using data from NHANES, we looked at the pulse rates of nearly 800 people to see whether...Problem 59SE:
Triglycerides Triglycerides are a form of fat found in the body. Using data from NHANES, we looked...Problem 60SE:
Systolic Blood Pressures When you have your blood pressure taken, the larger number is the systolic...Problem 61SE:
Triglycerides, Again Report and interpret the 95 confidence interval for the difference in mean...Problem 62SE:
Blood Pressures, Again Report and interpret the 95 confidence interval for the difference in mean...Problem 63SE:
Clothes Spending A random sample of 14 college women and a random sample of 19 college-men were...Problem 64SE:
College Athletes’ Weights A random sample of male college baseball players and a random sample of...Problem 66SE:
College Athletes’ Weights In exercise 9.64, you could reject the null hypothesis that the mean...Problem 67SE:
Textbook Prices, UCSB vs. CSUN (Example 16) The prices of a sample of books at University of...Problem 68SE:
Textbook Prices. OC vs. CSUN The prices of a random sample of comparable (matched) textbooks from...Problem 69SE:
Females’ Pulse Rates before and after a Fright (Example 17) In a statistics class taught by one of...Problem 70SE:
Males’ Pulse Rates before and after a Fright Follow the instructions for exercise 9.69, but use the...Problem 71SE:
Organic Food A student compared organic food prices at Target and Whole Foods. The same items were...Problem 72SE:
Smoking Mothers The birth weights of 35 babies whose mothers did not smoke and 22 babies whose...Problem 73SE:
Ages of Brides and Grooms Data for the ages of grooms and their brides for a random sample of 31...Problem 74SE:
Surfers Surfers and statistics students Rex Robinson and Sandy Hudson collected data on the number...Problem 75SE:
Self-Reported Heights of Men (Example 18) A random sample of students at Oxnard College reported...Problem 76SE:
Eating Out Jacqueline Loya, a statistics student, asked students with jobs how many times they went...Problem 77SE:
9.77, 9.79, and 9.80 For these questions, the data set is given at this text's website. Assume that...Problem 79SE:
9.77, 9.79, and 9.80 For these questions, the data set is given at this text's website. Assume that...Problem 80SE:
9.77, 9.79, and 9.80 For these questions, the data set is given at this text's website. Assume that...Problem 81CRE:
Choose a test for each situation: one-sample t-test, two-sample t-test, paired t-test. and no...Problem 82CRE:
Choose a t-test for each situation: one-sample t-test, two-sample t-test, paired t-test, and no...Problem 83CRE:
Cones: 3 Tests A McDonald’s fact sheet says its cones should weigh 3.18 ounces (converted from...Problem 85CRE:
Brain Size Brain size for 20 random women and 20 random men was obtained and is reported in the...Problem 87CRE:
Heart Rate before and after Coffee Elena Lucin, a statistics student, collected the data in the...Problem 88CRE:
Exam Grades The final exam grades for a sample of day-time statistics students and evening...Problem 89CRE:
Hours of Television Viewing The number of hours per week of television viewing for random samples of...Problem 90CRE:
Reaction Distances Reaction distances in centimeters for a random sample of 40 college students were...Problem 91CRE:
Shift Sleep Hours A survey was done comparing the number of hours of sleep for workers on the day...Problem 93CRE:
Maximum Tax Rate A random sample of 10 Democrats and 10 Republicans were asked what is the largest...Problem 95CRE:
Groceries The table shows the prices of identical groceries at 7-Eleven and at Vons. a. Test the...Problem 96CRE:
Parents The following table shows the heights (in inches) of a random sample of students and their...Problem 97CRE:
Why Is n1 in the Sample Standard Deviation? Why do we calculate s by dividing by n1, rather than...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.
Sample Solutions for this Textbook
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Introductory Statistics, Books a la Carte Plus NEW MyLab Statistics with Pearson eText - Access Card Package (2nd Edition)
2nd Edition
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INTRO STAT CODE ONLY W/ STAT CRUNCH
2nd Edition
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Student Solutions Manual For Introductory Statistics Exploring The World Through Data
2nd Edition
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Introductory Statistics: Exploring the World through Data, Books a la Carte Edition (2nd Edition)
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Introductory Statistics: Exploring The World Through Data, Canadian Edition,
17th Edition
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Introductory Statistics Exploring The World Through Data (preliminary Edition Volume 2)
12th Edition
ISBN: 9780321784636
Ten Lessons in Introductory Sociology
2nd Edition
ISBN: 9780190663872
Introductory Statistics Plus Mylab Statistics With Pearson Etext -- Access Card Package (2nd Edition)
2nd Edition
ISBN: 9780133956504
INTRODUCTORY STATISTICS-PACKAGE (LL)
2nd Edition
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Introductory Statistics: Exploring The World Through Data
1st Edition
ISBN: 9780321322159
Introductory Statistics + MyStatLab Student Access Kit
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ISBN: 9780321891938
Introductory Statistics: Exploring The World Through Data, Books A La Carte Plus Mystatlab -- Access Card Package
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ISBN: 9780321839749
Introductory Statistics: Exploring The World Through Data, Books A La Carte Edition
1st Edition
ISBN: 9780321780638
Student Solutions Manual For Introductory Statistics: Exploring The World Through Data
1st Edition
ISBN: 9780321756404
Introductory Statistics Plus Mylab Statistics With Pearson Etext -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780135229996
INTRODUCTORY STATISTICS (LOOSELEAF)
3rd Edition
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The King's minion: Richelieu, Louis XIII, and the affair of Cinq-Mars
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ISBN: 9780135163108
INTRO TO STATS (LL) +MYLAB STATS >BI<
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INTRODUCTORY STAT. W/MYLAB MATH>CUSTOM<
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Pearson eText Introductory Statistics: Exploring the World Through Data -- Instant Access (Pearson+)
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EP INTRODUCTORY STATISTICS-MYSTATLAB
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Introductory Statistics
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Student Solutions Manual For Introd
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