1 Stats Starts Here 2 Displaying And Describing Categorical Data 3 Displaying And Summarizing Quantitative Data 4 Understanding And Comparing Distributions 5 The Standard Deviation As A Ruler And The Normal Model 6 Scatterplots, Association, And Correlation 7 Linear Regression 8 Regression Wisdom 9 Re-expressing Data: Get It Straight! 10 Understanding Randomness 11 Sample Surveys 12 Experiments And Observational Studies 13 From Randomness To Probability 14 Probability Rules! 15 Random Variables 16 Probability Models 17 Sampling Distribution Models 18 Confidence Intervals For Proportions 19 Testing Hypotheses About Proportions 20 Inferences About Means 21 More About Tests And Intervals 22 Comparing Groups 23 Paired Samples And Blocks 24 Comparing Counts 25 Inferences For Regression 26 Analysis Of Variance 27 Multifactor Analysis Of Variance 28 Multiple Regression 29 Multiple Regression Wisdom (available On Dvd And Also Online: Pearsonhighered.com/dvb) R Review Exercises expand_more
12.1 Observational Studies 12.2 Randomized, Comparative Experiments 12.3 The Four Principles Of Experimental Design 12.4 Control Treatments 12.5 Blocking 12.6 Confounding Chapter Questions expand_more
Problem 1E Problem 2E: 2. E-commerce A business student conjectures that the Internet caused companies to become more... Problem 3E: 3. Tips A pizza delivery driver, always trying to increase tips, runs an experiment on his next 40... Problem 4E: 4. Tomatoes You want to compare the tastiness and juiciness of tomatoes grown with three amounts of... Problem 5E: 5. Tips II For the experiment described in Exercise 3, list the factor, the levels, and the response... Problem 6E: 6. Tomatoes II For the experiment described in Exercise 4, name the factor and its levels. How might... Problem 7E: 7. Tips again For the experiment of Exercise 3, name some variables the driver did or should have... Problem 8E: 8. Tomatoes again For the experiment of Exercise 4, discuss variables that could be controlled or... Problem 9E: 9. More tips Is the experiment of Exercise 3 blind? Can it be double-blind? Explain.
Problem 10E: 10. More tomatoes If the tomato taster doesn’t know how the tomatoes have been treated, is the... Problem 11E: 11. Block that tip The driver of Exercise 3 wants to know about tipping in general. So he recruits... Problem 12E: 12. Blocking tomatoes To obtain enough plants for the tomato experiment of Exercise 4, experimenters... Problem 13E: 13. Confounded tips For the experiment of Exercise 3, name some confounding variables that might... Problem 14E: 14. Tomatoes finis What factors might confound the results of the experiment in Exercise 4?
Problem 15E: 15. Standardized test scores For his statistics class experiment, researcher J. Gilbert decided to... Problem 16E: 16. Heart attacks and height Researchers who examined health records of thousands of males found... Problem 17E: 17. MS and vitamin D Multiple sclerosis (MS) is an autoimmune disease that strikes more often the... Problem 18E: 18. Super Bowl commercials When spending large amounts to purchase advertising time, companies want... Problem 19E Problem 20E: 20. Honesty Coffee stations in offices often just ask users to leave money in a tray to pay for... Problem 21E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 22E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 23E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 24E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 25E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 26E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 27E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 28E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 29E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 30E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 31E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 32E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 33E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 34E: 21–34. What’s the design? Read each brief report of statistical research, and identify
a) whether it... Problem 35E: 35. Omega-3 Exercise 21 describes an experiment that showed that high doses of omega-3 fats might be... Problem 36E: 36. Insomnia Exercise 24 describes an experiment showing that exercise helped people sleep better.... Problem 37E: 37. Omega-3, revisited Exercises 21 and 35 describe an experiment investigating a dietary approach... Problem 38E: 38. Insomnia, again Exercises 24 and 36 describe an experiment investigating the effectiveness of... Problem 39E: 39. Omega-3, finis Exercises 21, 35, and 37 describe an experiment investigating the effectiveness... Problem 40E: 40. Insomnia, at last Exercises 24, 36, and 38 describe an experiment investigating the... Problem 41E: 41. Injuries Exercise 33 describes an experiment that studies hamstring injuries. Describe a... Problem 42E: 42. Tomatoes II Describe a strategy to randomly split 24 tomato plants into the three groups for the... Problem 43E: 43. Shoes A running-shoe manufacturer wants to test the effect of its new sprinting shoe on... Problem 44E: 44. Swimsuits A swimsuit manufacturer wants to test the speed of its newly designed suit. The... Problem 45E: 45. Hamstrings Exercise 33 discussed an experiment to see if the time it took athletes with... Problem 46E: 46. Diet and blood pressure An experiment showed that subjects fed the DASH diet were able to lower... Problem 47E Problem 48E: 48. Contrast baths Contrast bath treatments use the immersion of an injured limb alternately in... Problem 49E Problem 50E: 50. Swimming Recently, a group of adults who swim regularly for exercise were evaluated for... Problem 51E: 51. Dowsing Before drilling for water, many rural homeowners hire a dowser (a person who claims to... Problem 52E: 52. Healing A medical researcher suspects that giving postsurgical patients large doses of vitamin E... Problem 53E: 53. Reading Some schools teach reading using phonics (the sounds made by letters) and others using... Problem 54E: 54. Gas mileage Do cars get better gas mileage with premium instead of regular unleaded gasoline? It... Problem 55E: 55. Weekend deaths A study published in the New England Journal of Medicine (Aug. 2001) suggests... Problem 56E: 56. Shingles A research doctor has discovered a new ointment that she believes will be more... Problem 57E: 57. Beetles Hoping to learn how to control crop damage by a certain species of beetle, a researcher... Problem 58E: 58. SAT prep Can special study courses actually help raise SAT scores? One organization says that... Problem 59E: 59. Safety switch An industrial machine requires an emergency shutoff switch that must be designed... Problem 60E: 60. Washing clothes A consumer group wants to test the effectiveness of a new “organic” laundry... Problem 61E: 61. Skydiving, anyone? A humor piece published in the British Medical Journal (“Parachute use to... format_list_bulleted