Concept explainers
Does It Make Sense? For Exercises 5–10, determine whether the statement makes sense (or is clearly true) or does not make sense (or is clearly false). Explain your choice clearly; not all of these have definitive answers, so your explanation is more important than your chosen answer.
5. Statistics and Parameters. After randomly selecting 1009 adults and surveying each of them, a pollster was able to determine that precisely 54% of all American adults are not comfortable having drones make deliveries to them.
Want to see the full answer?
Check out a sample textbook solutionChapter 1 Solutions
Statistical Reasoning for Everyday Life (5th Edition)
Additional Math Textbook Solutions
Statistics for Engineers and Scientists
Intro Stats, Books a la Carte Edition (5th Edition)
Statistics: Informed Decisions Using Data (5th Edition)
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Developmental Mathematics (9th Edition)
Statistics Through Applications
- Use this data for the exercises that follow: In 2013, there were roughly 317 million citizens in the United States, and about 40 million were elderly (aged 65 and over).[34] 60. It is predicted that by 2030, one in five U.S. citizens will be elderly. How much greater will the chances of meeting an elderly person be at that time? What policy changes do you foresee if these statistics hold true?arrow_forwardHow do you get online? A 2013 Pew Research survey of802 teens found that, among teens aged 12–17, girls weresignificantly more likely to access the internet mostlythrough their smartphone. 29% of the girls surveyed saidthey access the internet mostly on their phone, comparedto 20% of the boys. What does it mean to say that thedifference in proportions is “significant”?arrow_forwardA survey item administered at the end of a training program asked participants their opinion about whether the time spent on an activity was too much, too little, or just right. OBSERVED Too Much Too Little Just Right TOTAL Men 25 19 6 Women 35 11 54 TOTAL What is x2 critical?arrow_forward
- a skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is at most 0.002. Identify the alternative hypothesis Ha.arrow_forwardA nursing school professor is interested in determining how her college students compare to the national average when it comes to the Final Practicum Exam. The exam has a µ = 100 and σ = 20. There has been no evidence to suggest whether those seniors score better or worse than the national average and she is curious as to how her class (N=17) compares. Female Class Bench Ability (lbs.) 1 130 2 100 3 99 4 114 5 130 6 97 7 114 8 135 9 128 10 128 11 116 12 141 13 113 14 116 Write the null and alternative hypothesis in statistical form: Determine the mean for the sample: Apply the z-test formula What is your alpha level set to? α Determine the critical value(s) (Zcrit) Label the critical value(s) and indicate the position of the Zobt on the distribution Write the z result in the correct form:arrow_forwardA nursing school professor is interested in determining how her college students compare to the national average when it comes to the Final Practicum Exam. The exam has a µ = 100 and σ = 20. There has been no evidence to suggest whether those seniors score better or worse than the national average and she is curious as to how her class (N=17) compares. Data Students Exam Score 1 120 2 100 3 110 4 90 5 130 6 123 7 101 8 115 9 111 10 99 11 105 12 119 13 128 14 109 15 98 16 95 17 102 What is your alpha level set to? α: Determine the critical value(s) (Zcrit): Write the z result in the correct form:arrow_forward
- A nursing school professor is interested in determining how her college students compare to the national average when it comes to the Final Practicum Exam. The exam has a µ = 100 and σ = 20. There has been no evidence to suggest whether those seniors score better or worse than the national average and she is curious as to how her class (N=17) compares. Data Students Exam Score 1 120 2 100 3 110 4 90 5 130 6 123 7 101 8 115 9 111 10 99 11 105 12 119 13 128 14 109 15 98 16 95 17 102 Write the null and alternative hypothesis in statistical form: Determine the mean for the sample: Apply the z-test formula What is your alpha level set to? α Determine the critical value(s) (Zcrit) Label the critical value(s) and indicate the position of the Zobt on the distribution Write the z result in the correct form:arrow_forward(a) What proportion of women have blood pressures lower than 64? The proportion of women who have blood pressures lower than 64 is…arrow_forwardOn the first day of class, an economics professor administers a test to gauge the math preparedness of her students. She believes that the performance on this math test and the number of hours studied per week on the course are the primary factors that predict a student’s score on the final exam. She collects data from 60 students, a portion of which is shown in the accompanying table. Final Math Hours 94 92 5 74 90 3 74 87 4 76 84 3 66 87 2 80 49 4 74 42 3 71 61 4 84 81 5 76 67 5 95 93 4 78 56 5 71 54 3 82 96 2 65 50 3 77 86 2 78 88 2 63 78 2 76 55 5 71 44 4 70 80 1 73 80 4 62 41 2 70 69 4 60 51 2 76 79 4 70 54 2 55 53 1 77 58 5 81 97 2 59 42 1 95 76 5 59 57 2 64 57 2 61 80 2 74 65 3 75 87 3 76 42 4 75 67 3 71 89 3 72 71 3 84 53 5 73 68 2 83 83 4 57 54 1 79 88 4 88 90 4 69 93 2 82 76 5 52 46 3 71 61 2 66 47 4 69 60 3 74 56 5 62 83 1 62 41 2 78 80 4 66 43 2 78 41 5…arrow_forward
- Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin HarcourtHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal Littell