Concept explainers
Formats of Confidence Intervals. In Exercises 9–12, express the confidence interval using the indicated format. (The confidence intervals are based on the proportions of red, orange, yellow, and blue M&Ms in Data Set 27 “M&M Weights” in Appendix B.)
9. Red M&Ms Express 0.0434 < p < 0.217 in the form of
Learn your wayIncludes step-by-step video
Chapter 7 Solutions
Elementary Statistics, Books A La Carte Edition Plus MyLab Statistics with Pearson eText - Access Card Package (13th Edition)
Additional Math Textbook Solutions
Statistics for Psychology
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Basic Business Statistics, Student Value Edition
Statistics: The Art and Science of Learning from Data (4th Edition)
Introductory Statistics (10th Edition)
- The body temperatures in degrees Fahrenheit of a sample of adults in one small town are: 96.4 97.4 98 98.3 99.6 97.6 96.5 96.7 99.9 98.5 96.6 Assume body temperatures of adults are normally distributed. Based on this data, find the 95% confidence interval of the mean body temperature of adults in the town. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places. Assume the data is from a normally distributed population. 95% C.I. =arrow_forwardStandard Error of Estimate A random sample of 118 different female statistics students is obtained and their weights are measured in kilograms and in pounds. Using the 118 paired weights (weight in kg, weight in lb), what is the value of se? For a female statistics student who weighs 100 lb, the predicted weight in kilograms is 45.4 kg. What is the 95% prediction interval?arrow_forwardAn archaeologist discovers only seven fossil skeletons from a previously unknown species of miniature horse. Reconstruction of the skeletons of these seven miniature horses show the shoulder height in centimeters to be 45.3 47.1 44.2 46.8 46.5 45.5 47.6 Find a 99% confidence interval for μ, the mean shoulder height of the entire population of such horses. An archaeologist discovers only seven fossil skeletons from a previously unknown species of miniature horse. Reconstruction of the skeletons of these seven miniature horses show the shoulder height in centimeters to be 45.3 47.1 44.2 46.8 46.5 45.5 47.6 Find a 99% confidence interval for μ, the mean shoulder height of the entire population of such horses. (45.07, 47.216) (43.92, 48.365) (43.222, 49.064) (45.042, 47.243) (44.475, 47.81)arrow_forward
- 6.18 Is college worth it? Part II: Exercise 6.16 presents the results of a poll where 48% of 331 Americans who decide to not go to college do so because they cannot afford it.(a) Calculate a 90% confidence interval for the proportion of Americans who decide to not go to college because they cannot afford it, and interpret the interval in context.lower bound:__________ (please round to four decimal places)upper bound:__________ (please round to four decimal places) Interpret the confidence interval in context: ______ We can be 90% confident that the proportion of Americans who choose not to go to college because they cannot afford it is contained within our confidence interval ______ 90% of Americans choose not to go to college because they cannot afford it _______ We can be 90% confident that our confidence interval contains the sample proportion of Americans who choose not to go to college because they cannot afford it (b) Suppose we wanted the margin of error for the 90%…arrow_forwardA random sample of n1n1 = 228 people who live in a city were selected and 85 identified as a republican. A random sample of n2n2 = 101 people who live in a rural area were selected and 54 identified as a republican. Find the 95% confidence interval for the difference in the proportion of people that live in a city who identify as a republican and the proportion of people that live in a rural area who identify as a republican. Round answers to 2 decimal places, use confidence interval notation : (___ , ___)arrow_forwardThe body temperatures in degrees Fahrenheit of a sample of adults in one small town are: 97.3 97.8 97.6 99.5 96.8 99.3 97.9 Assume body temperatures of adults are normally distributed. Based on this data, find the 95% confidence interval of the mean body temperature of adults in the town. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places. Assume the data is from a normally distributed population.95% C.I. =arrow_forward
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
- Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman