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Testing Claims About Proportions. In Exercises 9–32, test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Use the P-value method unless your instructor specifies otherwise. Use the
15. Survey Return Rate In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 5000 subjects randomly selected from an online group involved with ears. 717 surveys were returned. Use a 0.01 significance level to test the claim that the return rate is less than 15%.
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Chapter 8 Solutions
Elementary Statistics (13th Edition)
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Introductory Statistics (2nd Edition)
Statistics: The Art and Science of Learning from Data (4th Edition)
Intro Stats, Books a la Carte Edition (5th Edition)
An Introduction to Mathematical Statistics and Its Applications (6th Edition)
Statistics for Business and Economics (13th Edition)
- Binomial distribution probability is based on a. Mean and standard deviation Ob. Number of trials and probability of success Oc. Standard deviation and number of success Od. Mean and probability of successarrow_forwardIn the real world, what kinds of data are distributed in the shape of a bell curve? Cite examples of how the Bell Curve has been used that you think are good, or bad, or neutral.arrow_forwardIn Exercises 13–20, use the data in the table below for sitting adult males and females (based on anthropometric survey data from Gordon, Churchill, et al.). These data are used often in the design of different seats, including aircraft seats, train seats, theater seats, and classroom seats. (Hint: Draw a graph in each case.) Sitting Back-to-Knee Length (inches) Find the probability that a female has a back-to-knee length greater than 24.0 in.arrow_forward
- I have attached the table data analysisarrow_forwardsub= 24 helparrow_forwardA survey was conducted two years ago asking college students their top motivations for using a credit card. You think this distribution has changed. You randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the distribution? Use oa = 0.025. Complete parts (a) through (d). Response Old Survey % New Survey Frequency, f Rewards Low rates Cash back Discounts Other 28% 111 24% 98 22% 108 7% 47 19% 61 a. State Ho and H, and identify the claim. What is the null hypothesis, Ho ? A. The distribution of motivations differs from the old survey. B. The distribution of motivations is 28% rewards, 24% low rate, 22% cash back, 7% discounts, and 19% other. C. The distribution of motivations is 111 rewards, 98 low rate, 108 cash back, 47 discounts, and 61 other. What is the alternate hypothesis, Ha? A. The distribution of motivations is 111 rewards, 98 low rate, 108 cash back, 47 discounts, and 61…arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill