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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
ESSENTIALS OF STATISTICS 6TH ED W/MYSTA
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- Eagles always lay three eggs at a time. The number of eggs that hatch is described by the following probability distribution: 1. P(X = x) 0.1 0.3 0.4 0.2 Find the mean, variance and standard deviation. Write your solution on your paper. 3.arrow_forwardSeat Designs. In 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 male has a back-to-knee length between 22.0 in. and 24.0 in.arrow_forwardPlease answerarrow_forward
- AS3. NO3. DATA ANALYSISarrow_forwardChapter 5 Use the probability distribution. x P(x) 0 0.21 1 0.04 2 0.30 3 0.20 4 0.25 What is the probability x is less than 2? Find the mean and standard deviation of the probability distribution. Would P(1) be an unusual or significant outcome? Explain in 1 - 2 complete sentences.arrow_forwardpart d, earrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill