We’re testing the hypothesis that a higher percentage of women do aerobics than men. What are the correct hypotheses? Ho: PW ≤ PM; Ha: PW > PM Ho: PW ≠ PM; Ha: PW < PM Ho: PM ≤PW ; Ha: PM > PW Ho: PW = PM; Ha: PW ≠ PM
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Q: Given H,:u = 23, H;µ # 23, and P = 0.029. Do you reject or fail to reject H, at the 0.02 level of…
A: Given : To test : Ho : μ = 23 VS Ha : μ ≠ 23p=0.029α=0.02
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Q: The boxplot shown below results from the heights (cm) of males listed in a data set. What do the…
A: Introduction:
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Q: C2. Construct potential hypotheses or research questions to relate the variables in each of the…
A: As per guidelines we will only answer the first three subparts, please repost other subparts for…
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A: χ2 = ∑(O-E)2E---- Test stats ______________________________ E= Expected value/ count = (Row…
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Q: Which of the following research hypotheses is said to be directional? Ha: profits > $0 Ha:…
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A: A hypothesis testing is sued to test the claim about the population parameter.
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- It's estimated that 65% of the people who visit Omaha during the College World Series visit the Henry Doorly Zoo. The managers at the zoo recently undertook an extensive advertising project. They are interested in determining whether the project actually increased the proportion of tourists visiting the zoo. The correct set of hypotheses is Ho:p>.65 Ho: p.65.Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ, ρ, σ) for the indicated parameter. A psychologist claims that more than 5.8 percent of the population suffers from professional problems due to extreme shyness. Use p, the true percentage of the population that suffers from extreme shyness. Group of answer choices H0 : p = 5.8%H1 : p ≤ 5.8% H0 : p = 5.8%H1 : p < 5.8% H0 : p = 5.8%H1 : p > 5.8% H0 : p = 5.8%H1 : p ≥ 5.8%Which one of the following conclusions could be drawn from a descriptive study? Question options: a. Concrete experiences help students understand abstract ideas better. b.Students are more likely to appreciate classical music if they are exposed to it on a regular basis. c. Students do better in school when they have warm, supportive relationships with their teachers. d. Approximately 80% of the students at Southside High School are planning to go to college.
- Section 9.1 Question #5 A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 302 people over the age of 55, 80 dream in black and white, and among 296 people under the age of 25, 15 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and alternative hypotheses for the hypothesis test? A. H0: p1 = p2 H1: p1 < p2 B. H0: p1 = p2 H1: p1 > p2 C. H0: p1 ≤ p2 H1: p1 ≠ p2 D. H0: p1 ≠ p2 H1: p1 = p2 E. H0: p1 ≥ p2 H1: p1 ≠ p2 F. H0: p1 = p2 H1: p1 ≠ p2 Identify the test statistic. z= ___________ (Round to…Section 11.2 Question #4 The table below includes results from polygraph (lie detector) experiments conducted by researchers. In each case, it was known if the subjected lied or did not lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing between truth and lies? View the table Did the Subject Actually Lie? No (Did Not Lie) Yes (Lied) Polygraph test indicated that the subject lied. 9 48 Polygraph test indicated that the subject did not lie. 30 12 Determine the test statistic. χ2= _________ (Round to three decimal places as needed.) Determine the P-value of the test statistic. P-value= ___________ (Round to four decimal places as needed.)2. Do men with more children have higher blood pressure? In a study, blood pressures of men with more than three children were compared with those of men with three or fewer children. Which of the following is true for this study? a) The response variable is blood pressure. O b) The explanatory variable is blood pressure. c) The explanatory variable is number ofchildren ("more than three" vs. "three or fewer"). d) Both a and c ENG
- Which of the following research hypotheses is said to be non-directional? Ha: Salary ≠ $165,000 Ha: Obedience < 65%Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.In a study of all babies born at hospitals in one state, it was found that 48.1% of the babies were girls . Identify whether this value is a statistic or a parameter . A. The value is a statistic because it describes some characteristic of a population . B- The value is a parameter because it describes some characteristic of a sample . C- The value is a parameter because it describes some characteristic of a population
- O Macmillan Learning Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to be attractive. One study presented 200 young American men with 100 images of men with various levels of muscle. Researchers measure level of muscle in kilograms per square meter of body surface area (kg/m²). Typical young men have about 20 kg/m². Each subject chose two images, one that represented his own level of body muscle and one that he thought represented "what women prefer." The mean gap between self-image and "what women prefer" was 2.35 kg/m². Suppose that the "muscle gap" in the population of all young men has a Normal distribution with standard deviation 2.5 kg/m². Give a 90% confidence interval for the mean amount of muscle young men think they should add to be attractive to women. (They are wrong: women actually prefer a level close to that of typical men.) Give your answers to four decimal places. lower limit: upper limit: Chi-Fu Jeffrey Yang, Peter…A student compared organic food prices at Grocery 1 and Grocery 2. The same items were priced at each store. The first three items are shown in the accompanying Figure A. Choose the correct accompanying output (B or C) for the appropriate test, explaining why you chose that output. Then test the hypothesis that the population means are not equal using a significance level of 0.05. Assume i Figure A and Outputs Click the icon to view Figure A and the outputs. Which is the correct output (B or C) for the appropriate test? Explain. (Figure A) Food Grocery 1 0.89 Grocery 2 0.99 A. Output B is appropriate because the data are paired samples. Bananas/1 Ib Grape tomatoes/1 Ib Russet potato/5 Ib 4.19 4.49 B. Output C is appropriate because there are two samples. 4.69 4.49 C. Output B is appropriate because n2 25. (Figure B) D. Output C is appropriate because the data are independent samples. N Mean StDev SE Mean Test the hypothesis that the population means are not equal using a significance…Express the alternative hypothesis in symbolic form. An automobile technician claims that the mean amount of time (in hours) per domestic car repair is more than that of foreign cars. Assume that two samples are independent. Let the domestic car repair times be the first population and the foreign car repair times be the second population. O A. H H1 = H2 O B. H 1 42. O C. H H1 #P2 O D. H: P1
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