The report "Digital Democracy Survey"t describes a large national survey. In a representative sample of Americans ages 14 to 18 years, 45% indicated that they usually use social media while watching TV. Suppose that the sample size was 700. (a) Is there convincing evidence that less than half of Americans ages 14 to 18 years usually use social media while watching TV? Use a significance level of 0.05. State the appropriate null and alternative hypotheses. O H,: p = 0.5 versus H,: p > 0.5 Hoip # 0.5 versus H,: p = 0.5 O Ho: p < 0.5 versus H,: p > 0.5 O Ho: p = 0.5 versus H,: p = 0.5 O Ho: P = 0.5 versus H,: p < 0.5 Find the test statistic and P-value. (Use a table or technology. Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Fail to reject H,. We have convincing evidence that less than half of Americans ages 14 to 18 years usually use social media while watching TV. Fail to reject H,. We do not have convincing evidence that less than half of Americans ages 14 to 18 years usually use social media while watching TV. Reject Ho. We have convincing evidence that less than half of Americans ages 14 to 18 years usually use social media while watching TV. Reject H,. We do not have convincing evidence that less than half of Americans ages 14 to 18 years usually use social media while watching TV.

In a program designed to help patients stop smoking, 173 patients were given sustained care, and 80.9% of them were no longer smoking after one month. Use a 0.05 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho p=0.8 H1 p0.8 O C. Ho p=0.8 H1 p 0.8 O D. Ho p 0.8 Hiip=0.8

The average student loan debt is reported to be $25,235. A student belives that the student loan debt is higher in her area. She takes a random sample of 100 college students in her area and determines the mean to be $27,524 and the standard devition to be $6000. Is there sufficient evidence to support the student' claim at a 5% significance level? a) Determine the null and alternative hypotheses. Hai g Ha: Select an answer b) Determine the test statistic. Round to two decimals. t= c) Find the p-value. Round to 4 decimals. P-value= d) Make a decision. Reject the null hypothesis O Fail to reject the null hypothesis 15 e) Write the conclusion. O There is sufficient evidence to support the claim that student loan debt is higher than $25,235. O There is not sufficient evidence to support the claim that student loan debt is higher than $25,235. Type here to search EX #E (Put in the correct symbol and value) II (

The average January temperatures for popular tourist cities on selected continents is listed. Is there enough evidence at the 0.1 significance level to conclude a difference in temperatures for these three regions? Write a conclusion statement for your results. Asia: 89, 35, 83, 67, 48 Europe: 41, 38, 36, 56, 50 South America: 87, 75, 66, 84, 75

A random sample of 845 births included 435 boys. Use a 0.10 significance level to test the claim that 50.5% of newborn babies are boys. Do the results support the belief that 50.5% of newborn babies are boys? O A. Ho: p=0.505 H₁: p > 0.505 B. Ho: p=0.505 H₁: p<0.505 OC. Ho: p *0.505 H₁: p=0.505 D. H₁: p=0.505 H₁: p *0.505 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is 0.57. (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.)

8 Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test are discriminatory? Use a 0.05 significance level. Determine the null and alternative hypotheses. O A. Ho: White and minority candidates do not have the same chance of passing the test. H₁: White and minority candidates have the same chance of passing the test. OB. Ho: A white candidate is more likely to pass the test than a minority candidate. H₁: A white candidate is not more likely to pass the test than a minority candidate. OC. Ho: A white candidate is not more likely to pass the test than a minority candidate. H₁: A white candidate is more likely to pass the test than a minority candidate. O D. Ho: White and minority candidates have the same chance of passing the test. H₁: White and minority candidates do not have the same chance of passing the test. Determine the test statistic. x² = (Round to three decimal places as needed.)…

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A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 285 people over the age of 55, 76 dream in black and white, and among 287 people under the age of 25, 10 dream in black and white. Use a 0.01 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. 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? O A. Ho: P1 = P2 H: P1> P2 O B. Ho: P1 = P2 OC. Ho: P1 = P2 H: P Persuasive Spe.docx a Persuasive Spee.doc a PersuasiveSpch.doc tv MacBook Air F10 F9 心. 20 F3 FS esc F1 F2 & $ % 8 9 @ 4 5 6 2 Y W E R K #3

A researcher wants to know if mood is affected by music. She conducts a test on a sample of 4 randomly selected adults and measures mood rating before and after being exposed to classic rock music. Test the hypothesis that mood rating decreased after being exposed to classic rock music. The mood ratings for the four participants are provided. Assume that all conditions for testing have been met. Report the null and alternative hypothesis and p-value. At the 1% significance level, state the decision regarding the null hypothesis and the conclusion about the original claim. Round all values to the nearest thousandth. Click the icon to view the mood ratings. OA. Ho Hdifference =0, Ha Hdifference >0; p=0.373; Reject the null hypothesis; there is strong evidence to suggest that exposure to classic rock music decreased mood rating. B. Ho Hdifference =0, Ha Hdifference >0; p=0.373; Fail to reject the null hypothesis; there is not strong evidence to suggest that exposure to classic rock music…

According to a survey of 650 Web users from Generation​ Y, 338reported using the Internet to download music. a. Determine the sample proportion. b. At the 10% significance​ level, do the data provide sufficient evidence to conclude that a majority of Generation Y Web users use the Internet to download​ music? Use the​ one-proportion z-test to perform the appropriate hypothesis​ test, after checking the conditions for the procedure. a. The sample proportion is b. What are the hypotheses for the​ one-proportion z-test? What is the test​ statistic? Identify the critical​ value(s). What is the conclusion of the hypothesis​ test?