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In a recent poll 1011, randomly selected adults were asked whether they approve of labor unions;57% said yes. In 1936, about62%of adults approved of labor unions. At the 1% significance level, do the data provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936?
Given :
Claim : The percentage of adults who approve of labor unions has decreased since 1936.
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- 3. A researcher goes to a local park to see how many people are wearing face masks. She counts 85 women in the park, of whom 34 are wearing face masks, while 14 out of 60 men are wearing face masks. Can she say that there is a significant difference of the percent of each gender who wears masks? (Use a = .10) Type of Test: Null Hypothesis: Alternate Hypothesis: SE: Test Statistic: P-value: Decision: Sentence:A software company is interested in improving customer satisfaction rate from the 75% currently claimed. The company sponsored a survey of 136 customers and found that 109 customers were satisfied. What is the test statistic z?An online poll asked: "Do you believe the Loch Ness monster exists?" Among 22,038 responses,63 % were "yes." Use a 0.10 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond?
- A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 317 people over the age of 55, 65 dream in black and white, and among 287 people under the age of 25, 11 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. 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 altemative hypotheses for the hypothesis test? O A. Ho P1 sP2 H P, P2 O B. Ho P1 = P2 H, P, #P2 O C. H, P, P2 H, P, = P2 O D. Ho P1 =P2 H Pqhelp me fix a please !!Can you please answer: C-EUSA Today (Feb. 17, 2011) described a survey of 1,008 American adults. One question on the survey asked people if they had ever sent a love letter using e-mail. Suppose that this survey used a random sample of adults and 205 stated that they had written a love letter using e-mail. Is this evidence that more than 20% of American adults have written a love letter using e-mail? Use a level of significance of 5%. a) p: (3 decimal places) b) Complete the following areas. Label the critical value and test statistic on the curve and shade the rejection region(s). Họ: Hi: Type of Test: Test Statistic: (2 decimal places) Critical Value(s): (2 decimal places) P-Value: (4 decimal places) Reject or Fail to Reject:One survey showed that among 766 randomly selected subjects who completed four years of college, 18.3% smoke and 81.7% do not smoke. Use a 0.01 significance level to test the claim that the rate of smoking among those with four years of college is less than the 27% rate for the general population. . Calculate the P-value. Which of these options is closest to the P-value? A. 0.0005 B. 0.9999 C. 0.5000 D. 0.0001 e. State the technical conclusion. A. Do not reject Upper H 0 B. Reject Upper H 0 f. State the final conclusion. A. The sample data support the claim. B. There is sufficient evidence to warrant rejection of the claim. C. There is not sufficient evidence to warrant rejection of the claim. D. There is not sufficient sample evidence to support the claim. g. Based on the results, does it appear that those who completed four years of college…A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 321 people over the age of 55, 77 dream in black and white, and among 311 people under the age of 25, 13 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. 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. Ho: P1 P2 H₁: P₁ P2 OD. Ho: P1 P2 Н1:01A question in a poll taken in 2007 asked, "Do you think the penalties for underage drinking should be made more strict, less strict, or remain the same?" The sample proportion that responded "more strict" was 0.61 (61%). This result will be used to estimate the proportion of all adults in the United States who think that penalties for underage drinking should be more strict. The sample consisted of n = 500 randomly selected adults in the United States Calculate a 95% confidence interval that estimates the population proportion who think that penalties for underage drinking should be more strict. (Round your answers to three decimal places.)A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 315 people over the age of 55, 61 dream in black and white, and among 285 people under the age of 25, 12 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. 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? O A. Ho: P1 = P2 H1: P1 > P2 O B. Ho: P1 # P2 H1: P1 = P2 OC. Ho: P1 = P2 H;:PqA software company is interested in improving customer satisfaction rate from the 55% currently claimed. The company sponsored a survey of 247 customers and found that 146 customers were satisfied. What is the test statistic z?SEE MORE QUESTIONSRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
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