If 10 parts per million is the threshold for poor air quality, based on the sample above, with 90% confidence, could you conclude that the air quality is poor? (a) Yes we can conclude that the air quality is poor (b) No we cannot conclude that the air quality is poor (c) We do not have enough information to come to a conclusion (d) None of the above answers are correct
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If 10 parts per million is the threshold for poor air quality, based on the sample above, with 90% confidence, could you conclude that the air quality is poor?
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- If the attachment picture answer is correct (if not, what is the answer & how did you get the answer) In the Invisible Gorilla experiment, the assumption is that most observers in this experiment would notice a person in a Gorilla suit walk into the middle of the ball tossers, beat their chest, and walk out. In our hypothetical example, H0 = The relative frequency of successes in the population is p = 0.75 (ie, most observers) HA = The relative frequency of success in the population is something other than p = 0.75 (p ≠ 0.75) In looking at your calculated 95% confidence interval (assuming your answer is correct), does the value of 0.75 fall inside or outside of the interval? Would you then reject or fail to reject the null hypothesis? (select all that applies) inside outside reject fail to rejectWhat does brand loyalty mean to consumers? According to a recent research report, 38% of consumers associate trust with brand loyalty. Complete parts (a) through (e) below. ..... a. To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within +0.04 of the population proportion, how large a sample size is required? A sample size of 566 consumers is required. (Round up to the nearest integer.) b. To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within +0.04 of the population proportion, how many people need to be sampled? A sample size of 978 consumers is needed. (Round up to the nearest integer.) c. To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within +0.02 of the population proportion, how large a sample size is required? A sample size of 2263 consumers is required. (Round up to the nearest integer.) d. To conduct a follow-up study…You wish to test the following claim (H) at a significance level of a = 0.01. Ho: P₁ = P2 p1 H₁: P₁ P2 = 685 from You obtain 127 successes in a sample of size ni the first population. You obtain 131 successes in a sample of size n2 = 786 from the second population. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =
- You wish to test the following claim (Ha) at a significance level of a = 0.02. H.: P1 - P2 = 0 H.:P1 - P2You wish to test the following claim (Ha) at a significance level of a = 0.002. = Ho: P₁ Ha: P1 P2 P2 You obtain a sample from the first population with 594 successes and 78 failures. You obtain a sample from the second population with 558 successes and 44 failures. The test statistic is... O in the critical region not in the critical region critical value = test statistic = This test statistic leads to a decision to... reject the null hypothesis fail to reject the null hypothesis [three decimal accuracy] [three decimal accuracy] As such, the final conclusion is that... O There is sufficient evidence to support that the first population proportion is less than the second population proportion. There is not sufficient evidence to support that the first population proportion is less than the second population proportion.A researcher was doing a study for a new Coronavirus Drug and conducted a hypothesis test like this one: H0: μ = 18 Ha: μ ≠ 18 a. What type of test is this? left-tailed right-tailed two-tailed b. She obtained a test statistic of 0.75, with a p-value of 0.4648. So she concluded that her true mean must be equal to 18. Is this interpretation correct? Yes No Why or why not?Suppose a 95% confidence interval for the difference in test scores between Class 1 and Class 2 (in that order) is the following: 9 +/− 2. These results were based on independent samples of size 100 from each class. Now suppose you switch the order of Class 1 and Class 2 in your analysis but keep the data labeled correctly in terms of which class they came from. Which of the following statements is false? A) You can't do it this way. You'll get negative numbers for the difference in the means and/or negative numbers for the standard error. B) You are confident that the average for Class 2 is 7 to 11 points lower than for Class 1. C) You are still confident that the classes have significantly different mean scores. D) Your 95% confidence interval will now be entirely negative: from −7 to −11.You wish to test the following daim (Ha) at a significance level of a = 0.05. Ho:P1 P2 You obtain a sample from the first population with 422 successes and 126 failures. You obtain a sample from the second population with 385 successes and 176 failures. critical value = [three decimal accuracy] test statistic = [three decimal accuracy]What is the conclusion? What is your conclusion? -There is no evidence to suggest a difference. -There is a difference in newborns' APGAR score based on whether the mother smoked or not. -Newborns whose mothers didn't smoke have higher APGAR score than newborns whose mother did smoke. -Newborns whose mothers didn't smoke have lower APGAR score than newborns whose mother did smoke.EXAMPLE 2 Fewer Than 30% of Adults Have Sleepwalked? Using the same sleepwalking data from Example 1 (n = 20,000 and ôi = 28.5% would a reporter be justified in stating that “fewer than 30% of adults have sieef - walked"? Let's use a 0.05 significance level to test the claim that for the adult popu- lation, the proportion of those who have sleepwalked is less than 0.30.A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within five percentage points with 99% confidence, assuming that (a) he uses the estimates of 21.6% male and 18.7% female from a previous year? (b) he does not use any prior estimates?Please help me find the standardized test statistic and the P-value