The US Department of Energy reported that 47% of homes were heated by natural gas. A random sample of317 homes in Oregon found that 150 were heated by natural gas. Test the claim that proportion of homesin Oregon that were heated by natural gas is different than what was reported. Use a 1% significancelevel. Give answer to at least 4 decimal places.What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)Hn: Select an answerv ?vH1: Select an answerv?vBased on the hypotheses, find the following:Test Statistic =(Round to two decimal places.)p-value =(Round to two decimal places.)Based on the above we choose to Select an answerThe correct summary would be: Select an answerhomes in Oregon that were heated by natural gas is different than what the DOE reported value of 47%.v that the proportion ofSubmit Question&W

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Answered: The US Department of Energy reported…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A sobriety test is 96% accurate. Suppose 2500 drivers were pulled over on suspicion ofintoxication, and suppose 12% of people pulled over were actually intoxicated (and the restwere sober). 1. What percentage of sober drivers failed the sobriety test? 2. What percentage of drivers who failed the sobriety test were sober? 3. What percentage of drivers who passed the sobriety test were intoxicated?
Determine the sample size required to estimate the mean score on a standardized test within 5points of the true mean with 98% confidence. Assume that s=15 based on earlier studies. A. 1 B. 147 C. 49 D. 7
Proctor & Gamble claims that at least half the bars of lvory soap they produce are 99.44% pure (or more pure) as advertised. Unilever, one of Proctor & Gamble's competitors, wishes to put this claim to the test. They sample the purity of 130 bars of Ivory soap. They find that 54 of them meet the 99.44% purity advertised. What type of test should be run? z-test of a proportion or t-test of a mean The alternative hypothesis indicates a : a. right-tailed test b. left-tailed test c. two-tailed test Calculate the p-value. Does Unilever have sufficient evidence to reject Proctor & Gamble's claim? yes or no
A magazine provided results from a poll of 1500 adults who were asked to identify their favorite pie. Among the 1500 respondents, 14% chose chocolate pie, and the margin of error was given as ±5 percentage points. Describe what is meant by the statement that "the margin of error was given as ±5 percentage points." Choose the correct answer below. A. The statement indicates that the study is only 5% confident that the true population percentage of people that prefer chocolate pie is exactly 14%. B. The statement indicates that the true population percentage of people that prefer chocolate pie is in the interval 14%±5%. C. The statement indicates that the interval 14%±5% is likely to contain the true population percentage of people that prefer chocolate pie.
Can you support the original claim? Choose the correct answer below.
Mr. Tabor believes that less than 75% of the students at his school completed their math homework last night. The math teachers inspect the homework assignments from a random sample of 50 students at the school. Only 68% of the students completed their math homework. We want to test ?0:?=0.75;??:?<0.75H0:p=0.75;Ha:p<0.75, where ?p = the true proportion of the students at Mr. Tabor’s school who completed their math homework last night. A significance test yields a ?P-value of 0.1265. What it would mean for the null hypothesis to be true in this setting? 1. Mr. Tabor’s students complete 75% of their homework last night. 2.cIf ?0:?=0.75H0:p=0.75 is true, then the proportion of the homework that the students at Mr. Tabor’s school completed last night is 0.75. 3. If ?0:?=0.75H0:p=0.75 is true, then the proportion of the sample who completed their homework last night is 0.75. 4. If ?0:?=0.75H0:p=0.75 is true, then the proportion of all students at Mr.…
Disney Corporation would like to know what proportion of diners at Disney Springs would prefer to have a grand view when they dine. They believe that the proportion who might be interested is close to 0.8 based on a pilot study. They want to be 95% confident with a margin of error equal to 0.02. Use JMP to determine what size sample they need. Round the answer as you should for this type of problem.
A cybersecurity team would like to detect the malwares in the software. They detect more than 42.5% malwares.From random sample of 200 softwares,76 had malwares.Calculate the value of test statistic. The value of test statistic is (Round your answer to three decimal places.)
Please assist with a,b,c C. Is the p value greater than or lesser than the level of significance? Is there enough evidence to support the claim?
*see image for question data* A. What is the p-value for your test? B. What is the conclusion of your test? a. Fail to reject H0 at the 0.05 level. There is evidence that methadone significantly reduced pain levels. b. Reject H0 at the 0.05 level. There is evidence that methadone significantly increased pain levels. c. Reject H0 at the 0.05 level. There is evidence that methadone significantly altered pain levels. d. Reject H0 at the 0.05 level. There is evidence that methadone significantly reduced pain levels.
Prof. Jacob wants to know, with 90% confidence, the proportion of students who like to eat in the cafeteria. A previous survey showed that 62% like to eat in the cafeteria. Prof. Jacob likes to be accurate with an error of 0.025 of its true proportion. What sample size does Prof. Jacob need?* A. 1,020 B. 1,020.06 C. 1,021 D. 1,022
Use the .05 level of significance. Solve for the appropriate test statistic

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