A researcher claims that 71% of voters favor gun control. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed.
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Q: Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics…
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Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…
A: Given n(sample size)=316 x( no. of success) =154
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A: Note:- As per our policy, we can answer only three subparts of a question. Please make a new request…
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A: Given: n=1500p^=0.39P=0.416
Q: Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics…
A: Sample size n =64 Favorable cases x =35 Sample proportion p^=x/n =35/64 =0.5469
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A: Given: n= 150 p=0.50 = 50%
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A: Answer:- A researcher hypothesizes that the average student spends less than 20% of their total…
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A: Answer: Option "D" is correct D.A chi-square test of independence
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A: Given information: In a random poll it is asked that: “The proposed casino will produce a number of…
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A: Solution: Given information : p = 0.34 Population proportion n =420 Sample size
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A: Given Information: Percentage of registered voters = 52% ± 3%
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A: Margin of error Margin of error doesn't indicate any potential bias introduced .
Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…
A: Given,n=400x=144p^=xnp^=144400=0.36
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A: Given: Among the college students the proportion p who say they’re interested in their…
Q: After a product recall, a company solicits feedback from a random sample of 100 customers regarding…
A: The chi-square test statistic is χ2=7.77 and the P-value is between 0.02 and 0.025.
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- Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 9.79.7 million out of the 312.7312.7 million Americans suffer from sleep apnea, or approximately 3.1%3.1%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population’s percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%3.1%, a simple random sample of 406406 commercial truck drivers is examined by a medical expert, who concludes that 55 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 3.1%3.1%? Use a 0.050.05 level of significance. Step 2 of 3 : Compute the value of the…A public opinion organization wants to know if opinions on gun control laws have changed over time. A poll conducted in 2006 found that 55% of people favored stricter gun laws. A poll conducted in 2018 surveyed 250 people and found that 153 people favored stricter gun laws. Perform a hypothesis test to see if the results of the survey provide evidence that the proportion of people favoring stricter gun laws has changed from 2006 to 2018. For a hypothesis test, what would your hypotheses be? Find the p-value? Regardless of your answer to the previous question, let's say you find the p-value is 0.15. If alpha = 0.05, what is your conclusion? Group of answer choices Reject null hypothesis. We have evidence that the proportion favoring stricter gun laws has changed. Reject null hypothesis. We do not have evidence that the proportion favoring stricter gun laws has changed. Do not reject null hypothesis. We have evidence that the proportion favoring stricter gun laws has…tab A study showed that 62% of supermarket shoppers believe supermarket brands to be as good as national name brands. To investigate whether this result applies to its own product, the manufacturer of a national name-brand ketchup asked a sample of shoppers whether they believed that supermarket ketchup was as good as the national brand ketchup. (a) Formulate the hypotheses that could be used to determine whether the percentage of supermarket shoppers who believe that the supermarket ketchup was as good as the national brand ketchup is less than 62%. Ho: P = 0.62 H₂: P = 0.62 Ho: p≥ 0.62 H₂: P 0.62 H₂: p ≤ 0.62 Ho: p ≤ 0.62 H₂: p > 0.62 (b) If a sample of 100 shoppers showed 49 stating that the supermarket and was as good as the national brand, what is the p-value? Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = (c) At a = 0.05, what is your conclusion? Do not reject Ho. There is…
- The ethnicity, gender, age, and other demographic characteristics of juries have been of great interest in some trials in the United States. When the composition of a jury does not reflect the demographic characteristics of the surrounding community, doubts about fairness of the jury selection process and legal challenges can arise. Although juries are not selected solely by chance, comparing the actual jury to the composition of juries that would occur if jurors were selected at random can tell lawyers whether there are grounds to investigate the fairness of the jury selection process. An historic case concerning jury selection, Avery v. Georgia, was brought to the U.S. Supreme Court in 1953. A jury in Fulton County, Georgia had convicted Avery, an African-American, of a serious felony. There were no African-Americans on the jury. At the time, there were 165,814 African-Americans in the Fulton County population of 691,797. The list of 21,624 potential jurors had 1,115 African-…K In a July 2017 report, a research firm stated that 39% of people from a certain region reported being harassed while online. An AP Statistics student decided to conduct her own survey at her high school of 3,260 students. She randomly selected 239 students to be surveyed and 99 of them stated that they had been harassed online. Does her survey suggest that the problem is worse at her school than it is for a typical person in the region? Determine the appropriate hypotheses. Ho P HA P (Type integers or decimals.) The test statistic is z = (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State your conclusion. Use a = 0.05. the null hypothesis. There sufficient evidence to conclude that the proportion of students in the high school who were harassed while online is the proportion of people from the region being harassed while online.Research suggests that high school students could benefit from later school starting times. A school administrative team is considering a proposal to move the starting time of the local high school one hour later than the current start time. To measure interest in the proposal, members of the team randomly select subjects attending a large soccer tournament played on the high school grounds on a Saturday morning. The team finds that 58% of those surveyed support a later high school start time. Which type of bias is most likely to be present in the survey results? O This is undercoverage bias because adults with children are more likely to be included in the sample. O This is question wording bias because the phrasing of the later start times question may be confusing to some subjects. O This is nonresponse bias because some of those selected may choose to not provide their opinion on later start times. O This is voluntary response bias because vocal supporters of later start times will…
- Stem Cell Survey Adults were randomly selected for a Newsweek poll. They were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos." Of those polled, 481 were in favor, 401 were opposed, and 120 were unsure. A politician claims that people don't really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin toss. Exclude the 120 subjects who said that they were unsure, and use a 0.01 significance level to test the claim that the proportion of subjects who respond in favor is equal to 0.5. What does the result sug- gest about the politician's claim? 2.A radio news story claimed that half of all U.S. adults have Internet access. In a national poll about Internet usage (The Pew Internet Project), 12,638 U.S. adults were surveyed and it was found that 6413 of those surveyed had Internet access. At a 5% level of significance, perform a hypothesis test to test the claim made by the radio news story. The correct conclusion is: Group of answer choices half of all U.S. adults have Internet access. less than half of all U.S. adults have Internet access. The percentage of U.S. adults that have Internet access is not one-half. more than half of all U.S. adults have Internet access.(AP statistics) which is the correct answer?
- From the U.S. Census Bureau's American Community Survey in 2019 it was found that 33.13% of United States residents over the age of 25 had an educational attainment of a bachelor's degree or higher. In the District of Columbia, the percentage of residents over the age of 25 who had attained a bachelor's degree or higher was 59.67%. An investigator for the U.S. Census Bureau took a random sample of seven residents from the District of Columbia and asked them their highest educational degree they had obtained. When there is no data set posted for an investigation, open a blank StatCrunch page by clicking "Open StatCrunch" on the StatCrunch home page. a) Verify that the sample from the District of Columbia satisfies the conditions of the binomial experiment. Write one sentence to check each requirement in context of the investigation. b) Assuming the sample from the District of Columbia is a binomial experiment, build the probability distribution in a single table and include the table in…Among college students, the proportion p who say they're interested in their congressional district's election results has traditionally been 65% . After a series of debates on campuses, a political scientist claims that the proportion of college students who say they're interested in their district's election results is more than 65%. A poll is commissioned, and 192 out of a random sample of 265 college students say they're interested in their district's election results. Is there enough evidence to support the political scientist's claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂ : H₁ :0 (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the…TOR is free and open-source web browser (https://www.torproject.org/) enabling anonymous communication. A researcher wanted to learn about how many College students have heard of the TOR web browser. She randomly selected 234 LaGuardia students and found that 21 have heard of the TOR web browser. She concluded that approximately 9% of LaGuardia students have heard of TOR. Is this an experimental or observational study? Is this an observational studyor an experiment? If it is an experiment, list the explanatory and response variables. If it is an observational study, list the sample and the population. State the research question of this study. If it is an experiment, list the explanatory and response variables. If it is anobservational study, list the sample and the population.