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.

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.