A candidate for the election made a speech in city A but not in B. A sample of 500 voters from city A showed that 59.6% of the voters favored him, whereas a sample of 300 voters from city B showed that 50% favored him. Discuss whether his speech could produce any effect on voters in city A. Use a 5% level
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A candidate for the election made a speech in city A but not in B. A sample of 500 voters from city A
showed that 59.6% of the voters favored him, whereas a sample of 300 voters from city B
showed that 50% favored him. Discuss whether his speech could produce any effect on
voters in city A. Use a 5% level
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- What does an experiment have that an observation does not have? A means to gather data Medicine A relationship A treatmentThe manager of a theater that is open to residents of two towns, A and B, wants to know if the proportion of households from A that use the library is smaller than the proportion of households from B. In order to test this, the manager asks 45 households in A and 49 households in B whether anyone in their household had used the theater last summer. 23 of the households surveyed in A responded "yes", and 35 of the households in B responded "yes". Find the p-value that would be used to make a conclusion for this hypothesis test.Sally is interested in finding out if the political party affiliation of Americans who are registered to vote is related to whether or not they believe in ghosts. Suppose she finds that, among all Americans who are registered to vote, 29.529.5% are registered Democrats and 24.624.6% are registered Republicans. Among all registered American voters, the percent of people who are Democrat and who believe in ghosts is 7.87.8%, the percent of people who are Republicans and who believe in ghosts is 6.56.5%, and the percent of people who affiliate with other political parties and who believe in ghosts is 12.112.1%. Label each branch of the tree diagram with the correct probability value. Answer Bank 0.121 0.181 0.459 0.922 0.264 0.736 0.078 0.217 0.879 0.246 0.935 0.295 0.065
- In 2003 and 2017 a poll asked Democratic voters about their views on the FBI. In 2003, 45% thought the FBI did a good or excellent job. In 2017, 74% of Democratic voters felt this way. Assume these percentages are based on samples of 1300 Democratic voters. Complete parts (a) through (d) below. a. Can we conclude, on the basis of these two percentages alone, that the proportion of Democratic voters who think the FBI is doing a good or excellent job has increased from 2003 to 2017? Why or why not? A. No. Although a lesser percentage is present in the sample, the population percentages could be the same or even reversed. B. No. Although a lesser percentage is present in the sample, the population percentages could be the same, but could not be reversed. C. No. Since a greater percentage is present in the sample, we cannot conclude that a lesser percentage of Democratic voters who think the FBI is doing a good or excellent job is present in the population. D. Yes. Since a lesser…The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What kind of test will you need to perform? A A right, one-tailed z-test B A left, one-tailed z-test C A two-tailed z- testThe rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What are the hypotheses? A Null: p=0.95 Alternate: p=0.95 B Null: p=0.95 Alternate: p<0.95 C Null: p=0.95 Alternate: p>0.95 D Null: p=0.55 Alternate: p =/ 0.95
- The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What is the probability of Z OBT being more than alphs? (round to the nearest hundredth)The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. . What is the Z CRIT? A + 1.96 B + 1.645 C - 1.96 D - 1.645The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. Do you retain or reject the null hypothesis? Retain the null. Reject the null.
- The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What is the zcrit?The Las Vegas Review-Journal (R-J) posts an article on their website reporting on a poll they conducted for the upcoming Senate election. Their poll asked likely Nevada voters who they intend to vote for. The results were: Catherine Cortez Masto with 45%, Adam Laxalt with 41%, 14% undecided, and they report that their poll has a +/- 3.5 percentage point margin of error. The article's headline is "Cortez-Masto Leads Laxalt by 4 Points." Is the R-J right? That is, can we be reasonably sure (95% confident) that Cortez-Masto really is ahead of Laxalt? if we had the raw data we could just load it into R and do a quick difference of means test, but we don't need the actual data to figure it out in this case. In your answer, address the following: (1) Is the R-J probably right that Cortez-Masto leads Laxalt? (2) how you came to that conclusion?If 40% of candidates for the soccer team pass the fitness test, and only 30% of all athletes are soccer team candidates who pass the test, what percentage of the athletes are candidates for the soccer team?