A court holds jurisdiction over five counties, and the juries are required to be made up in a representative manner from the eligible populations of these five counties. An investigator notices that the county where she lives has 14% of the total population of the five counties eligible for jury duty, yet records reveal that over the past five years only 122 out of the 1386 jurors used by the court reside in her county. Run a hypothesis test to determine if this constitutes reasonable evidence that the jurors are not being randomly selected from the total population. What is the p-value of the test?
Q: Alcohol abuse has been described by college presidents as the number one problem on campus, and it…
A: We have given that, Sample size (n) = 10904 and favorable cases (X) = 2486 Then,
Q: A high school counselor wishes to test the theory that the average age of the dropouts in his school…
A: Here the high school Counselor wishes to test the theory that the average age of dropouts in his…
Q: Calculate the conditional distribution of Facebook use for each campus setting.
A: The Pennsylvania State University has its main campus in the town of State College and more than 20…
Q: 1' (a) State the null hypothesis Ho and the alternative hypothesis H,. Ho H, :0 (b) Determine the…
A: It is given that Sample size n = 275 Number of successes, X = 221 Level of significance = 0.01 Note…
Q: Among college students, the proportion p who say they're interested in their congressional…
A: From the provided information, Sample size (n) = 270 From which 195 say they're interest in their…
Q: If we have a statistical community with only six vocabulary, and you need to choose a sample of only…
A: Given that, in a statistical community there are six vocabulary and we need to choose three sample…
Q: Wind Mountain is an archaeological study area located in southwestern New Mexico. Potsherds are…
A: Given: The data on three different sites is provided: Site I Site II Site III 62 26 30 22 61…
Q: Among college students, the proportion p who say they're interested in their congressional…
A: Claim: the proportion of college students who say they're interested in their district's election…
Q: A librarian would like to determine whether a new book appeals more to adults or to children. The…
A: Independent samples:Two samples are independent if the sample values selected from one population…
Q: A fall survey of 2 and 4 year college students showed that of 167,000 students who responded, 65,130…
A:
Q: Historians are interested in the accuracy of eyewitness accounts of traumatic events. One study…
A: As per honor code, we will only answer first three parts. n = 20 x(Breaking apart) = 15 x(Intact) =…
Q: ownership varies across age groups. Suppose that the estimated percentage of people who own at least…
A:
Q: The characteristics of check teeth (e.g., molars) can provide anthropologists with information on…
A: The data on degree of wear of 18 check teeth is given.
Q: A researcher wants to estimate the percentage of adults in Georgia that have not graduated from high…
A: As we know Statistics represents sample and Parameter represents population.
Q: A survey conducted five years ago by the health centre at a university showed that 18% of the…
A:
Q: Based on a combination of worldwide surveys conducted from 2008 to 2010 and reported at gallup.com,…
A: According to the given data, 71% people prefer to move. Total population=1000000 Number of people…
Q: Manatees are large aquatic mammals found primarily in the rivers and estuaries of Florida. Because…
A: Population is the complete set of people or objects with certain common characteristics under the…
Q: Plates are evaluated according to their surface finish, and placed into four categories: premium,…
A: State the test hypotheses. Null hypothesis: H0:p1=0.10,p2=0.70,p3=0.15,p4=0.05 Alternative…
Q: Students in a statistics class at Penn State were asked, “About how many minutes do you typically…
A: 1) The assumptions necessary for performing the two-sample t-test, such that the results obtained…
Q: Historians are interested in the accuracy of eyewitness accounts of traumatic events. One study…
A: Null and alternative hypotheses: The investigator is interested to test whether there was an equal…
Q: The President of the University of Michigan would like to know more about students on campus. He…
A:
Q: A state fisheries commission wants to estimate the number of bass caught in a given lake during a…
A: Let Y denote the seasonal catch for a lake Let X denote the size of lake The given R-output is,…
Q: A researcher claims that the percentage of voters that favor voting via absentee ballot is 35%.…
A: It is given that the researcher claims that the percentage of voters that favor voting via absentee…
Q: A study published in the American Journal of Public Health was conducted to determine whether the…
A: From the given information we calculate chi squared test statistics.
Q: A transportation engineer at OSU conducts a study on bus ridership to the 14th and Monroe bus stop…
A: Systematic sampling: Systematic sampling involves of first considering a starting point for…
Q: Historians are interested in the accuracy of eyewitness accounts of traumatic events. One study…
A: Scales of measurement are a classification of variables. It is bases on the type of information each…
Q: A certain company will purchase the house of any employee who is transferred out of state and will…
A: (a)
Q: (b) Find the test statistic z and the p-value for testing the hypotheses of part a. Use the p-value…
A: Given that 25 out of the 140 house owners definitely would buy the security system, while 9 out of…
Q: Among college students, the proportion p who say they're interested in their congressional…
A: n=265x=192
Q: Consider the following hypothe Home Games Away Games basketball records for college A and college B.…
A: Percentage = ( game won/ total game played)×100
Q: certain company will purchase the house of any employee who is transferred out of state and will…
A: From the given data we conduct paired t test.
Q: A certain company will purchase the house of any employee who is transferred out of state and will…
A: (a) The provided table can be tabulated as: The alternative hypothesis suggests that the test is…
Q: Alcohol abuse has been described by college presidents as the number one problem on campus, and it…
A:
Q: On election day, a local TV news organization stayed at three polling locations in Fairfield county…
A: Given: The total number of votes for candidate A in the election for the US Senate seat are n=2790.…
Q: Among college students, the proportion p who say they’re interested in their congressional…
A: From the provided information, Sample size (n) = 250 From which 180 students say they’re interested…
Q: Camden County judges try thousands of cases per year. In an overwhelming majority of the cases…
A: Given information: The data represents the values of the variables Disposed, Appealed, reversed for…
Q: The president of Doerman Distributors, Inc., believes that 35% of the firm's orders come from…
A: From the provided information, n = 100, p = 0.35
Q: Historians are interested in the accuracy of eyewitness accounts of traumatic events. One study…
A: Proposed analysis: The investigator is interested to test whether there was an equal likelihood of…
Q: Among college students, the proportion p who say they're interested in their congressional…
A: Sample size n = 275X = 199Significance level = 0.01 Claim : political scientist claim that…
Q: Among college students, the proportion p who say they're interested in their congressional…
A: A) first of all we have to construct null and alternative hypotheses as followswe know that null…
Q: Two hundred students were sampled in the College of Engineering. It was found that: 137 take math,…
A:
Q: A certain company will purchase the house of any employee who is transferred out of state and will…
A:
Q: Among students at a nearby college, the proportion who say they’re interested in their congressional…
A:
Q: According to Pew Research Center surveys, 79% of U.S. adults were using the Internet in January 2011…
A:
Q: A state fisheries commission wants to estimate the number of bass caught in a given lake during a…
A: Given that A state fisheries commission wants to estimate the number of bass caught in a given lake…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- A certain company will purchase the house of any employee who is transferred out of state and will handle all details of reselling the house. The purchase price is based on two assessments, one assessor being chosen by the employee and one by the company. Based on the sample of eight assessments shown, do the two assessors agree? Use the .05 level of significance. Assessments of Eight Homes ($ thousands) Assessed by Company Employee Home 1 Home 2 Home 3 Home 4 Home 5 Home 6 Home 7 Home 8 325 345 455 279 292 281 539 747 312 350 480 287 304 284 521 770 picture Click here for the Excel Data File (a) Choose the appropriate hypotheses. Assume d= company assessed value – employee assessed value. Ho: Hd = 0 versus H: Hd # 0. Ho: Hd +0 versus H: Hd = 0. (b) State the decision rule for .05 level of significance. (Round your answers to 2 decimal places. A negative value should be indicated by a minus sign.) Reject the null hypothesis if tealc 2.36 (c-1) Find the test statistic tealc- (Round your…An art authenticator has a history of successfully identifying forgeries. Over her career, she has been asked to evaluate 74 actual forgeries and correctly identified 69 of them. Further, among all the authentic art she has looked at, she has never claimed any to be forgeries. An art dealer is considering purchasing a painting but is worried it is a fake. His experience in the field over the years indicates about 3% of the artwork he comes across is forged. a) If the dealer employs the services of the authenticator, and she indicates the painting is genuine, what is the chance it is actually a forgery? b) Without authentication, the dealer can sell the painting for $20,000. The price would increase to $25,000 if the painting were authenticated as genuine, but obviously it is worthless if it is deemed a forgery. The authenticator charges $2,000 for her services. Do you think it is worth it for the dealer to use the authenticator? Why or why not?The Pew Research Center Internet Project, conducted on the 25th anniversary of theInternet, involved a survey of 857 Internet users (Pew Research Center website, April 1,2014). It provided a variety of statistics on Internet users. For instance, in 2014, 87%of American adults were Internet users. In 1995 only 14% of American adults used theInternet.a. The sample survey showed that 90% of respondents said the Internet has been a goodthing for them personally. Develop a 95% confidence interval for the proportion ofrespondents who say the Internet has been a good thing for them personally.
- According to a recent census, 15% of the people in the United States are of Hispanic origin. One county supervisor believes her county has a different proportion of Hispanic people than the nation as a whole. She looks at their most recent survey data, which was a random sample of 435 county residents, and found that 40 of those surveyed are of Hispanic origin. This is a one-proportion z test. Answer the following: A. ) The 435 residents were a random sample from the county of interest. The sample size is more than 100. One expects np0=(?) successes and nq0=(?) failures, which are both more than 10. B.) The 435 residents were a random sample from the county of interest. 435 is likely less than 10% of the population of a county. One expects np0=(?) successes and nq0=(?) failures, which are both more than 10. C.) The 435 residents were a random sample from the county of interest. The standard deviation of p is less than 0.5. One expects np0=(?) successes and…In recent years, many states have enacted tougher voter identification laws requiring a government issued photo ID. Proponents claim that these laws are necessary to reduce voter fraud. Opponents claim that voter fraud is rare and that since as many as 11% of eligible voters do not have the required identification, these tougher laws will discourage millions of minorities and low-income Americans from voting. The Washington Post conducted a national poll (July 7-19, 2012) and found that 1558 out of 2064 adults supported the tougher voter ID laws. 1)Construct a 95% confidence interval for the proportion of adults who approve of tougher voter ID laws. Document your work in the space provided below. Document how you computed the margin of error and the confidence interval in the space provided below. Round all numbers to 4 decimal places. 2)Is it likely that three-fourths of adults approve of these new laws?According to the National Center for Education Statistics, 43% of the college students work full time. A survey of 900 randomly selected college students is to be conducted. For such groups of 900, would it be unusual to get 735 college students who work fulltime?
- A meat-processing company in Alberta produces and markets a package of eight small sausage sandwiches. The product is nationally distributed, and the company is interested in knowing the average retail price charged for this item in stores across the country. The company cannot justify a national census to generate this information. Based on the company information system’s list of all retailers that carry the product, a company analyst contacts 36 of these retailers and ascertains the selling prices for the product. Use the following price data and a population standard deviation of 0.113 to determine a point estimate for the national retail price of the product. Construct a 98% confidence interval to estimate this price. $2.23 $2.11 $2.12 $2.20 $2.17 $2.10 2.16 2.31 1.98 2.17 2.14 1.82 2.12 2.07 2.17 2.30 2.29 2.19 2.01 2.24 2.18 2.18 2.32 2.02 1.99 1.87 2.09 2.22 2.15 2.19 2.23 2.10 2.08 2.05 2.16 2.26A random survey of health issues, conducted by the Department of Public Health of the Commonwealth of Massachusetts, examined the results from the state's seven largest cities. These cities were selected on the basis of their diverse racial and ethnic populations. The percentage of adults with diabetes in each city in the survey is given in the following table. City Boston Worcester Springfield Lowell Fall River Lawrence NewBedford Adults withDiabetes (%) 4.2 5.2 9.1 5.7 8.1 7.9 6.3 Find the average percentage of adults with diabetes in these seven cities. (Round your answer to two decimal places.) %What is the standard deviation for these data? (Round your answer to two decimal places.) %A municipality’s local election board claims that 25% of registered voters typically cast ballots in annual school board elections. The local school board believes this percentage of participating voters is, in reality, much lower. What is the population parameter under consideration? What hypotheses should the local school board test in this situation?
- Two pieces of information were gathered from 1212 randomly selected cities in the United States: the number of persons owning registered firearms and the murder rate. It was observed that cities with more registered firearms tended to have higher murder rates. Part A: Which is the population of interest in this study? People who own registered firearms in the United States Cities in the United States People who live in U.S. cities People who were murdered in the United States Part B: Which is the sample in this study? People who live in the 121U.S. cities People who own registered firearms in the 12 U.S. cities 12 cities in the United States People who were murdered in the 12 U.S. cities Part C: What type of study is this? A census, because it uses data from the entire population A statistical study, because it uses data from a sample Part D: Which of the following was not a variable observed in this study? The number of registered firearms in a given city Murder…Based on market sales figures, approximately 7.9% of car owners in California own an electric or plug-in hybrid vehicle (EV). A marketing director at a local car dealership would like to know if their sales of EV's is any greater than what the state's sales proportions are. To examine this, they look over the last 500 sales (which they consider to be a representative sample of all car sales) and determine that 10.4% of those were EV sales. Is this statistically significant evidence that the dealership sells a higher proportion of EV's than the overall state's proportion? Which of the following are the correct null and alternative hypotheses for the hypothesis test used to determine significance? Ho:p = 0.079 Haip > 0.079 %3D O Ho:p = 0.079 Hai p > 0.104 O Ho:p 0.079 O Ho:p 0.104