What is the lower bound AND upper bound of the 95% confidence interval for the slope of the regresison line?
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What is the lower bound AND upper bound of the 95% confidence interval for the slope of the regresison line?
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- According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. A) Verify that nP0(1-P0)>10 and n< 0.05N (Assume the population sizes is N=40 million) B) State the appropiate null and alternative hypotheses. C) Indicate whether the hypothesis is left, right, or two- tailed.According to the Pew Research Center,on the propotion of the American population who use only a cellular telephone (landline) is 0.37. Jason conducts a survey of one hundred fifty 20 to 24 year olds who live on their own and finds that 73 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20 to 24 year olds who live on their own and don't have a landline is greater than 0.37? Use a=0.10 level of significance. D) Compute the test statistic z0. Round to the nearest hundredth. E) Draw a normal model with the area that represents the P-value shaded. F) Determine and interpret the P-value. What is the conclusion of the hypothesis test?In an attempt to document the percentage of teenagers in the United States who play video games for more than 4 hours per day, the group Concerned Citizens for Teenage Welfare surveyed 2,000 teenagers randomly selected from across the United States. It was discovered that 33% of teenagers surveyed play video games for more than 4 hours per day. Concerned Citizens for Teenage Welfare released a statement saying: "If you are the parent of the 33% of teenagers in America who play video games for more than 4 hours per day, you should consider engaging your teen in at least one other activity per day." What does the Concerned Citizens for Teenage Welfare statement represent? a It represents the random sample. b It represents the population parameter. c It represents the sample statistic. d It represents an inference about teenagers in the United States.
- Judge Disposed Appealed Reversed Court Fred Cartolano 3037 137 12 Common Thomas Crush 3372 119 10 Common Patrick Dinkelacker 1258 44 8 Common Timothy Hogan 1954 60 7 Common Robert Kraft 3138 127 7 Common William Mathews 2264 91 18 Common William Morrissey 3032 121 22 Common Norbert Nadel 2959 131 20 Common Arthur Ney Jr. 3219 125 14 Common Richard Niehaus 3353 137 16 Common Thomas Nurre 3000 121 6 Common John O'Connor 2969 129 12 Common Robert Ruehlman 3205 145 18 Common J. Howard Sundermann Jr. 955 60 10 Common Ann Marie Tracey 3141 127 13 Common Ralph Winkler 3089 88 6 Common Total 43945 1762 199 -- Penelope Cunningham 2729 7 1 Domestic Patrick Dinkelacker 6001 19 4 Domestic Deborah Gaines 8799 48 9 Domestic Ronald Panioto 12970 32 3 Domestic Total 30499 106 17 -- Mike Allen 6149 43 4 Municipal Nadine Allen 7812 34 6 Municipal Timothy Black 7954 41 6 Municipal David Davis 7736 43 5 Municipal Leslie Isaiah Gaines 5282 35 13…The Accountability Office is auditing Star International Airways, which flies numerous charters. The Titan contract specifies that the average flight may be no more than 15 minutes late. A sample of 20 flights reveals the results below: Flights and Their Delay Status Flight Number Status 217 On time 167 20 minutes late 133 17 minutes late 207 64 minutes late 219 On time 457 96 minutes late 371 30 minutes late 612 On time 319 6 minutes late 423 12 minutes late 684 11 minutes late 661 61 minutes late 511 On time 536 On time 493 17 minutes late 382 12 minutes late 115 6 minutes late 107 3 minutes late 19 26 minutes late 123 19 minutes late The newly hired junior analyst, Bob, is requested to write a memo interpreting this information. Bob finds that he needs a good grasp of statistical inference to write the memo. He researches statistical inference and…Whattheareaofthefigurewhatthehelldj
- A company studied the number of lost-time accidents occurring at its brownsville,Texas, plant. historical records show that 6% of the employees suffered lost-time accidents last year. Management believes that a special safety program will reduce suchaccidents to 5% during the current year. In addition, it estimates that 15% of employeeswho had lost-time accidents last year will experience a lost-time accident during thecurrent year.a. What percentage of the employees will experience lost-time accidents in bothyears?The Los Angeles City Controller's office calculated that in 2013, the city employed 4703047030 full‑time employees and 1014210142 part‑time employees. Assume that an outside advocacy group had been lobbying the Mayor's office to convert part‑time workers into full‑time workers throughout 2014. The Controller's office makes its calculations annually. Suppose that the outside advocacy group wanted to know the proportion of city employees (excluding per‑event employees) who are full‑time employees ?p in June 2014 to gauge if their lobbying efforts had been effective. Suppose that the group surveyed a random sample of 1000 city employees (excluding per‑event employees) in June 2014 and found that 845845 were full‑time employees and 155155 were part‑time employees. If the advocacy group planned to use a one‑sample z-z-test for a proportion to test their lobbying eforts, the appropriate null hypothesis would be and the appropriate alternative hypothesis would be Assume…According to the American Management Association, most U.S. companies now test at least some employees and job applicants for drug use. The U.S. National Institute on Drug Abuse claims that about 15% of people in the 18-25 age bracket use illegal drugs. Allyn Clark, a 21 year-old college graduate, applied for a job at the Acton Paper Company, took a drug test, and was not offered a job. He suspected that he might have failed the drug test, even though he does not use drugs. In checking with the company's personnel department, he found that the drug test has 99% sensitivity, which means that only 1% of drug users incorrectly test negative. Also, the test has 98% specificity, meaning that only 2% of nonusers are incorrectly identified as drug users. Allyn felt relieved by these figures because he believed that they reflected a very reliable test that usually provides good results. But is this really true? The accompanying table shows data for Allyn and 1,499 other job applicants. Based…
- Theaveragestartingsalaryforthisyear'sgraduatesatalargeuniversity(LU)is$20,000withastandarddeviationof$8,000.Furthermore,itisknownthatthestartingsalariesarenormallydistributed.a.WhatistheprobabilitythatarandomlyselectedLUgraduatewillhaveastartingsalaryofatleast$30,400? b.WhatistheprobabilitythatarandomlyselectedLUgraduatewillhaveasalaryofexactly$30,400? &.Individualswithstartingsalariesoflessthan$15600receivealowincometaxbreak.Whatpercentageofthegraduateswillreceivethetaxbreak? d.If189oftherecentgraduateshavesalariesofatleast$32240,howmanystudentsgraduatedthisyearfromthisuniversity?Theaveragestartingsalaryforthisyear'sgraduatesatalargeuniversity(LU)is$20,000withastandarddeviationof$8,000.Furthermore,itisknownthatthestartingsalariesarenormallydistributed. a.WhatistheprobabilitythatarandomlyselectedLUgraduatewillhaveastartingsalaryofatleast$30,400? b.WhatistheprobabilitythatarandomlyselectedLUgraduatewillhaveasalaryofexactly$30,400? c.Individualswithstartingsalariesoflessthan$15600receivealowincometaxbreak. Whatpercentageofthegraduateswillreceivethetaxbreak? d.If189oftherecentgraduateshavesalariesofatleast$32240,howmanystudentsgraduatedthisyearfromthisuniversity?4. Younoticeinyourintroductorypsychologyclassthatmorewomentendtositupfront,andmoremensitintheback.Todeterminewhetherthisdifferenceissignificant,youcollectdataontheseatingpreferencesforthestudentsinyourclass.Thedatafollows: men women front of room 15 27 back of room 32 19 a. Whatisχ2obt? b. Whatisdfforthistest? c. Whatisχ2cv? d. Whatconclusionshouldbedrawnfromtheseresults