Statistics question and answers for August 31, 2023
- Q Consider the following random sample observations on stabilizedviscosity of asphalt specimens.2081 1977 2037 1842 2074Suppose that for a particular application, it is required thattrue average viscosity be 2000. Is there evidence this requirementis not...
- Q 2-1- Based on Initial Observation values, calculate themean and standard deviation of the data. (You need to showyour calculation for standard deviation calculation). Thencalculate the Cp and Cpk of the...
- Q In what ways do advertisers in magazines use sexual imagery toappeal to youth? One study classified each of 1509 full-page orlarger ads as "not sexual" or "sexual," according to the...
- Q We assume that our wages will increase as we gain experience andbecome more valuable to our employers. Wages also increase becauseof inflation. By examining a sample of employees at a...
- Q A population of values has a normal distribution with?=139.8?=139.8 and ?=23?=23. You intend to draw a random sample ofsize n=12n=12.Find the probability that a single randomly selected value isgreater than...
- Q An investigator wishes to conduct a test of the effect ofalcohol consumption on the performance of automobile drivers,possibly to gain more information about the legal maximum for DUIarrests. Before the...
- Q Hamilton County judges try thousands of cases per year. In anoverwhelming majority of the cases disposed, the verdict stands asrendered. However, some cases are appealed, and of those appealed,some of...
- Q In a survey of women in a certain country? (ages 20minus?29),the mean height was 64.9 inches with a standard deviation of 2.81inches. Answer the following questions about the specified normaldistribution....
- Q A basketball team sells tickets that cost? $10, $20,? or, forVIP? seats,? $30. The team has sold 3401 tickets overall. It hassold 176more? $20 tickets than? $10 tickets. The total...
- Q Academic drops have been a concern for university administrationdue to the negative impact they have on graduation rates andconsequently the image of the university.The Management Department has collected the data...
- Q astudy was conducted to investigate the effectiveness of acupuncturein reducing pain.
- Q Use the data on lettuce yields in Exercise 2.2.Treatment (lb N/acre)Head of lecture/plot01041149014050134130144174100146142152156150147160160163200131148154163Compute the analysis of variance for the datDetermine the best polynomial response function that describesthe relationship between lettuce...
- Q Bay Street securities firms paid out record year-end bonuses of$130,500 per employee for 2014. Suppose we would like to take asample of employees at the Roy-West securities firm to see...
- Q The big idea behind hypothesis testing is that we have anassumption about reality, and we see if the data fits thatassumption. The whole process gets complicated by all the notationand...
- Q Sampling Distribution. To commemorate Facebook’s 10-yearmilestone, Pew Research reported several facts about Facebookobtained from its Internet Project survey. One was that the averageadult user of Facebook has 338 friends. This...
- Q Sophia who took the Graduate Record Examination (GRE) scored 157on the Verbal Reasoning section and 162 on the QuantitativeReasoning section. The mean score for Verbal Reasoning section forall test takers...
- Q Consider the following. (Give your answers correct totwo decimal places.)(a) Calculate the value for the test statistic,?2, for Ho:?2 = 20.5, n = 16,s2 = 16.5.?2* =(b) Calculate the value...
- Q Sarah claims that her “miracle bait” is a more effective lurefor panfish than the old- fashioned lure that Bill uses. Sarah andBill went on 12 fishing expeditions in the same...
- Q what are the pros and con of frequency table, bargraph, histogram, pie graph, steam leaf display, dot plot,pictogram, frequency polygon, box plot, pareto graph
- Q ^IT’s a two step question !*Step1An economy’s AD (Aggregate Demand) function is Y = 1000 – 2Pand AS (Aggregate Supply) function is P = 20 + 0.1Y. Show these twolines...
- Q Suppose that Teeny Weeny Airlines (TWA) operates a very smallflight from Charleston to Bermuda with only five seats available onthe aircraft. They're interested in determining whether they shouldfollow the lead...
- Q What are some key differences between college level academicwriting and writing an email to a friend?
- Q A doctor wants to estimate the mean HDL cholesterol of all? 20-to? 29-year-old females. How many subjects are needed to estimatethe mean HDL cholesterol within 3 points with 99 %...
- Q Let X be a random variable. Suppose X ? Exp(0.5). The area underthe pdf of the Exp(0.5) distribution above the interval [0, 2] is0.6321. What is the value of the...
- Q A study is planned on the physiologyof exercises with human subject volunteers. The two treatments inthe study are two methods of aerobic exercise training (call themethods A and B). At...
- Q In a study of obesity the following results were obtained fromsamples of males and females between the ages of 20 and 75:n Number OverweightMales 150 21Females 200 48Can we conclude...
- Q 1. The grades on a chemistry midterm at Springer are roughlysymmetric with ?=67 and ?=2.0. William scored 66on the exam.Find the z-score for William's exam grade. Round to twodecimal places.What...
- Q Jacob Jones is the manager of theproduce section at Snell’s grocery store. Jacob must determine eachday how many pounds of bananas to order from the supplier. Demandvaries somewhat from day...
- Q The accompanying data represent the total travel tax? (indollars) for a? 3-day business trip in 8 randomly selected cities.A normal probability plot suggests the data could come from apopulation that...
- Q As part of a? survey, a marketing representative asks a randomsample of 29 business owners how much they would be willing to payfor a website for their company. She finds...
- Q Forgetting about the actual procedures, give me an example ofreal-world research question that would(a) use a one-sample t-test(b) use a two-sample t-test
- Q a research center base in Canada used data sample of 25university that over degree programme to investigate the nature ofrelationship between annual salaries of graduates Y and annualtuition fees X...
- Q Two types of medication for hives are being tested. Themanufacturer claims that the new medication B is more effectivethan the standard medication A and undertakes a comparison todetermine if medication...
- Q Graphically solve the following problem. You need not show methe graph. However, you would need to draw one to solve the problemcorrectly. You would need to indicate all the corner...
- Q According to the 2016 CCSSE data from about 430,000 communitycollege students nationwide, about 13.5% of studentsreported that they “often” or “very often” come to class withoutcompleting readings or assignments.Are the...
- Q Develop a random number generator for a Poisson distributionwith mean = 10. Generate five values manually with a random numbertable. Please show work.
- Q Perform the appropriate hypothesis test for the problem. Statethe hypotheses, identify the claim, compute the test statistic andP-value, make a decision, and write the interpretation in terms ofthe claim. For...
- Q Engineers concerned about a tower's stability have doneextensive studies of its increasing tilt. Measurements of the leanof the tower over time provide much useful information. Thefollowing table gives measurements for...
- Q According to a survey in a? country, 39?% of adults do not own acredit card. Suppose a simple random sample of 200 adults isobtained. Complete parts? (a) through? (d) below....
- Q A presidential candidate wants to test the null hypothesis thatshe has the same support rate in Virginia and in Maryland. In arandom sample from Virginia, 307 among 642 asked would...
- Q As part of an investment firm, you have been asked to researchpotential companies for the firm to invest in. Specifically, youare interested are interested in identifying the factors thatinfluence a...
- Q The weights of 3 randomly selected mattresses were found to havea standard deviation of 4.53. Construct the 95%confidence interval for the population standarddeviation of the weights of all mattresses in...
- Q Perform the appropriate hypothesis test for the problem. Statethe hypotheses, identify the claim, compute the test statistic andP-value, make a decision, and write the interpretation in terms ofthe claim. For...
- Q A radar unit is used to measure the speed of cars on a highwayduring rush hour traffic. The speeds of individual cars arenormally distributed with a mean of 55 mph...
- Q A fair 6-sided die is rolled repeatedly. (a) Find the expectednumber of rolls needed to get a 1 followed right away by a 2. Hint:Start by conditioning on whether or...
- Q A cell with a radius of 1 µm has an exponential growth rate of0.5 d-1, based upon assimilation of glucose. A cell with a verysimilar genome and metabolism and a...
- Q In the 1920s, about 97% of U.S. colleges and universitiesrequired a physical education course for graduation. Today, about40% require such a course. A recent study of physical educationrequirements included 352...
- Q A consumer preference study compares the effects of three differentbottle designs (A, B, and C) on sales ofa popular fabric softener. A completely randomized design isemployed. Specifically, 15 supermarkets of...
- Q Please write in BOLD Thanks :)In Lesson Eight you've learned how to construct confidenceintervals for population parameters and proportions, based on datafrom samples.In a short paragraph, distinguish between Sampling Error...
- Q The Salem Board of Education wants to evaluate the efficiency ofthe town’s four elementary schools. The three outputs of theschools are? output 1 = average reading score? output 2 =...
- Q Let x be a random variable that represents the level ofglucose in the blood (milligrams per deciliter of blood) after a 12hour fast. Assume that for people under 50 years...
- Q Thirty-one small communities in Connecticut (population near10,000 each) gave an average of x = 138.5 reported casesof larceny per year. Assume that ? is known to be 44.5cases per year.(a)...
- Q you draw a single card from a standard 52-card deck. find theprobability of each event. simplify the probability ratio or writein decimal form. a) ace or a nine b) not...
- Q The major stock market indexes had strong results in 2014. Themean one-year return for stocks in the S&P 500, a group of 500very large companies was +11.4%. The mean one...
- Q •Example: A manager of a liquor store believesthat the proportions of customers preferring CURES Beer, HAMMERKILLBeer, and MULER Beer are 40%, 30% and 30% respectively. Thefollowing results were obtained from...
- Q You are given the returns for the following three stocks:ReturnYearStock AStock BStock C18%7%-22%28%15%35%38%3%15%48%12%3%58%3%9%Calculate the arithmetic return,geometric return, and standard deviation for each stock. Do younotice anything about the relationship between...
- Q A school psychologist wishes to determine whether a newanti-smoking film actually reduces the daily consumption ofcigarettes by teenage smokers. The mean daily cigarette consumptionis calculated for each of eight teenage...
- Q Directions Use the Crosstabs option in the Descriptives menu toanswer the questions based on the following scenario. (Be sure toselect Chi-square from the Statistics submenu and Observed,Expected, Row, and Column...
- Q A school tracks the absences of pupils as part of a flusurveillance system. Regular reporting of absences among 29students in grade 1 are taken, and based on these data, thelong-run...
- Q The retailing manager of a supermarket chain wants to determinewhether product location has any effect on the sale of pet toys.Three different aisle locations are considered: front, middle, andrear. A...
- Q two card are drawn simultaneously from card pack of 52 ; findmean and variance of the number of kings . according to BINOMIALDISTRIBUTION .1) with replacement2)without replacement
- Q Iron levels follow a normal distribution and you can easily use theempirical rule with them. consider iron levels in a population thathave a mean of 15.5gdl and a standard deviation...
- Q Table 2.5 (page 109) gives data on the true calories in 10 foodsand the average guesses made by a large group of people. Exercise2.26 explored the influence of two outlying...
- Q You are in charge of pricing for a California wine company.Because nearly 90% of U.S. wines are produced in California, youthink that California wines might be perceived differently fromthose produced...
- Q The Wall Street Journal reported that 33% of taxpayers withadjusted gross incomes between $30,000 and $60,000 itemizeddeductions on their federal income tax return. The mean amount ofdeductions for this population...
- Q Use the dataset and the predicted regression equation tocalculate the expected value of Y for each known value of X. Then,use this information to calculate the standard error of estimate.Round...
- Q Development of the world population between 1960 and 2005.YEARPOPULATION (in millions)19603019196533471970369819754084198044481985484419905292199556742000604520056465Based on the data, construct a linear regression model M inwhich the population of the globe is explained over time....
- Q An investigation of the properties of bricks used to linealuminum smelter pots was published in an article. Six differentcommercial bricks were evaluated. The life span of a smelter potdepends on...
- Q Use the distribution below to test that Peanut M&Ms followthe stated distribution. Discuss your choice of ?. Would adifferent ? have changed your conclusion?M&M states the following distribution for Peanut...
- Q Use calculator or Excel to solve the following problems.DO NOT USE MINITAB (except e). Do NOT use Excel built-in functionsor solvers (except t.inv() and f.inv() to obtain critical t and...
- Q The mean playing time for a large collection of compact discs is37 minutes, and the standard deviation is 4 minutes.(a)What value (in minutes) is 1 standard deviation above the mean?One...
- Q According to a recent report, it was found that 50.3% ofresidents in Cuyahoga County, Ohio are registered to vote. Which ofthe following is more likely?Select one:A) We take a random...
- Q The Relationship Between State Agencies and NonprofitOrganizations Introduction The relationship between governmentagencies and nonprofit organizations is the focus of increasingattention within the public administration community. Practitionersrecognize that the organization of...
- Q Theprosecutor's fallacy is misunderstanding or confusion of twodifferent conditional probabilities: (1) the probability that adefendant is innocent, given that forensic evidence shows a match;(2) the probability that forensics shows a...
- Q Please refer to the question from textbook Stats: Data andModels 4th Edition, Chapter 4, Exercises, Section 4.5 Chapterexercises #22 Camp Sites, part (b): How many parks would youclassify as outliers...
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