Statistics question and answers for August 14, 2023
- Q Students in the senior capstone course (N = 36) at UniversityUptight took the Political Science subtest developed by theNational Bored Testing Association. The test is a 75-item,multiple-choice test covering all...
- Q A researcher investigated the effectsof green and red light on the growth rate of beanplants.  The table below summarizes the heights (ininches) of bean plants from soil to first branchingstem.  LightSample MeanSample...
- Q Beer and Diapers: There is a popular story(among data miners) that there is a correlation between men buyingdiapers and buying beer while shopping. A student tests this theoryby surveying 160...
- Q Complete parts​ (a) through​ (h) for the data below.x- 40, 50, 60, 70, 80y-62, 58, 55, 47, 33B) Find the equation of the line containing the points (50, 58)and (80,...
- Q Assume the population distribution is normally distributed, theweights (in 1000 grams) of a random sample of 10 boxes of cerealare:10.2 10.1 10.1 9.7 10.3 9.8 9.9 9.8 10.4 10.3(a) Find...
- Q 2. Let X be a uniform random variable over the interval (0, 1).Let Y = X(1-X). a. Derive the pdf for Y . b. Check the pdf youfound in (a)...
- Q Applying the Central Limit Theorem: The amount ofcontaminants that are allowed in food products is determined by theFDA (Food and Drug Administration). Common contaminants in cow milkinclude feces, blood, hormones,...
- Q An article in IEEE International Symposium onElectromagnetic Compatibility (Vol. 2, 2002, pp. 667–670)describes the quantification of the absorption of electromagneticenergy and the resulting thermal effect from cellular phones. Theexperimental results...
- Q AM -vs- PM sections of Stats - Significance test (RawData, Software Required):There are two sections of statistics, one in the afternoon (PM)with 30 students and one in the morning (AM)...
- Q Sociology/Criminology/Economics: Recordscomparing unemployment rates, violent crime rates (per 1,000) andproperty crime rates (per 1,000) were gathered in a state for theyears 1975 - 2005 (n = 31). Below are the...
- Q Create frequency table (including  include classinterval, frequency, relative frequency and cumulative relativefrequency. ) and frequency polygon.Please explain HOW for a thumbs up!! TY05062223341717263725171030062233062210271037132619272131221514281713282234171310
- Q An elevator has a placard stating that the maximum capacity is1328 lblong dash8 passengers.​ So, 8 adult male passengers can havea mean weight of up to 1328 divided by 8...
- Q Andy is always looking for ways to make money fast. Lately, hehas been trying to make money by gambling. Here is the game he isconsidering playing: The game costs 2...
- Q 41112143867921421328416786389713512813332078355813546292477843649143387541393840291065633301052372121381111941A. Create frequency table (include  include classinterval, frequency, relative frequency and cumulative relativefrequency. )B. Create Frequency Polygon
- Q Triglycerides are blood constituents that are thought toplay a role in coronary artery disease. An experiment was conductedtosee if regular exercise could reducetriglyceride levels. Researchers measured the concentrationof triglycerides in...
- Q Motorola used the normal distribution to determine theprobability of defects and the number of defects expected in aproduction process. Assume a production process produces items witha mean weight of 10...
- Q A teacher is comparing the mean study time of his freshmen andsenior students. he believes that his senior students spend moretime studying per week than his freshmen students and decides...
- Q 1. You have 4 groups with an overall sample size of n = 20. TheF critical value at the alpha = 0.05 level of significance is 3.24.Complete the following 1...
- Q The following sample of weights was taken from 9 cans of sodaoff the assembly line. Construct the 80% confidence interval forthe population standard deviation for all cans of soda that...
- Q Q4. Human blood is grouped into four types: A, B, AB & O.Type O blood can be transfused to anyone (the universal donor)while people with Type AB blood can receive...
- Q Conduct a test at the alpha equals 0.01 level of significance bydetermining ​(a) the null and alternative​ hypotheses, ​(b) thetest​ statistic, and​ (c) the​ P-value. Assume the samples wereobtained independently...
- Q The manager of a pharmacy wants to know if prescriptions arefilled uniformly over the 7 days of the week. The manager takes asimple random sample of 245 prescription receipts and...
- Q I'm completely lost can someone really break it downin English with how to answer eachFor each question, draw the appropriate picture, withshading. Then show all calculations and write a sentence...
- Q Five hundred seventeen (517) homes in a certain southernCalifornia community are randomly surveyed to determine if theymeet minimal earthquake preparedness recommendations. One hundredseventy-one (171) of the homes surveyed met the...
- Q An engineer designed a valve that will regulate water pressureon an automobile engine. The engineer designed the valve such thatit would produce a mean pressure of 5.7 pounds/square inch. It...
- Q A random sample of size 16 from a normal distribution with knownpopulation standard deviation � = 3.1 yields sample average � =23.2.What probability distribution should we use for our samplingdistributions...
- Q The Intelligence Quotient (IQ) test scores for adults arenormally distributed with a population mean of 100 and a populationstandard deviation of 25. What is the probability we could select asample...
- Q Suppose the average GPA of all chemical engineering majors isnormally distributed with  μ = 3.47 and σ  =0.24. What is the probability that the sample mean from a randomsample of the GPAs...
- Q In a past​ election, the voter turnout was 69%In a​ survey, 930 subjects were asked if they voted in theelection.a. Find the mean and standard deviation for the numbers ofvoters...
- Q The Centers for Disease Control reported the percentageof people 18 years of age and older who smoke (CDC website,December 14, 2014). Suppose that a study designed to collect newdata on...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.What percentage of your campus student body is female? Letp be the...
- Q Do male and female servers at Swank Bar work the same number ofhours? A sample of 65 female servers worked an average of 30 hoursper week, with a standard deviation...
- Q The table below gives the list price and the number of bidsreceived for five randomly selected items sold through onlineauctions. Using this data, consider the equation of the regressionline, yˆ=b0+b1x,...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.A random sample of 5535 physicians in Colorado showed that 3386provided at...
- Q Total plasma volume is important in determining the requiredplasma component in blood replacement therapy for a personundergoing surgery. Plasma volume is influenced by the overallhealth and physical activity of an...
- Q What are some of the mistakes commonly made in StructuralEquation Modeling (SEM)?
- Q Overproduction of uric acid in the body can be an indication ofcell breakdown. This may be an advance indication of illness suchas gout, leukemia, or lymphoma.†Over a period of...
- Q 1. The city council of Pine Bluffs is considering increasing thenumber of police officers in an effort to reduce crime. Beforemaking a final decision, the council asks the chief of...
- Q The standard recommendation for automobile oil changes is onceevery 5000 miles. A local mechanic is interested in determiningwhether people who drive more expensive cars are more likely tofollow the recommendation....
- Q 5)The Environmental Protection agency requires that the exhaustof each model of motor vehicle be tested for the level of severalpollutants. The level of oxides of nitrogen (NOX) in the exhaust...
- Q 1) BEACH VACATION (5pts)You take your family on a wonderful,relaxing vacation to the beach. About 15 minutes after you’vesettled into the perfect spot in the sand, your oldest child tellsyou...
- Q The following table shows the number of cars sold last month bysix dealers at Centreville Nissan dealership and their number ofyears of sales experience.Years of ExperienceSales17292948514814A: Management would like to...
- Q **can you explain how to solve on calculator**1. Assume that adults have IQ scores that are normallydistributed with a mean of 96.9 and a standard deviation of19.9.Find the probability that...
- Q When we toss a penny, experience shows that the probability(longterm proportion) of a head is close to 1-in-2. Suppose nowthat we toss the penny repeatedly until we get a head....
- Q A social scientist would like to analyze the relationshipbetween educational attainments (years in higher ed) and annualsalary (in $1,000s). He collects the data above.SalaryEducation403534806412705544110838042355485642270560414084007656541258380aWhat is the equation for predicting salary...
- Q How much does household weekly income affect the household weeklyexpenditure on food?The following datashows household weekly expenditure on food and the household weeklyincome (all in dollars).Use the data belowto develop...
- Q The SAT and the ACT are the two major standardized tests thatcolleges use to evaluate candidates. Most students take just one ofthese tests. However, some students take both. The data...
- Q Below are the values for two variables x and y obtained from asample of size 5. We want to build a regression equation based thesample data.yÌ‚ = bâ‚€ + bâ‚xyx1652110862812531411On...
- 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 Following are thepublished weights (in pounds) of all of the team members of the SanFrancisco 49ers from a previous year.177; 205; 210; 210;232; 205; 185; 185; 178; 210; 206; 212;...
- Q The test scores for the analytical writing section of aparticular standardized test can be approximated by a normal​distribution, as shown in the figure.​(a) What is the maximum score that can...
- Q A study of identity theft looked at how well consumers protectthemselves from this increasingly prevalent crime. The behaviors of63 college students were compared with the behaviors of59nonstudents. One of the...
- Q Suppose that an accounting firm does a study to determine thetime needed to complete one person's tax forms. It randomly surveys150 people. The sample mean is 23.1 hours. There is...
- Q Below are percentages for annual sales growth andnet sales attributed to loyalty card usage at 74 Noodles& Company restaurants.Annual Sales Growth (px;) and Loyalty Card Usage(px; of Net Sales)(n =...
- Q Simple regression was employed to establish the effects ofchildhood exposure to lead. The effective sample size was about 122subjects. The independent variable was the level of dentin lead(parts per million)....
- Q Determine the 80​% confidence interval estimate for thepopulation mean of a normal distribution givenn=100​, σ=101​, and x (with line over it)=1,200.a. The 80% confidence interval for the population mean is...
- Q Why do independent group designs tend to be less powerful thandependent group designs? What circumstances give rise to dependentgroup designs not being more powerful than independent groupdesigns?
- Q 10. In a recent study on world​ happiness, participants wereasked to evaluate their current lives on a scale from 0 to​ 10,where 0 represents the worst possible life and 10...
- Q Annual expenditures for prescription drugs was $838 per personin the Northeast of the country. A sample of 60 individuals in theMidwest showed a per person annual expenditure for prescriptiondrugs of...
- Q Suppose you roll, two 6-sided dice (refer back to the samplespace in the sample space notes). Write any probability as adecimal to three place values and the odds using a...
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.†Suppose a small group of 12Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q Suppose that 1 out of 4 eggs contain the Salmonella virus, andeggs are independent of each other with regard to havingSalmonella. If Sue uses 3 eggs to bake a cake,...
- Q Rounded to 4 decimal, what is the standard deviation of abinomila distribution that uses 216 trials with a successprobability of 0.17?Rounded to 4 decimal, what is the standard deviation of...
- Q Two cards are drawn at random from an ordinary deck of 52playing cards. If the two cards display the same suit, you win $2.If they are the same color only,...
- Q Refer to the accompanying technology display. The probabilitiesin the display were obtained using the values of n equals 5 and pequals 0.759. In a clinical test of a​ drug, 75.9​%...
- Q BrandQuality RatingSatisfactionRatingAcura86822Audi111832BMW113845Buick114807Cadillac111818Chevrolet111789Chrysler122748Dodge130751Ford93794GMC126792Honda95766Hyundai102760Infiniti107805Jaguar130854Jeep129727Kia126761Land Rover170831Lexus88822Lincoln106820Mazda114774Mercedes-Benz87837Mercury113769Mini Cooper133815Mitsubishi146767Nissan111763Porsche83882Ram110780Scion114764Subaru121755Suzuki122750Toyota117750Volkswagen135797Volvo109795Each year a market research company surveys new car owners 90days after they purchase their cars. This data is used to rate autobrands (such as Toyota and...
- Q Jace collected the following data on the quarterly roomoccupancy (in hundreds) for a resort hotel in Iowa.YearquarterOccupancy2013116221394182014115220310418201511722431342220161172253114212017118226314425Plot the data and describe any trend and seasonal effects youobserve in the data.Compute...
- Q To test Upper H 0​: mu equals 50 versus Upper H 1​: mu less than50​, a random sample of size n equals 22 is obtained from apopulation that is known...
- Q A (time-homogeneous) Markov chain built on states A and B isdepicted in the diagram below. What is the probability that aprocess beginning on A will be on B after 2...
- Q Suppose four teams, numbered one through four, play asingle-elimination tournament, consisting of three games. Two teamsplay each game and one of them wins; ties do not occur. Thetournament bracket is...
- Q A medical investigation claims that the average number ofinfections per week at a hospital in Pennsylvania is at least 19.1.A random sample of 40 weeks had a mean number of...
- Q Consider the following hypothesis test:H 0:Â Â Â 50H a:Â Â > 50A sample of 60 is used and the population standard deviation is7. Use the critical value approach to state your conclusion foreach of...
- Q A study reported in the Journal of the American MedicalAssociation investigated the cardiac demands of heavy snowshoveling. Ten healthy men underwent exercise testing with atreadmill and a cycle ergometer modified...
- Q A customer service phone line claims that the wait times beforea call is answered by a service representative is less than 3.3minutes. In a random sample of 62 calls, the...
- Q whatistheinteriorpointpenaltyfunctionmethod?Whatistheexteriorpointpenaltyfunctionmethod?
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