Statistics question and answers for August 04, 2023
- Q 1. Consider an LP where you have to determine how much/many ofeach product to manufacture; there in all, TWO products made fromthree ingredients. The ingredient usage matrix is as follows.Ingredint1...
- Q A particular fruits weights are normally distributedwith a mean of 387 gram and a standard deviation of 13 grams if afruit is picked at random then 19% of the time...
- Q The Occupational Safety and Health Administration (OSHA) hasidentified the gaseous chemical benzene as a possiblecancer-causing substance. A federal regulation requires factoriesto keep the amount of benzene in the air at...
- Q Using ANOVA Assess attitudes toward same-sexmarriages of non-politician republicans and democrats Note:0 disagree with same-sex marriages and 10 Agree with same-sexmarriagesRepublicans6,5,3,7,4Democrats8,6,9,8,7Independent6,7,5,6,5
- Q ​Co-browsing refers to the ability to have a contact centeragent and customer jointly navigate an application on a real timebasis through the web. A study of businesses indicates that 88...
- Q Use the provided contingency table and expected frequencies. Atalpha equals 0.01​, test the hypothesis that the variables areindependent. What is the test statistic?Resultstretchednot stretchedinjury16(20.979)24(19.021)No injury209(204.021)180(184.979)
- Q The following is a list of the first names of 24 fictionalstudents in a statistics class at Cleveland State University. Thestudents are identified by numbering them 01 through 24.A sample...
- Q CorrelationTo determine how the number of housing starts is affected bymortgage rates an economist recorded the average mortgage rate andthe number of housing starts in a large country for the...
- Q Use a 5% significance level for all hypothesis tests (α=.05)unless otherwise noted. Give conclusions as complete sentences.This is considered an ‘open book’ test so you may use the text,StatCrunch, any...
- Q ) The breaking strength of plastic bags used for packagingproduce is normally distributed, with a mean of 17 pounds persquare inch and a standard deviation of 9.5 pounds per square...
- Q On the most recent tax cut proposal, a random sample ofDemocrats andRepublicans in the Congress cast their votes as follows. Are thevotes of Democrats andRepublicans independent of each other?a. State...
- Q A machine has 6 heat conductors, each with a life time thatfollows a lognormal distribution with mean 866 hours and standarddeviation 40 hours. The machine needs to have at least...
- Q .The following table displays thejoint probability distribution of two discrete random variables Xand Y.-101210.200.160.1200.30.120.10What is P(X=1/Y=1)?   What is the value of E(X/Y=1)?   What is the value of VAR(X/Y = 1)?What is the...
- Q What else need to be research about the topic forsafety sake a case study of School security effort and there in pakon education reform
- Q A U.S. based internet company offers an on-line proficiencycourse inbasic accounting. Completion of this online course satisfies the\"Fundamentals of Accounting\"course requirement in many MBA programs. In the first semester 315students...
- Q acode is 4 random letters and 3 random digits. what is theprobability of the 4 letters all being different while the 3.numbers at the end are in ascending order?b) in...
- Q A growing concern of employers is time spent in activities likesurfing the Internet and e-mailing friends during work hours. TheSan Luis Obispo Tribune summarized the fundings from a survey of...
- Q Bowie State University magazine agency wants to determine thebest combination of two possible magazines to print for the monthof May.  Star which the University has publishedin the past with great success...
- Q A researcher is interested in explaining variation in people'sincomes. He hypothesizes that income is caused by number of friendsin a person's social network. He conducts a correlation analysis(Pearson's r) between...
- Q What is the purpose of measures of association in criminaljustice research?Generally, explain their role as it relates to evaluating claimsabout theories of crime causation or program/policy effectiveness.Use an example to...
- Q A recent study has shown that 28% of 18-34 year olds check theirFacebook/Instagram feeds before getting out of bed in themorning,If we sampled a group of 150 18-34 year olds,...
- Q Liam is a professional darts player who can throw a bullseye 70%of the time.If he throws a dart 250 times, what is the probability he hits abulls eye:a.) At least...
- Q We want to test whether proportions of cancer differ between agroup exposed to estrogen (Group1) and a placebo group (Group2)(two-sided). Let n1=8506 and n2=8102. After a fiveyear follow up, Group...
- Q The data set 2017NBADraft.txt is a comma delimited filecontaining data on the players selected in the 2017 NBA draft.Assume this data set is a representative sample of all players inthe...
- Q Do heavier cars really use more gasoline? Suppose a car ischosen at random. Let x be the weight of the car (inhundreds of pounds), and let y be the miles...
- Q Jill comes to you and is interested in the mean calorie contentof energy bars. She believes that the distribution of caloriecontent is approximately normal. You tell her to take a...
- Q Laura has decided to offer a meeting at her house as herbirthday. For this, it has prepared several quantities of 3 typesof cocktails: tom collins, cubalibre, mojitoThe dynamics that Laura...
- Q 1. Online customer service is a key element to successful onlineretailing. According to a marketing survey, 6.8% of onlinecustomers take advantage of the online customer service. Randomsamples of 210 customers...
- Q The probabilities of an individual having a particular bloodtype are listed below.            TypeA                        .4            TypeB                        .3            TypeAB                     .25            TypeO                        .059.   Find the probability that a randomlyselected individual will have type A or type b blood.10. Find the probability that...
- Q 5. Confidence Intervals Suppose you have the following X: (6, 5,4, 1, 1). What is the mean of X? What is the Standard deviation ofX? What is the Standard Error...
- Q The appraisal of a warehouse can appear straightforward comparedto other appraisal assignments. A warehouse appraisal involvescomparing a building that is primarily an open shell to other suchbuildings. However, there are...
- Q A roulette wheel has 38 slots: 18 red, 18 black, and 2 green. Aball is tossed into the wheel and eventually settles in a slot atrandom. You play many games,...
- Q Scientist looked at 7 patients with edemas. They researched thefovea thickness in 7 eyes pre and post surgery. The resultspresented from surgery areshown in the following table:Subject: Pre-op Thickness: Post-op...
- Q GPA of the students who are taking Stat 50 class at bcc followsa normal distribution with a mean of 2.87 and a standard deviationof 0.43. If 35 students who are...
- Q Given: trying to determine if grading practices are consistentwith the rest of their department. Historical data indicated thedepartment's overall grade distribution for the course thisinstructor teaches is the following:A/A-: 54%...
- Q Find a data set on the internet. Some suggested search terms:Free Data Sets, Medical Data Sets, Education Data Sets.Introduce your Data Set and Cite the Source.What trends do you notice...
- Q Discuss the Utility of concomitant variable in designof experiment. Thank you
- Q Use the following table to find the T statistic for inference onthe difference of two means of 0.99 and 1 carats0.99 Carat( pt= 99, X= 44.50, S= 13.321 Carat (pt=...
- Q What are the three main ways of assigning a probability?List four possible outcomes needed to determineprobabilities?An experiment consists of three stages. There are threepossible outcomes in the first stage, four...
- Q Macy’s purchases model 505 straight-leg, blank ink denim jeansfor women from Levis Straus & Co and sells them to consumers in185 store locations across 35 U.S. states. Levis Straus &...
- Q STAR Co. providespaper to smaller companies whose volumes are not large enough towarrant dealing directly with the paper mill. STAR receives100-feet-wide paper rolls from the mill and cuts the rolls...
- Q 1. Complete the problems below.a. Find the critical value z a/2 that corresponds to 93%confidence level.Z a/2 = _____Q1 (ROUND TO 2 DECIMAL PLACES)b.You plan to conduct a survey to...
- Q The Environmental Protection Agency has determined that safedrinking water should, on average, contain no more than1.3 mg/liter of copper. You are testing water from a new source,and take 31 water...
- Q A cost estimator for a construction company has collected thedata found in the source file Estimation.xlsx describing the totalcost (Y) of 97 difference projects and the following 3 independentvariables thought...
- Q The union for a particular industry has determined that thestandard deviation of the daily wages of its workers is $19. Arandom sample of 70 workers in this industry has a...
- Q A certain virus infects one in every150people. A test used to detect the virus in a person ispositive80%of the time when the person has the virus and55​%of the time when...
- Q Valles Global Industries (VGI) is getting ready to market theirInternet-based party planning service. One of the menu items is akabob. The kabob was designed to have four vegetable chunks andthree...
- Q Recorded here are the germination times (in days) for sixteenrandomly chosen seeds of a new type of bean: 11, 13, 12, 13, 20,15, 18, 17, 14, 18, 10, 12, 13,...
- Q Consider the following data ofexperimental data measuring the lifetime of a wire as a function oftemperatureTemp200200200200200200Lifetime593354044947496333583878Temp220220220220220220Lifetime15611494747768609777Temp240240240240240240Lifetime258299209144180184Sketch scatter plots of untransformed data and of ln(lifetime)vs 1/tempEstimate the lifetime of the wire...
- Q . According to a 2018 report from the Center on Education andthe Workforce at Georgetown University, 70 percent of full-timecollege students are working. Suppose 15 students full-time collegestudents are randomly...
- Q 6.A survey of 25 grocery stores produced the following samplestatistics: 1.) mean price for a gallon of milk was $2.98, and 2.)a calculated standard error of $0.10. What is the...
- Q Members of the millennial generation are continuing to bedependent on their parents into early adulthood. A family researchorganization has claimed that, in past generations, no more than27% of individuals aged...
- Q 4. Customers enter a store at a rate of 3 customers perhour.a) Compute the probability that at least two, but no more thanfive customers enter the store in a given...
- Q Use the International Stock Market database from “ExcelDatabases.xls†on Blackboard. Use Excel to develop a multipleregression model to predict the DJIA by the Nasdaq, the S&P500, the Nikkei, the Hang...
- Q Give an example of a hypothesis test problem for either aproportion or a mean and describe the parts of the problem whichidentify the hypothesis test as working with a proportion...
- Q 4. Does distance from object affect the eye focus time? Anindustrial engineer is conducting an experiment on eye focus time.She is interested in the effect of the distance of the...
- Q examples of graphs on how an education is important to children inpoverty
- Q Internet service: An Internet service provider sampled 545customers, and finds that 65 of themexperienced an interruption in high-speed service during theprevious month.(b) Construct a 99.8% confidence interval for the proportion...
- Q A tree researcher wishes to test the claim made by a colleaguethat trees of a certain species in a forest to the north are thesame height as the same species...
- Q Sampling distribution questionState the definition of sampling distribution?Let’s assume that we have a Bernoulli random variable X,X = a with probability 0.78,X = b with probability0.22,  Where a and b are...
- Q A new design for the braking system on a certain type of car hasbeen proposed. For the current system, the true average brakingdistance at 40 mph under specified conditions is...
- Q A company owns 400 laptops. Each laptop has an 8% probability ofnot working. You randomly select 20 laptops for your salespeople.1.What is the likelihood at most 6 will be broken?...
- Q In a sample of 350 students selected from a large college ofbusiness, 25% are found to be marketing majors. The 25% is astatistic.True                FalseLily has been keeping track of what she...
- Q 10) What test should you run to determine if your residuals arenot spatially dependent (i.e. they are independent)? If that testproves to be significant, what corrective action can you take?
- Q A researcher conducts an Analysis of Variance (ANOVA) testlooking at the effect of different treatment program options(therapy, education and reentry services) and finds that drug uselevels vary significantly among between...
- Q 1. Explain the process of creating a significance test.2. How do confidence intervals and significance testsrelate?3. When do you use a matched-pairs t-test?
- Q 1) Baltimore Furniture Inc. owns two factories, each of whichproduces three types of tables – the deluxe, medium and thestandard. The company has a contract to supply tables to a...
- Q Match the Question with the TestResearcher's Question: \"Does the number of thefts a respondentcommits differ significantly based on he respondent's post-releasesupervision status?\" Match the most appropriate statistical test touse for...
- Q The weight of gravel, in kilograms, collected by a power shovelmay be modeled by a normal distribution with unknown mean, µ, andstandard deviation 50 kg. The weights of a random...
- Q data on how eduation is importnat to children living inpovertyexamples of data how after achool programs help in childrenseducation
- Q In a random sample of 200 adults and 300 teens who watched acertain television show, 50 adults and 150 teens said they likedthe show. prove with a 5% significance that...
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.†Suppose a small group of 14Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q Gillette claims that their double-edge shaver is better than theleading brand of single-edge shavers (Lady Bic). In a recent study,26 women rated the Gillette and the Lady Bic shavers on...
- Q An ethnographer working in the municipal center of Maxcanu, inYucatan, Mexico, noticed that this town had a lot more houses builtwith traditional thatch roofs. On the basis of architectural style,this...
- Q 1.A quality manager is developing a regression model to predictthe total number of defects as a function of the day of week theitem is produced. Production runs are done 10...
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