Basic Math question and answers for August 31, 2023
- Q Television advertisers base their investment decisions regardingthe promotion of their products and services on demographicinformation about television viewers. The age of the viewers is akey factor in their process. The...
- Q is there any scenarios when can a low R2 value beacceptable?
- Q Several years​ ago, a study of college freshmen found that29.2​% of incoming freshmen characterized their political views as​liberal, 46.6​% as​ moderate, and 24.2​% as conservative. For this​year, a random sample...
- Q Questions 6-10 are related to the following As a statisticscourse assignment you are to build a 95% confidence interval forthe mean monthly rental for two-bedroom apartments in MarionCounty. A random...
- Q Suppose cattle in a large herd have a mean weight of 1158lbs anda standard deviation of 92lbs . What is the probability that themean weight of the sample of cows...
- Q The research around Leona’s Tacos has created quite a buzz andbusiness is great. Leona is planning on expanding her menu andshe’s going to start with a new taco filling. She...
- Q 1. You have a number of variables -- a response variable andsome proposed predictors. A correlation matrix may help to give anidea of the strength of the linear relationships present....
- Q Studies are often done by pharmaceutical companies to determinethe effectiveness of a treatment program. Suppose that a new AIDSantibody drug is currently under study. It is given to patientsonce the...
- 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 A​ gender-selection technique is designed to increase thelikelihood that a baby will be a girl. In the results of the​gender-selection technique,862862births consisted of448448baby girls and414414baby boys. In analyzing these​ results,...
- Q The numbers of online applications from simple random samples ofcollege applications for 2003 and for the 2009 were taken. In 2003,out of 312 applications, 97 of them were completed online....
- Q 33) Over the past several months, an adult patient has beentreated for tetany (severe muscle spasms). This condition isassociated with an average total calcium level below 6 mg/dl.Recently, the patient's...
- Q A professor has a class with four recitation sections. Eachsection has 16 students (rare, but there are exactly the samenumber in each class...how convenient for our purposes, yes?). Atfirst glance,...
- Q For the data below construct a 95% confidence interval for thepopulation mean.53.4 51.6 48.0 49.8 52.8 51.8 48.8 43.4 48.2 51.8 54.6 53.8 54.649.6 47.2
- Q For each of the questions below, a histogram is described.Indicate in each case whether, in view of the Central LimitTheorem, you can be confident that the histogram would look likeapproximately...
- Q The Downtown Parking Authority of Tampa, Florida, reported thefollowing information for a sample of 220 customers on the numberof hours cars are parked and the amount they are charged.Number of...
- Q . A business researcher wants toestimate the average number of years of experience an accountmanager has working with the company before getting promoted toaccount manager. Eight account managers are randomly...
- Q uestion 5 (1 point) If μ=5.06 and σ=1.27, find the z-score forx=6.87. Question 5 options: 1.43 2.89 -1.43 -2.89Question 6 (1 point) If μ=63.81 and σ=7.94, find the z-score forx=50.16....
- Q When is the Bayes' rule (not the Bayes' theorem) optimal?Explain the meaning of that by using a2x2 confusion matrix
- Q A researcher wishes to​ estimate, with 99 ​% ​confidence, thepopulation proportion of adults who think Congress is doing a goodor excellent job. Her estimate must be accurate within 2 ​%...
- Q Ads: A company is willing to renew itadvertising contact with a local radio station only if the stationcan prove that more than 20% of the residents of the city heard...
- Q Sampling and Sample Distribution and Errors:during those times it is difficult to count an entire population,sampling is one great way to test that population and the results.These are results that...
- Q FCAT scores and poverty. In the state of Florida, elementaryschool performance is based on the average score obtained bystudents on a standardized exam, called the Florida ComprehensiveAssessment Test (FCAT). An...
- Q For each of the following experiments describe the samplespace.A) Three dice are rolled.B) 5 cards are dealt from a deck.C) Temperature in front of a building is measured.D) A student's...
- Q The Airline Passenger Association studied the relationshipbetween the number of passengers on a particular flight and thecost of the flight. It seems logical that more passengers on theflight will result...
- Q A quality expert inspects 420 items to test whether thepopulation proportion of defectives exceeds .03, using aright-tailed test at α = .02.(a) What is the power of this test if...
- Q Quantitative Methods IIThis assignment relates to the following Course LearningRequirements:[CLR 1] Calculate the chance that some specific event will occurat some future time • knowledge of the normal probabilitydistribution[CLR 2]...
- Q The Donner Party: Natural Selection in Action The Donner Partyis the name of emigrants who travelled in covered wagons fromIllinois to California in 1846 and became trapped in the SierraNevada...
- Q PLEASE SHOW ANSWER WITHOUT USING EXCEL OR ANY SOFTWARE.NEED DETAILED WORKINGS OF THE ANSWER. PLEASE NOTE NOEXCELThe manager of a computer software company wishes to study thenumber of hours senior...
- Q Two plots at Rothamsted Experimental Station were studied forproduction of wheat straw. For a random sample of years, the annualwheat straw production (in pounds) from one plot was asfollows.5.916.686.756.967.317.187.065.796.245.916.14Use a...
- Q A tire company produced a batch of 5 comma 300 tires thatincludes exactly 260 that are defective. a. If 4 tires are randomlyselected for installation on a​ car, what is...
- Q Twosix-sided dice are rolled and the sum is observed. Define events Aand B as follows:Event A: The sum is odd.Event B: The sum is less than 9.Find P(A or B)Please...
- Q The town of Pleasantville is going to form a public safetycommittee. Pleasantville already has a seven-person town council, afive-person citizen advisory board; the police force is made up often officers....
- Q n Ecological Engineering, the potential for floating aquaticplants to treat dairy manure wastewater was investigated. For onepart of the study, 16 treated wastewater samples were randomlydivided into two groups- a...
- Q Suppose the lengths of the pregnancies of a certain animal areapproximately normally distributed with mean mu equals 127 days andstandard deviation sigma equals 12 days. Complete parts​ (a)through​ (f) below....
- Q 3-2-1kathleen wants to know whether height and shoe size arerealted in women. She stops and surveys some female students on thequad and finds the following information:HeightShoe Size646.5607708.5699.5667678708.5668688.51)what is the covariance...
- Q (a) Find the exact probability of exactly 55 heads in 100 tossesof a coin.(b) Estimate this probability using normal distribution. Compareyour answers.
- Q In a study of speed​ dating, male subjects were asked to ratethe attractiveness of their female​ dates, and a sample of theresults is listed below (1 =not attractive; 10 equals=extremely​attractive)....
- Q Friedman and Rosenman (1974) classified people into twocategories: Type A personalities and Type Bpersonalities.  Type A's are hard-driving, competitive,and ambitious. Type B's are more relaxed, easy goingpeople.  One factor that differentiates these...
- Q In order to compare the means of two populations, independentrandom samples of 400 observations are selected from eachpopulation, with the results found in the table to the right.Complete parts a...
- Q A microwave manufacturing company has just switched to a newautomated production system. Unfortunately, the new machinery hasbeen frequently failing and requiring repairs and service. Thecompany has been able to provide...
- Q Discuss the process of selecting problem areas and formulatingresearch questions within qualitative research studies. Compare andcontrast your response to qualitative research studies.
- Q 1. Given that the random variable X is normally distributed witha mean of 30 and a standard deviation of 5, determine thefollowing: P(32.2 <X).2. The pdf(probability distribution function) of a...
- Q To evaluate the effectiveness of a new type of plant fooddeveloped for tomatoes, an experiment was conducted in which arandom sample of 56 seedlings was obtained from a large greenhousehaving...
- Q The birthweight of newborn babies is Normally distributed with amean of 3.39 kg and a standard deviation of0.55 kg.(a) Find the probability that a baby chosen at random will havea...
- Q You may believe that each day, married and unmarried women spendthe same amount of time per week using Facebook. We would like totest this hypothesis. A random sample of 45...
- Q NUTRITIONAL DATA FOR FAST FOOD2017                                                                                                          XYNo.Fast Food Restaurant                                Item                     TypeSugar (g)Protein (g)1.McDonald’sHamburgerBurger    6     122.McDonald’sCheeseburgerBurger    7     153.McDonald’sBig MacBurger    9     244.McDonald’sQuarter pounder with cheeseBurger  10     305.McDonald’sBacon clubhouse BurgerBurger  14     396.McDonald’sDouble quarter pounder with cheeseBurger  10     ...
- Q Consider the following hypotheses:H0: μ = 3,900HA: μ ≠3,900The population is normally distributed with a population standarddeviation of 510. Compute the value of the test statistic and theresulting p-value...
- Q Two teaching methods and their effects on science test scoresare being reviewed. A random sample of 9 students, taught intraditional lab sessions, had a mean test score of 71.5 with...
- Q Miles Freq 0-4 3 5-9 1410-14 1315-19 4Write two sentences for non-statisticians expressing Chebyshev’s Theorem. Select the most appropriate sentence corresponding to two standard deviations.*About...
- Q Suppose you are conducting a quantitative research study for amajor car dealership in the United States with the objective torate the importance of typical obstacles in consumers' carpurchasing process (such...
- Q a) A 13-card Bridge hand is dealt from a standard deck. What isthe percentage chance that the hand contains exactly 6 spades orexactly 6 hearts or exactly 6 diamonds? Be...
- Q For an irreducible Markov chain, either all states are positiverecurrent or none are. Prove.
- Q Suppose a survey was done this year to find out what percentageof all Americans own a bread machine. Out of their random sample of1,000 Americans, 300 own a bread machine....
- Q We wish to determine if a two sections of the same introductorycourse have significantly different “success rates†(defined as theproportion of students who receive a course grade of A, B,...
- Q A student stated: “I fail to see why the response function needsto be constrained between 0 and 1 when the response variable isbinary and has a Bernoulli distribution. The fit...
- Q You want tobuild an interval estimate for the proportion of adult Hoosiers whofavor legalizing Sunday sales of alcoholic beverages in Indiana.You survey a random sample of 820 adult Hoosiers, of...
- Q . A bank has recently begun a newcredit program. Customers meeting a certain credit requirement canobtain a credit card accepted by participating area merchants thatcarries a discount. Past data show...
- Q SourcedfSSMSFSignificance of FRegression207 (Given)Residual16.59 (Given)TotalSuppose that a multiple regression model was developed with asample of data of size 190 and 13 independent variables. One of the13 independent variables is a...
- Q Suppose that the amount of time that students spend studying inthe library in one sitting is normally distributed with mean 43minutes and standard deviation 17 minutes. A researcher observed 43students...
- Q Finally, you have been asked to compare the mean ages of thesupporters of the candidate in various sectors of the country.Random samples of supporters of the candidate are selected fromfive...
- Q One factor in rating a National Hockey League team is the meanweight of its players. A random sample of players from the DetroitRed Wings was obtained. The weight (in pounds)...
- Q The data below are yields for two different types of corn seedthat were used on adjacent plots of land. Assume that the data aresimple random samples and that the differences...
- Q In this problem, assume that the distribution of differences isapproximately normal. Note: For degrees of freedom d.f. not in theStudent's t table, use the closest d.f. that is smaller. In...
- Q A poll printed the results of a survey of 880Americans focusingon their perception of the quality of Japanese products. It hasbeen observed that the sentiment towards Japanese products hasactually improved...
- Q The birth weights for two groups of babies were compared in astudy. In one group the mothers took a zinc supplement duringpregnancy. In another group, the mothers took a placebo....
- Q Use of Multiple Sample Hypothesis TestsIn an hospital setting, when might you want to know the meandifferences between two or more groups? Please describe thesituation, including how and why it...
- Q Assume that the traffic to the web site of Smiley’s People,Inc., which sells customized T-shirts, follows a normaldistribution, with a mean of 4.6 million visitors per day and astandard deviation...
- Q I need step by step instructions on using Excel to do thisassignment and the values I need to enter to compute what is beingasked of me. I don't know how...
- Q In your own words, describe the correlation coefficient.
- Q An instructor has given a short quiz consisting of two parts.For a randomly selected student, let X = the number of pointsearned on the first part and Y = the...
- Q The charitable foundation for a large metropolitan hospital isconducting a study to characterize its donor base. In the past,most donations have come from relatively wealthy individuals; theaverage annual donor income...
- Q 3. (3 pt) Use R functions to generate 1000 random samples fromt-distribution with15 degrees of freedom. Make a histogram with the samplesshowing the relativefrequencies. Then overlay a probability density plot...
- Q In a survey of 3316​adults, 1433 say they have started paying bills online in the lastyear. Construct a​ 99% confidence interval for the populationproportion. Interpret the results.(a) A​ 99% confidenceinterval...
- Q We toss a fair 6 sided die and flip a fair coin twice. Definethe random variable Y1 to be the number of sports atop the die.Define Y2 to be the...
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