Statistics question and answers for August 19, 2023
- Q RegressionMake a distinction between simple linear and multiple linearregression. Can you think of examples in your business world wherethese techniques are or should be applied? Share the details, wherepossible.
- Q Question 3: EatWell Inc., a large fast-food chain company ofCanada, wants to test two versions of a new product beforelaunching its full production. They select a random sample ofindividuals among...
- Q A college offers teaching in Math, English, Chemistry, andBiology. The number of students enrolled in each subject is listedbelow. If the college can only afford to hire 19 teachers,determine how...
- Q Question 2: The Office of the Superintendent of Bankruptcy ofCanada (OSBC) is developing a new index to measure thevulnerability of firms in the new technology industry. The index isa ratio...
- Q Ina random sample of 19 residence of the state of Tennessee, the mainwaste recycling per person per day was 1.3 pounds with a standarddeviation of 0.91 pounds. Determine the 95%...
- Q Please Answer All 4 questionsThe British Museum, located in the Bloomsbury area of London inthe United Kingdom, is a public institution dedicated to humanhistory, art, and culture. To ensure the...
- Q Each time a fisherman casts his line, a fish is caught withprobability p, independent of whether a fish is caught on any othercast of the line. The fisherman will fish...
- Q PLEASE ANSWER ALL 4 QUESTIONSThe owner of a bar wants to know whether their customers preferJohnnie Walker Whiskey or Seagram's Whiskey. The bar owner isundecided over which of two possible...
- Q Find a research article that used an ANOVA and a post-hocanalysis in their methods/results. Describe how the ANOVA andpost-hoc analysis was used to answer the research. List what did itcompare,...
- Q Now you may understand why you need a statistics course. As aforensics analyst, how would you use statistical flow analysis toidentify a compromised host? How about to confirm or disprove...
- Q Question 3: (Minitab or Excel – Excel is easiest)The table below shows the average distance of each of the nineplanets from the sun, and the length of the year (in...
- Q The length of a species of fish is to be represented as afunction of the age (measured in days) and water temperature(degrees Celsius). The fish are kept in tanks at...
- Q A recent study attempted to estimate the proportion of Floridaresidents who were willing to spend more tax dollars on protectingthe Florida beaches from environmental disasters. Forty-six hundredFlorida residents were surveyed....
- Q Can a low barometer reading be used to predict maximum windspeed of an approaching tropical cyclone? For a random sample oftropical cyclones, let x be the lowest pressure (inmillibars) as...
- Q The Pew Research Center found that 38.6% of adult Americansbelieve that marriage is now obsolete. Suppose a random sample of550 American adults is asked whether marriage is obsolete. Describethe sampling...
- Q Researchers often enter a lot of data into statistical softwareprograms. The probability of making zero to two errors per 1,000keystrokes is 0.58, and the probability of making three to fiveerrors...
- Q You want to rent an unfurnished one-bedroom apartment for nextsemester. You take a random sample of 10 apartments advertised inthe local newspaper and record the rental rates. Here are the...
- Q The electric power consumed each month by a chemical plant isthought to be related to the average ambient temperature (x1), thenumber of days in the month (x2), the average product...
- Q The US Navy is interested in acquiring a new communicationsrelay for its submarines. Manufacturers tested 50 units and foundthe mean time between failures to be 2607 minutes, and the samplestandard...
- Q 1). Given a container with 6 white balls and 9 black balls, if 4balls are chosen randomly, what is the probability that exactly twoare white?2). Given a container with 6...
- Q For the Poisson Distributiona. Is λ×T a parameter of position, scale, shape or acombination? Explain.b. We can treat “λ×T†as a single parameter, but they actuallyrepresent two parameters: λ and...
- Q Is the environment a major issue with Americans? To answer thatquestion, a researcher conducts a survey of 1255 randomly selectedAmericans. Suppose 730 of the sampled people replied that theenvironment is...
- Q Approximately 360 million people speak English as their firstlanguage. With 231 million native speakers, the United Statescomprises the majority of the global total. Additionally, there are60 million native English speakers...
- Q Let's say that I have a set of ten linear, simulateous equationsfor 6 unknowns. What MATLAB code could I write to see how many ofthe variables could be solved in...
- Q Find the mean and standard deviation for each binomial randomvariable: a. n = 34, π = .65 (Round your mean value to 2 decimalplaces and standard deviation to 4 decimal...
- Q Scores of an IQ test have a​ bell-shaped distribution with amean of 100 and a standard deviation of 17. Use the empirical ruleto determine the following. ​(a) What percentage of...
- Q The following is the transition probability matrix of a Markovchain with states 1, 2, 3, 4 P01230.4.3.2.11.2.2.2.42.25.25.503.2.1.4.3If Xnot = 1(a) find the probability that state 3 is entered before state4;(b)...
- Q Researchers believe that a higher percentage of males areafflicted with cysturina than females. Suppose of the 50individuals, 15 were females and the remainder were males. Using99% confidence, estimate the proportion...
- Q Up to 20% of Americans contract influenza each year. A sample of400 randomly selected Americans is chosen and the number withinfluenza is recorded. Let X represent the number with influenza...
- Q Students attending a certain university can select from 130major areas of study. A student's major is identified in theregistrar's records with a two-or three-letter code (for example,statistics majors are identified...
- Q A professor takes a random sample of 25 students and administersa test with questions increasing in difficulty. He takes anothersample of 25 students and administers a test with questionsdecreasing in...
- Q Use R to compute the probability that a Normal random variablewith mean 0 and variance 3.7 is less than.2. Find the 93% quantileof the above random variable by using the...
- Q ****URGENT******1A)Â Â An event has four possible outcomes, A, B, C, andD. All of the outcomes are disjoint.Given that P(Bc) = 0.2, P(A) = 0.1,and P(C) = 0.3, what is P(D)?1B) A...
- Q How do you test if there is evidence of a relationship betweentwo things? Which statistically test would need to be used?
- Q Write a R-script to (and show the outputs of your code)(a) Create a sequence of numbers starting at 3.5 and ending at10.7 with increments of 0.79. Find the variance and...
- Q A random sample with replacement of size 100 is drawn from apopulation with mean 3.5 and standard deviation 3. Use the normalapproximation to calculate the probability that the sample averageis...
- Q Correlation - Do you think there would be a positive correlationbetween a placement test score and the final grade in thisstatistics class? What other variables do you think would have...
- Q Scenario 8.2The undergraduate grade point average (GPA) for studentsadmitted to the top graduate business schools was 3.37. Assume thisestimate was based on a sample of 90 students admitted to the...
- Q A researcher tested a research hypothesis that people withdiagnosed depression will have REDUCED level of depressive symptomsafter a cognitive therapy treatment, as compared to thepre-treatment level of depressive symptoms. The...
- Q suppose given the three pairwise independent events, all threeof which cannot simultaneously occur. Assuming that they all havethe same probability x , determine the largest possible value ofx.
- Q Sometimes probability statements are expressed in terms of odds.The odds in favor of an event A are the following ratio.P(A)/P(not A) = P(A)/P(Ac)For instance, if P(A) = 0.60, then P(Ac)...
- Q Vol%R.I01.3323101.3388201.3446301.3497401.3541501.3580601.3610701.3630801.3638901.36301001.3600I tried to graph the following data in excel to obtain theequation of the line which happens to be polynomial 4th orderI am given a R.I of 1.3616 and expected...
- 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% confidenceassuming...
- Q Effects on Selling Price of HousesSquare FeetNumber of BedroomsAgeSelling Price112521121500146134123600152738158100171949214800174549215500219741125500024144132572002830283041426220030153015514282400Determine if a statistically significant linear relationshipexists between the independent and dependent variables at the 0.01level of significance. If the relationship...
- Q Break a stick of unit length at a uniformly chosen random point.Then take the shorted of the two pieces and break it again in twopieces at a uniformly chosen random...
- Q Take a moment to reflect on what you have learned inthis module about hypothesis testing in general and A/B testing inparticular.- In what other scenarios or industries do you thinkthis...
- Q 1. Now assume that Data Set A depicts the scores of fivesubjects who received both Treatment 1 and Treatment 2. Calculate at-test for dependent means to determine whether the means...
- Q The design of an automotive gear requires the diameter to be 4inches. To evaluate the production quality, you sample 30 gears andfind the average to be 4.08 with a standard...
- Q The U.S. Census Bureau computes quarterly vacancy andhomeownership rates by state and metropolitan statistical areas.The following data are the rental vacancy rates in percentage (%)grouped by region for the last...
- Q Upload Cars04-1 Cars04-1 data and use engine size to predict thecar’s city gas mileage(City MPG). Answer the questions.I) For each additional 2.0 liter in engine size how muchthe MPG will...
- Q General HyThere, Inc., is a manufacturer of hydraulic machinetools. It has had a history leakage trouble resulting from acertain critical fitting. Twenty five samples of machined partswere selected, one per...
- Q In order to test whether camshafts are being manufactured tospecification a sample of n = 50 camshafts are selected at random.The average value of the sample is calculated to be...
- Q Blood fat content may be influenced by many factors including age and weight. A nutritionist collected data on blood fat content, age and weight from sample of people. The data...
- Q If two samples A and B had the same mean and standard deviation,but sample A had a larger sample size, which sample would have thewider 95% confidence interval? Homework Help:...
- Q A personnel manager has found that historically the scores onaptitude test given to applicants for entry level positions followa normal distribution. A random sample of nineteen test scores fromthe current...
- Q Let x represent the number of mountain climbers killedeach year. The long-term variance of x is approximatelyσ2 = 136.2. Suppose that for the past 9 years,the variance has been s2...
- Q The Excel file BankData shows the values of the followingvariables for randomly selected 93 employees of a large bank. Thisreal data set was used in a court lawsuit againstdiscrimination.  Let= monthly...
- Q Suppose that the score in a qualifying exam for a certainprofession is normally distributed with mean 80 and standarddeviation 36. Use Excel to find the following probabilities:b) Find the probability...
- Q Suppose the proportion of left-handed individuals in apopulation is θ. Based on a simple random sample of 20, you observefour left-handed individuals. Using Ra) Assuming the sample size is small...
- Q Confidence Level95%SUMMARY STATISTICSGroup 1Group 2n5050Number of Successes2311or Sample ProportionRESULTS*Group 1Group 2Sample ProportionsRisk Difference (RD)SE (RD)ZMargin of ErrorCI for Risk DifferenceLower LimitUpper LimitRelative Risk (RR)CI for Relative RiskLower LimitUpper LimitOdds Ratio...
- Q Stress and weight in rats. In a study of theeffects of stress on weight in rats, 71 rats were randomly assignedto either a stressful environment or a control (nonstressful)environment. After...
- Q There are three urns each containing seven red, five green, andthree white balls, and two old urns each containing five red, threegreen, and seven white balls. The urns are identical...
- Q Paired-/Related Samples T-testUse it to test whether there is a difference between the twoconditions(note: conditions must be RELATED-participants provide ineach condition).You are interested in the relationship satisfaction of youngadults before...
- Q Dr. Xiong, a clinical psychologist, wishes to test the claimthat there is a significant difference in a person's adult weightif he is raised by his father instead of his mother....
- Q A. A new shopping mall is considering setting up an informationdesk manned by one employee. Based on information obtained fromsimilar information desks, it is believed that people will arriveat the...
- Q An inspector has the job of checking a screw-making machine atthe start of each day. She finds that the machine needs repairspairs one day out of ten. When the machine...
- Q In the binomial probability distribution, let the number oftrials be n = 4, and let the probability of success bep = 0.3310. Use a calculator to compute the following.(a) The...
- Q The numbers of words defined on randomly selected pages from adictionary are shown below. Find the​ mean, median, and mode of thelisted numbers. Or is there no mean, median or...
- Q Use the following information to answer the next questions: Weare interested in whether this age group of males fits thedistribution of the U.S. adult population. Calculate the frequencyone would expect...
- Q If n = 19, ¯ x = 43, and s = 17, construct a confidence intervalat a 80% confidence level. Assume the data came from a normallydistributed population. Give your...
- Q The target value for a watch is to lose no time over a year. Asample of 4 watches had the following time gained (lost) inminutes: (-1, -2, 3, -3). Assume...
- Q A factory produces metal links for building long chains used inthe shipping and construction industry. The factory’s R&D unitmodels the length of an individual metal link (in ?m) by a...
- Q You are a creating a portfolio of investments for a retiringperson. The portfolio consists of ten securities. Three of themmust be stocks, and seven of them must be bonds. You...
- Q Many people purchase SUV because they think they are sturdierand hence safer than regular cars. However data have indicated thatthe costs of repair of SUV are higher that midsize cars...
- Q Suppose you wanted to evaluate the performance of the threejudges in Smallville, Texas: Judge Adams, Judge Brown, and JudgeCarter. Over a three-year period in Smallville, Judge Adams saw 26%of the...
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