Statistics question and answers for July 10, 2023
- Q in the medical trial context, define the term ofresearch misconduct/fraud
- Q 1. You are a teacher and want to analyze if your morning classhas significantly different scores than your afternoon class. Youhave 12 students in both of your classes. Compute a...
- Q In our rental shop case, we know that on the busiest day we canexpect 150 rentals, which forms the number of independent events ortrials. We also know that, historically, 60%...
- Q Conception about the hypothesis test.Question: can the data be test by poission distributionH0: it can be test by poissionH1: it cant be test by poission modelFinal: we fail to reject...
- Q A clinical lab wants to evaluate the resistance power of itsnew medicine. It has provided the new medicine to a random sampleof 300 rats and retained the old drug for...
- Q The average income of 19 families who reside in a largemetropolitan East Coast city is $62,245. The standard deviation is$9695. The average income of 12 families who reside in a...
- Q A New England Journal of Medicine study (November 1986) foundthat a substantial portion of acute hospital care is reported to beunnecessary. The physicians who conducted the study reviewed themedical records...
- Q A real estate expert wanted to find the relationship between thesale price of houses and various characteristics of the houses. Hecollected data on five variables, recorded in the table, for...
- Q Please make sure to display your thought process? It isimperative to be able to follow how the answer was deduced. Pleasebe as thorough as possible. Please address all parts of...
- Q Assume that adults have IQ scores that are normally distributedwith a mean of 95.8 and a standard deviation of 22.4. Find theprobability that a randomly selected adult has an IQ...
- Q Which of the following statement about charts is true?The more data ink, the betterData ink can sometimes help tell a richer storyWe should make as many grids as possible in...
- Q Each Sunday I go to a bakery shop to buy a dozen (12) bread.Beginning on that Sunday and continuing through the followingSaturday (7 days) I consume either 1 or 2...
- Q The housing market has recovered slowly from the economic crisisof 2008. Recently, in one large community, realtors randomlysampled 30 bids from potential buyers to estimate the average lossin home value....
- Q Before lending someone​ money, banks must decide whether theybelieve the applicant will repay the loan. One strategy used is apoint system. Loan officers assess information about the​applicant, totaling points they...
- Q In 1975 the journal Environmental News reported that a number ofcommunities in Boston showed elevated levels of lead in thedrinking water supplies. Water testing was done on a random sampleof...
- Q Multiple ChoiceSelect the best answer from the available choices foreach question.1.  Three people are acting in a play. Character Ahas 50% of the lines, Character B has 40%, and Character...
- Q General Social Survey askedparticipants if they thought it was “OK†for a woman to get anabortion for any reason and also asked them for their politicalparty affiliation. The table below...
- Q Find the critical value, tc, for c=0.95 and n=41.
- Q YearQuarterSPeClty200634480.7745827.48200715602.8425269.7434945.6745124.22200814996.3125147.6134903.3244960.84200914864.1624785.2134684.4344732.58201014947.6324826.2134801.4644789.05201114812.6924787.6534871.3144756.61201214583.1524659.0934587.5544746.01201314556.6324632.5734561.0344719.49201414516.8524592.7834521.2444844.6201514588.5424571.8434671.2445011.6201614821.5424916.8434791.3145183.49201715045.3825138.9734915.3745369.34201815379.832548135265.3145579.14201915743.9825750.0135542.86a) in a paragraph write about Trend andSeasonality of this store.b) write about Regression model(s) and examinehypothesesc) what is the least square regression line?d) write about standard error and interpret...
- Q A customer service operator receives, on average, 6calls per week asking for assistance.a. What is the type of distribution? Why?b. For any randomly selected week, find the probability that theoperator...
- Q Given two independent random samples with the following results:n1=13x‾1=180s1=21   n2=9x‾2=163s2=30 Use this data to find the 99%confidence interval for the true difference between the populationmeans. Assume that the population variances are...
- Q Health researchers believe that theneonatal mortality rate is higher at home (MRH) than that in thehealth centers (MRC). The neonatal mortality rates (both MRH andMRC) for 20 countries are recorded...
- Q A dentist wants to find the averagetime taken by one of her hygienists to take X-ray and clean thetooth for her patients. She recorded the time to serve 24 randomlyselected...
- Q Given that Z is a standard normal random variable, find z foreach situation using the Norm.S.Inv function in excel.a. The area to the right of z is .01b. The area...
- Q Suppose the mean and the standard deviation of the waiting timesof passengers at the bus station near the Cross Harbour Tunnel are11.5 minutes and 2.2 minutes, respectively.(a) Assume the waiting...
- Q A psychology quiz consists of ten multiple choice questions(each question is of worth 1 mark) with 5 options per question. Astudent knows the correct answer to 5 of the questions,...
- Q Answer the following questions:1. In the following scenarios, identify whether or not it isuniform, binomial, or hypogeometric probabilitydistribution. Briefly explain your choice.[Do not solve the problem]a) A spinner is split...
- Q Some students do homework with the tv on. some researchers wantto see if people can work as effectively with as withoutdistraction. the researchers will time some volunteers to see howlong...
- Q Your friend owns a retail store where she plans to give arrivingcustomers a short verbal â€commercial†message regarding productsfor sale. Your friend asks you to determine if this will boost...
- Q For an adult male the average weight is 179 pounds and thestandard deviation is 29.4 pounds. We can assume that thedistribution is Normal (Gaussian). Answer the following questionseither via simulations...
- Q Births are approximately Uniformly distributed between the 52weeks of the year. They can be said to follow a Uniformdistribution from 1 to 53 (a spread of 52 weeks). Round answers...
- Q All the procedures should be done with 5% P-value or 95%confidence interval.Some answers are approximated, choose the mostappropriate answer. Open Pollution data. SETUP: Since wind clearsthe air, some people believe...
- Q John East Canneries only select the smallest 20% of sardines fortheir factories. If the length of sardines is normally distributedwith a mean ofμ = 30 cms and a standard deviation...
- Q hey im having trouble with thisUse Excel to find the Standard Normal Probability for thefollowing questions. Don't forget to sketch the normal distributionand shade the required area.a) What is the...
- Q If X1,...Xn are normally distributed random variables. is thesample mean an unbiased estimator for the median? can you explainwhy or why not?
- Q ***SHOW SPSS**A researcher is interested to learn if there is a linearrelationship between the hours in a week spent exercising and aperson’s life satisfaction. The researchers collected the followingdata from...
- Q The human resources department of a very large organisation istrying to determine the proportion of all employees that aresatisfied with their current position. They randomly select 121employees and ask them:...
- Q What is the difference between ordinal data and ratio data? Whatis the variance for problem number 3? #3 Identify the mode andmedian of the following data. Compute the mean, range...
- Q what type of research questions and hypothesis would be created fora quantative causal comparativestudy that examines how the impact of development on theoverall college student populations?
- Q A luxury hotel believes that 90% of their customers are verysatisfied with its service. A random sample of 120 guests weresurveyed to determine how satisifed they are with the service...
- Q 1. A new method of packaging eggs is being tested. The manageris interested in estimating the proportion of eggs that will bebroken upon delivery. A shipment of 3000 eggs was...
- Q 1-A contractor decided to build homes that will include themiddle 80% of the market. If the average size of homes built is1750 square feet, find the maximum and minimum sizes...
- Q a bank found that the average monthly checking balance of itscustomers is $10000 with a standard deviation of $4500. a randomsample of 12 accounts is selected.1. what is the probability...
- Q An article in Electronic Packaging and Production (2002, vol.42) considered the effect of X-ray inspection of integratedcircuits. The radiation dose (rads) were studied as a function ofcurrent (in milliamps) and...
- Q How many ways are there to distribute 30 identical apples among4 kids so that each kid gets at least 1 apple but no kid gets morethan 20 apples.
- Q Analysis of the tensile strength of 100 samples of a newpolymeric material, obtained from each of the two production linesof a company gave the following mean and standard deviation values(in...
- Q Please type responses as it is difficult for me to see writtenresponses. Thank you1) How does understanding the correlation between variables helpus understand regression?2) Provide two ways on how you...
- Q Build a garch model using the following monthly change data for Mexico. Use RDATEINFLATIONene-054.54feb-054.27mar-054.39abr-054.6may-054.6jun-054.33jul-054.47ago-053.95sep-053.51oct-053.05nov-052.91dic-053.33ene-063.94feb-063.75mar-063.41abr-063.2may-063jun-063.18jul-063.06ago-063.47sep-064.09oct-064.29nov-064.09dic-064.05ene-073.98feb-074.11mar-074.21abr-073.99may-073.95jun-073.98jul-074.14ago-074.03sep-073.79oct-073.74nov-073.93dic-073.76ene-083.7feb-083.72mar-084.25abr-084.55may-084.95jun-085.26jul-085.39ago-085.57sep-085.47oct-085.78nov-086.23dic-086.53
- Q Assume the life of a roller bearing follows a Weibulldistribution with parameters β=2 and δ=7,500hours.Determine the probability that the bearing will last at least8000 hours.Determine the expect value and the...
- Q LetY1, ..., Yn be a random sample with the pdf:f(y;θ)= θ(1-y)^(θ-1) with θ>0 and 0<y<1.i) Obtain the minimum variance unbiased estimator ( forθ)
- Q The statement -- Researchers are interested tocompare height of three species of rhino Asian, African, andSumatran. These species are geographically isolated and believed tobe different in their size. Twenty rhinos...
- Q Alice, Bob, and Chuck are three students who go out for coffeeevery day. But every day, they randomly determine who pays for thethree coffee. If Alice pays for the coffee...
- Q Until 2002, hormone replacement therapy (HRT), estrogen and/orprogesterone, was commonly prescribed to post-menopausal women.This changed in 2002, when the results of a large clinical trialwere published.8506 women were randomized to...
- Q Coffee is a leading export from several developing countries.When coffee prices are high, farmers often clear forest to plantmore coffee trees. Here are data on prices paid to coffee growersin...
- Q Effects of a Pre-workout Energy Drink Supplement on Upper BodyMuscular Endurance PerformanceThe use of pre-workout beverages is becoming an increasinglycommon method of improving performance during exercise in athleticand recreationally active...
- Q 1. This assignment focuses on the architecture of the Poisson,Negative Binomial, Zero-Inflated Poisson and Zero-Inflated NegativeBinomial regression models.A. In which context Poisson regression can be employed, pleaseprovide some examples?B. What...
- Q A hobbyist family is making PPE (personal protective equipment)to donate to local health care workers. Let• T1 ∼ U(1,4) be the amount of time (in hours) to 3D print aface...
- Q An urn contains 7 black balls, 4 red balls, 3 white balls and 1blue ball, and a player is to draw one ball. If it is black, hewins $1, if...
- Q Using the data below, test the null hypothesis that the variancein the Close Ratio for the sample of employees is at most 1.5% at5% significance level.Years EmployedGenderCertifiedPrior BackgroundClose RatioSales7MYY44.40%$Â Â Â 201,5008MYY54.20%$Â Â Â 129,0004MYY60.70%$Â Â Â 101,1008MNN42.60%$Â Â Â Â Â Â 99,7006MYN68.30%$Â Â Â Â Â Â 98,1006MNN37.90%$Â Â Â Â Â Â 93,9002MNN29.50%$Â Â Â Â Â Â 90,8002MNN42.40%$Â Â Â Â Â Â 90,6007MYY37.70%$Â Â Â Â Â Â 89,2002MNN35.00%$Â Â Â Â Â Â 86,6002MNN45.80%$Â Â Â Â Â Â 83,9003MNN50.70%$Â Â Â Â Â Â 80,0004MYY29.80%$Â Â Â Â Â Â 77,3007MNN38.70%$Â Â Â Â Â Â 67,1005MYY62.20%$Â Â Â Â Â Â 58,9003MYY63.20%$Â Â Â Â Â Â 56,6006MNN18.60%$Â Â Â Â Â Â 54,7003FYY32.00%$Â Â Â 126,3004FYY50.00%$Â Â Â Â Â Â 95,8009FYY51.70%$Â Â Â Â Â Â 93,1002FNY29.20%$Â Â Â Â Â Â 91,6002FNN58.20%$Â Â Â Â Â Â 89,0004FYY44.00%$Â Â Â Â Â Â 82,3008FYY67.70%$Â Â Â Â Â Â 81,0006FNY61.20%$Â Â Â Â Â Â 78,2007FNY54.40%$Â Â Â Â Â Â 71,3008FNY38.60%$Â Â Â Â Â Â 67,5002FYY40.40%$Â Â Â Â Â Â 64,8004FNY41.50%$Â Â Â Â Â Â 57,2002FNY40.70%$Â Â Â Â Â Â 54,1002FNY36.30%$Â Â Â Â Â Â 51,700
- Q QUESTION5Â Â Â Â Â Â The Layton Tire and Rubber Company wishes to set a minimummileage guarantee on its new MX100 tire. Tests reveal the meanmileage is 67900 with a standard deviation of 2050 miles...
- Q The (mixed) random variable X has probability density function(pdf) fX (x) given by:fx(x)=0.5δ(x−3)+ { c.(4-x2), 0≤x≤20, otherwisewhere c is a constant.(a) Sketch fX (x) and find the constant c.(b) Find...
- Q In deciding where to invest her retirement fund, an investorrecorded the weekly returns of two portfolios for one year, withthe results stored in columns 1 and 2. Some of these...
- Q The Australian Bureau of Statistics has reported that in 2015,26.78% of the 16.8 million employees in Australia worked part-timein their main job. Suppose that you select a random sample of...
- Q Question:5What is meant by the standard error of the mean?What is meant by a Type I and a Type II error?What is the difference between a one and two tail...
- Q Question: 2 The data below shows the amount of money in millionsof shillings paid out suppliers by firm over a certain period oftime 7.0 4.1 3.4 5.5 4.5 6.6 7.3...
- Q A company claims to manufacture paper clips with a standarddeviation of less than 0.12g. Aset of 71 paper clips has a sample standard deviation of 0.10 g. Isthe claim supported...
- Q You are working with the marketing team for a FMCG firm thatproduces shaving cream. The team believes that sales of some of theproducts are closely related to sales of other...
- Q Chi-square analysis compares the counts of two categoricalvariables to tell you if a relationship exists between thevariables or not. You can apply chi-square analysis to answerimportant questions about factors in...
- Q A corporation monitors time spent by office workers browsing theweb on their computers instead of working. The computer records ofa random sample of 101 workers showed that 9 of them...
- Q (a) Using the armspanSpring2020.csv data from class, test thehypothesis that those who identify as female have a shorter armspanthan those who do not so identify. Write out the null andalternative...
- Q 4) We're going to test the same hypothesis four ways. Assume thepeople in the dataset in armspanSpring2020.csv are a random sampleof all adults. For each test, report the test statistic...
- Q Thinking of the many variables tracked by hospitals and doctors'offices, confidence intervals could be created for populationparameters (such as means or proportions) that were calculated frommany of them. Choose a...
- Q If a regressionanalysis was to be completed on body mass index (BMI), what couldbe an independent variable in that analysis? Why? If we could, whatother independent variables should be included...
- Q There are 10 democrats and 8 Republicans on a senate committee.From this group a 5- member subcommittee is to be formed. Find thenumber of 5-person subcommittee that consists of:a)Any members...
- Q Question:4A new promotion by K2 has been developed with a goal ofobtaining 90% new simcard connections among business firms. Toevaluate the simcard sales, 20 are to be sold to business...
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