Statistics question and answers for August 20, 2023
- Q What is the probability that the woman has a diastolic bloodpressure between 60 and 90 mmHg?1. Suppose you have a variable X~N(8,1.5).Among females in the US between 18 and74 years...
- Q Let x be the average number of employees in a group healthinsurance plan, and let y be the average administrative cost as apercentage of claims. Suppose a random sample of...
- Q QUESTION 1:An owner of a home in the Midwest installed solar panels toreduce heating costs. After installing the solar panels, hemeasured the amount of natural gas used yy (in cubic...
- Q A random sample of the price of gasoline from 30 gas stations ina region gives the statistics below. Complete parts a through cbelow.y=​ $3.89​, SE (y) =​$0.06​a) Find a 95​%...
- Q An investment website can tell what devices are used to accessthe site. The site managers wonder whether they should enhance thefacilities for trading via​ \"smart phones\", so they want toestimate...
- Q There are two urns, urn I and urn II. Urn I contains 2 whiteballs and 4 red balls, and urn IIcontains 1 white ball and 1 red ball. A ball...
- Q Verification and Validation of Simulation Models3. How to build a model that is well connected with theverification and validation process?4. What is meant by calibration, and what is the process...
- Q In the United States, males between the ages of 40 and 49 eat onaverage 105.1 g of fat every day with a standard deviation of 4.5 g(\"What we eat,\" 2012)....
- Q Can someone please answer the following 10 Multiple choicequestions? Thank you.An analyst needs to build a forecasting model but he isnot sure whether it has trend or seasonality components. Which...
- Q In the United States, males between the ages of 40 and 49 eat onaverage 105.1 g of fat every day with a standard deviation of 4.5 g(\"What we eat,\" 2012)....
- Q Suppose a random variable, x, arises from a binomial experiment.If n = 22, and p = 0.85, find the following probabilities using anymethod of your choosing (e.g., the binomial formula;...
- Q Airlines have increasingly outsourced the maintenance of theirplanes to other companies. A concern voiced by critics is that themaintenance may be less carefully done so that outsourcing createsa safety hazard....
- Q a. What is data mining?b. What is specification searching?c. Engaging in such behavior when conducting empirical researchis generally viewed negatively? Why?
- Q For the qualitative data, choose one of the outcomes and findthe sample proportion satisfying that outcome. Now construct a 95%Confidence Interval of the Population Proportion of peoplesatisfying that outcome.GenderFrequencyMale3Female36Both Genders...
- Q An ANOVA F test is an extension of aQuestion 1 options:two-sample z test.two-sample t test.two-sample test of proportions.a factorial ANOVA.Question 2 (2 points)SavedA manufacturer of infant formula is running an...
- Q Automated manufacturing operations are quite precise but stillvary, often with distributions that are close to Normal. The widthin inches of slots cut by a milling machine follows approximatelythe N(0.8750,0.0014)distribution. The...
- Q 1. Run a simple regression using payroll inthousands to predict workers compensation premiums in thousandswith a 99% confidence interval.a. Please explain to the risk manager howuseful this model is. (1...
- Q According to Zurmehly article. How was the reliability of theWGC-TA established
- Q We want to compare the mean of the hospital stay by sex at thisparticular Pennsylvania hospital. Let’s assume that the data arenormally distributed and we are assuming that the SD...
- Q According to article Zurmehly article. What type of study designwas utilized and what variables were explained?
- Q Part 1. Demonstrate that you understand basic concept of NormalDistribution. In two small paragraphs describe a couple ofproperties/rules of Normal distribution. Hint: look for KEY FACTSand DEFINITIONS in sections 6.1...
- Q A team of psychologists hypothesize that feeling sick isassociated with liking a flavor. They design a study in which ratsare randomly split into two group. In one group the rats...
- Q A video game player insists that the longer he plays a certaincomputer game, the higher his scores are. The table shows the totalnumber of minutes played and the high score...
- Q 14. A common design requirement is that an environment must fitthe range of people who fall between the 5th percentile for womenand the 95th percentile for men. In designing an...
- Q A dress is marked down 15%, and then it is marked down 25% fromthe discounted price. By what percent is the dress marked down fromthe original price after both discounts?...
- Q A TV manufacture is supplied with a certain component by aspecialist producer. Each incoming consignments is subject to thefollowing quality control procedure. A random sample of 10components is individually tested....
- Q 5. A U.S dime weighs 2.260 grams when minted. A random sample of20 circulated dimes showed a mean weight of 2.248 grams with astandard deviation of .024 grams. Using alpha...
- Q 10. Use the table to answer the questions below.# of late flights# of on time flightsDetla Airlines633Air France543a) If two flights are randomly selected (with replacement) whatis the probability that...
- Q Describe what it means when two events are independent? Whatwould make two events dependent? How does it change the calculationof probability of each?
- Q Using the Motor Trend Car Road Tests dataset mtcars, in farawayR package, fit a model with mpg: Miles/(US) gallon as the responseand the other variables as predictors. (a) Which variables...
- Q Engineers must consider the breadths of male heads whendesigning helmets. The company researchers have determined that thepopulation of potential clientele have head breadths that arenormally distributed with a mean of...
- Q I need to send questionnaire for research study the populationnumber (3500) , am sending it onlinehow to calculate the right number of questionnaires i shouldsend ? and the accepted responses...
- Q In order to find out the probability that a student will bring acar to campus, 100 students are polled. Of those students, 85 havecars to bring to campus.a) Find a...
- Q One of the local hospitals wants to assure that they have enoughnurses for incoming patients needing assistance, especially in theemergency room. To insure there are enough nurses on duty, but...
- Q Floataway Tours has $420,000 that canbe use to purchase new rental boats for hire during the summer. Theboats can be purchased from two different manufacturers. FloatawayTours would like to purchase...
- Q the height in children aged 10-15 is assumed to follow a normaldistribution with a mean of 165 with a standard deviation of15.c)what proportion of children 10-15 years of age have...
- Q Triple A Battery Company is a majorbattery manufacturer of batteries and it produces three types ofbatteries (Type A, B, and C). The batteries are similar inconstruction but carry a different...
- Q Students' heights from Dorm A are normally distributed with amean of 69.4 inches and standard deviation of 1.8 inches. Studentsheights from Dorm B are normally distributed with a mean of...
- Q If T1 and T2 are independent exponentialrandom variables, find the density function of R=T(2) -T(1).This is for the difference of the order statistics not of thevariables, i.e. we are not...
- Q Two states of nature exist for a particular situation: a goodeconomy and a poor economy. An economic study may be performed toobtain more information about which of these will actually...
- Q Suppose that the distribution of scores on an exam is moundshaped and approximately symmetric. The exam scores have a mean of110 and the 16th percentile is 85. (Use the Empirical...
- Q The use of correlation statistics in clinical practice
- Q A university believes that the average retirement age among thefaculty is now 70 instead of the historical value of 65. A sampleof 35 faculty found that the average of their...
- Q When someone buys a ticket for an airline​ flight, there is a0.0973 probability that the person will not show up for the flight.A certain jet can seat 17 passengers. Is...
- Q Question with regards to Statistical Process Control.Control chart systems can operate on two basic methods ofmeasurement. State these two methods and briefly distinguishbetween them, giving three examples of industrial processes...
- Q 9. ANCOVA assumptions also require that the regression slopesfor a covariate are homogeneous. T F10. The sixth assumption for ANCOVA is that the covariate isreliable and is measured without error....
- Q According to a study done by a university​ student, theprobability a randomly selected individual will not cover his orher mouth when sneezing is0.2670.267.Suppose you sit on a bench in a...
- Q In a study of credibility or believability of television newsversus printed news, a sample of 35 adults was selected fromresidents of an urban area in the Midwest. Each person was...
- Q USING EXCEL FORMULAS SOLVE THE PROBLEM. MUST USE EXCELCALCULATIONS AND FORMULAS.!!!Find the data for the problem in the first worksheet namedLightbulbLife of the data table down below It gives the...
- Q Allen's hummingbird (Selasphorus sasin) has been studied byzoologist Bill Alther.†Suppose a small group of 19 Allen'shummingbirds has been under study in Arizona. The average weightfor these birds is x...
- Q In one population, it is found that 6% of all people have highblood pressure and 40% are overweight. Four percent suffer fromboth con- ditions. What is the probability that a...
- Q Researchers at the Mayo Clinic found a significant associationbetween hospital sound levels and patient healing (louder hospitalsound level is associated with slower healing). Based on thesefindings, a new hospital installed...
- Q The 2009 National Household Survey on drug use and healthreported the number (out of 1000) of three age groups: 12-17yearsold, 18-25 years old, and 26 years old, who reported usingcannabis...
- Q You have been given the final results of this study. What areyour conclusions? Describe your conclusions and how you derivedthem.RQ: To what extent does our new composite material improveload-bearing capacity...
- Q All Time Box Office Revenues Aggregated by MonthsRankMonthGrossMovies Tracked1February, 2009796,343,6401612February, 2010745,693,0661733February, 2008659,270,4661934February, 2004666,141,2512015February, 2007693,647,2381766February, 2003613,460,9612077February, 2005692,957,9881858February, 2006652,426,1751939February 2002529,353,34598Calculate the mean for the gross revenues.Calculate the mean for the Movies tracked.Calculate...
- Q Listed below are amount of court income and salariespaid to the town justices. All amounts are in the thousands ofdollars. Construct a scatteplot salaries? Base on the results, doseit appears...
- Q Question # 1:A dispensing machine is set to produce 1 pound lotsof a particular compound. The machine is fairly accurate, producingmean weight of lots equal to 1.0 pound with a...
- Q What is the difference between the Sampling Distribution of aProportion and theSampling Distribution of a Mean? (3 points)What is the mean of the sample means? (2 points)What is the standard...
- 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 5.1 pounds/square inch. It...
- Q i) Once you have calculated a standard deviation, discuss itsmeaning.?ii) Discuss the pros and cons of the using the variance and thestandard deviation in their usefulness in data interpretation.
- Q Construct a scattergram for each data set. Then calculate r andr 2 for each data set. Interpret their values. Complete parts athrough da.x−10123y−30145Calculate r.r=. 9853 ​(Round to four decimal places...
- Q 4. How many different ways can you put 8 balls in 8 boxes A1, .. . , A8if (a) the balls are all different and no box is empty 8!(b)...
- Q This has been previously answered but I don'tunderstand, no one did the Ho and Ha, could someone please explainstep by step with formulas?A realtor wishes to compare the square footage...
- Q # Reading the data into R:my.datafile <- tempfile()cat(file=my.datafile, \" 71 15 74 19 70 11 71 15 69 12 73 17 72 15 75 19 72 16 74 18 71...
- Q Question 4: The HR department of a large company needs to assigna newly hired director to either their marketing development ortheir marketing operations division. To help in their decision,they organize...
- Q Solve the following question.The following is the 8 week sales data for a Kashmiri tea housecomprising the number of customers (in hundreds) and weekly sales(in thousand SRs).No of Customers159402025251535Weekly Sales0604160613091016Find...
- Q Please i need a detailed explanation of this short articleThinking of the many variables tracked by hospitals and doctors'offices, confidence intervals could be created for populationparameters calculated frommany of them....
- Q The accuracy of a census report on a city in southern Californiawas questioned by some government officials. A random sample of1215 people living in the city was used to check...
- Q 5. A driver encounters two traffic lights on the way to workeach morning. Each light is either red, yellow, or green. Theprobabilities of the various combinations of colors is given...
- Q Repeat analyses of the sulphate in ground waters using agravimetric analysis technique yielded the following data forsuccessive samples: 27.4, 27.6, 25.2, 27.3, 27.3 ppm sulphate.Using 95% confidence criteria which of...
- Q Find confidence interval and perform a hypothesis testfor the mean of one population.The economic dynamism, which is the index of productive growthin dollars for countries that are designated by the...
- Q Suppose that the distribution of the weights of bags of carrotsfrom brand A is N(1.2,0.049) and the distribution of the weights ofbags of carrots from brand A is N(3.5, 0.081)....
- Q The marketing manager of a large supermarket chain would like touse shelf space to predict the sales of pet food. A random sampleof 12 equal-sized stores is selected, with the...
- Q In a genetics experiment, investigators looked at 300chromosomes of a particular type and counted the number ofsister-chromatid exchanges n each. A Poisson model was hypothesizedfor the distribution of the number...
- Q Read the article \"Interval Training\" by Christine M.Anderson-Cook. Pick an interval type and explain the concept of theinterval type through an example.
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