Basic Math question and answers for September 27, 2023
- Q In a city, the racial make up is 68% White, 24% Black, 5% Asianand the remainder are classified as Other. A report on trafficstops by police officers in this city...
- Q A starting lineup in basketball consists of two guards, twoforwards, and a center. (a) A certain college team has on itsroster three centers, five guards, three forwards, and oneindividual (X)...
- Q 5.23260875351.3399714.5593477083.04703304.55008824611.7195713.38656665928.0454810.9890646180.20260204.55566827367.8321814.18640512953.0632811.20715076978.4335203.44579254314.4672512.96297526623.1041100.17361240465.7081702.76881537165.2819812.74736743497.8220114.48688293377.452314.8246786950.74355105.58620672448.6518612.75538638173.4539211.78790197797.3650415.95138580290.8569112.73755692315.4429305.4088949834.15711201.7158598240.93788201.27884490674.5977102.51427704497.3234113.18705800838.6771414.94977715987.9108915.94880207699.4570414.5885485573.2200614.9445932512.00286504.09509292930.8250311.58025561681.4297915.58216868877.3715511.40987529773.855614.17357157410.7841203.40538452776.0895715.30374658891.1302812.64633861930.7673905.64844855824.4756305.4601626086.44890712.53040027992.7531115.28241078226.0569614.79870918542.1211614.30005570557.2011914.7295024046.52354702.47661260455.630913.19013300567.0592711.02146315377.0735710.73375009895.8622712.7241562324.53332904.23273000596.124671For a column of data x and a column of data y, there is an equationthat relates the slope of the line of best fit (m) with thecorrelation coefficient (r)....
- Q Investment advisors might subscribe to the Business Times (BT)or Straits Times (ST). For those investment advisors who subscribeto at least one of the papers, one-third subscribe to only onenewspaper, ST,...
- Q The government conducts a survey of the population and findsthat 208 of 681 respondents report voting for party A lastelection, and 284 of 512 respondents report voting for party A...
- Q please solve by hand
- Q You are Susan Dean, a 35 year old woman who has always beeninterested in owning your own business. You graduated from GorhamHS, attended SMCC, eventually transferring to USM where you...
- Q An insurance company issues a one-year $1,000 policy insuringagainst an occurrence A that historically happens to 3 out of every100 owners of the policy. Administrative fees are $25 per policyand...
- Q I am trying to find anappropriate statistical test to run for a research study usingsomeone else's gathered data (so that no IRB process is needed). Intheir data they present:Likelihood of...
- Q Question 1 -BinomialsEighty percent of thestudents applying to a university are accepted. Using the binomialprobability tables or Excel, what is the probability that among thenext 15 applicants:Exactly 6 will beaccepted?At...
- Q Current technology uses lasers for the inspection ofsolder-joint defects on printed circuit boards (PCBs). A particularmanufacturer of laser-based inspection equipment claims that itsproduct can inspect on average at least 10...
- Q GMAT (assume to be distributed Normally with a mean 500and a standard deviation of 100) and GRE (assume to be distributedNormally with a mean 300 and a standard deviation of...
- Q A retail giant, Mississippi, sells books on its website. Thebook Lisa Panner and the Accountant’s Ledger (LP for short) is soldin the hardcover version, paperback version, audiobook version, orthe e-book...
- Q Name if the following are discrete or continuous variables. Alsoname if the scenario is ratio, ordinal, nominal, orinterval The different heights of children in afourth-grade class- The divisions of the...
- Q Use the distribution in the form of the stem-leafplot.Stem Leaves1 14782 012378883 189 16/ The mid-point of the third class isA./ 32 B/ 36C/ 34.5 D/ 3517/ The median isA./ 24 B/ 23 C/ 25 D/518/ The...
- Q Researchers use Elisa to test for Lyme disease. Lyme diseaseinfects 0.0009 of the US population each year. The test has adetection rate of 0.98 and a false positive rate of...
- Q A company is to hire two employees. They have prepared a finallist of eight candidates, all of whom are equally qualified. Ofthese eight candidates, five are women. If the company...
- Q 1.Assume that the heights of adult women are normallydistributed with a mean height of 160 centimeters and the standarddeviation is 8 centimeters.What percentage of individuals have heights less than 160centimeters?2....
- Q A survey is taken among customers of a fast-food restaurant todetermine preference for hamburger or chicken. Of 200 respondentsselected, 75 were children and 125 were adults. 120 preferredhamburger and 80...
- Q A random sample of 43 taxpayers claimed an average of $9,853 inmedical expenses for the year. Assume the population standarddeviation for these deductions was ?2,418. Construct confidenceintervals to estimate the...
- Q In looking at our class’s data as a sample of a largerpopulation of students (who have taken, are taking, or may oneday take this class), we find that the mean...
- Q A small independent physicians' practice has three doctors. Dr.Sarabia sees 41% of the patients, Dr. Tran sees 32% , and Dr.Jackson sees the rest. Dr. Sarabia requests blood tests on...
- Q Calculate and interpret the three aspects of DescriptiveAnalysis for weekly return: Location, Shape and Spread. Hint: makesure you interpret these measures in the context of the data andpay attention to...
- Q Diameters of 30 rivet heads in 1/100 of an inch are givenbelow:6.626.666.76.736.766.86.626.686.726.746.766.816.646.76.726.746.766.816.666.76.726.746.776.816.666.76.726.756.786.82Prepare a Stem-and-leaf plot of the sample, and comment.What is the modal diameter of the rivets?Calculate coefficient of skewness,...
- Q The article "College Graduates Break Even by Age 33" reportedthat 5.7% of high school graduates were unemployed in 2008 and 9.7%of high school graduates were unemployed in 2009.† Suppose that...
- Q An investment advisor claimed that BIT return is 2%. Do youagree? Justify your reasoning using a two-tailed hypothesis testapproach at the significance level of 5% in Excel.DateWeekly Return BIT11/3/13-46.1618/3/13-0.0125/3/1339.231/4/1313.078/4/1323.9315/4/1341.3622/4/1326.529/4/1320.396/5/1325.513/5/1342.5220/5/1337.8800127/5/1315.663/6/1320.9810/6/1325.2817/6/1311.9724/6/13-2.461/7/1314.958/7/13-3.515/7/13-822/7/13-0.0529/7/1325.495/8/134.09999812/8/139.52999919/8/1358.7526/8/1336.122/9/1347.879/9/1343.0916/9/1342.0823/9/1340.2400130/9/1351.777/10/1393.5214/10/13113.8921/10/13133.528/10/13231.054/11/13447.0811/11/13874.5518/11/131091.9925/11/13916.272/12/13927.81999/12/13681.7816/12/13789.1123/12/1389930/12/13937.926/1/14877.113/1/1490020/1/14828.9927/1/147503/2/1464010/2/14628.3717/2/1455024/2/14574.733/3/14569.5310/3/14546.8317/3/1446024/3/14418.3131/3/143757/4/14467.5414/4/1436921/4/14402.1628/4/143565/5/14410.912/5/14548.6619/5/14652.7126/5/146502/6/14571.719/6/1459016/6/1456523/6/14561.230/6/14592.147/7/14514.1214/7/14500.8421/7/14565.9328/7/14587.764/8/14484.9711/8/1444318/8/14410.5325/8/14437.921/9/14462.438/9/14324.4415/9/14360.1522/9/14253.3629/9/14381.646/10/14385.5513/10/14349.9820/10/14319.927/10/14340.983/11/14363.9610/11/14348.0917/11/14371.524/11/143761/12/14319.558/12/14334.9715/12/14343.4622/12/14262.829/12/14250.095/1/15190.0212/1/15380.5119/1/15189.4826/1/15209.592/2/15223.99/2/15223.516/2/15254.8523/2/15251.342/3/15305.869/3/15249.8216/3/1528023/3/15220.5630/3/15279.946/4/1526513/4/1520020/4/15224.6827/4/15195.914/5/15245.0311/5/15227.3618/5/15269.6925/5/15228.81/6/15220.58/6/15212.8715/6/15225.6222/6/15262.1829/6/15343.586/7/15312.1513/7/15301.9620/7/1531527/7/15262.043/8/15229.0810/8/15257.5317/8/15220.424/8/15249.4631/8/15230.87/9/15223.2714/9/15246.4821/9/15250.6628/9/15239.595/10/15273.5312/10/15300.0119/10/15377.6926/10/15451.392/11/15371.799/11/15376.8916/11/15418.3923/11/15440.5830/11/15505.467/12/15516.2414/12/15481.2121/12/15482.3828/12/15542.24/1/16454.2811/1/16473.9218/1/16432.5825/1/16429.391/2/16467.058/2/16509.6115/2/16506.6822/2/16448.0729/2/16443.697/3/16484.5814/3/16489.9721/3/16485.8228/3/16455.664/4/16474.9311/4/16516.1918/4/16488.2825/4/16555.872/5/16542.679/5/16512.7516/5/16601.2723/5/16688.6930/5/16803.096/6/16953.0513/6/16805.6520/6/16797.0827/6/16771.544/7/16795.0111/7/16793.5218/7/16723.1825/7/16687.931/8/16650.58/8/1666015/8/1667022/8/16715.629/8/167145/9/16734.9912/9/16686.219/9/16719.4226/9/16715.573/10/1675410/10/16761.0217/10/1682524/10/16825.8331/10/16831.97/11/16900.5214/11/16902.9721/11/16924.2728/11/16975.25/12/161006.212/12/161135.9419/12/161281.426/12/161144.412/1/17995.169/1/171123.216/1/171138.3423/1/171247.7430/1/171241.486/2/171275.9513/2/171453.4620/2/171590.2727/2/171549.16/3/171262.2713/3/171177.6120/3/171372.8827/3/171512.833/4/171488.7510/4/171583.4617/4/171681.7124/4/172096.671/5/172495.078/5/172760.8515/5/172994.7922/5/173393.2729/5/173789.465/6/173488.8612/6/173403.3119/6/173242.7626/6/173315.513/7/17241010/7/173441.517/7/173429.7424/7/173960.5331/7/175218.147/8/175198.7614/8/17552021/8/175918.428/8/175219.464/9/174493.0511/9/174525.3818/9/175465.3625/9/175787.352/10/177126.769/10/177613.9316/10/177918.6523/10/179592.3930/10/177824.896/11/1710593.5513/11/1712197.9920/11/1714924.1927/11/1721084.874/12/1725886.5511/12/1718839.7918/12/1718950.7425/12/1722762.211/1/1818941.518/1/1815048.3715/1/1814345.1222/1/1810125.8229/1/1810282.725/2/1813238.4512/2/1812200.7219/2/1814663.9426/2/1812043.735/3/1810546.8812/3/1810939.1919/3/188735.9826/3/189030.392/4/1810554.329/4/1811257.2116/4/1812332.7623/4/1812582.6230/4/1811460.037/5/1811218.4614/5/189652.0221/5/1810133.128/5/188856.314/6/188617.1911/6/188152.9118/6/188389.0525/6/188853.632/7/188455.529/7/189847.2816/7/1811014.0623/7/189459.8130/7/188619.776/8/188820.4413/8/189072.4920/8/189981.2227/8/188702.433/9/188958.8310/9/189018.2217/9/189039.6824/9/189164.691/10/188635.748/10/188905.4815/10/188919.6122/10/188808.9729/10/188741.395/11/187479.2412/11/185335.5719/11/185486.6526/11/184814.893/12/184340.4410/12/185496.1817/12/185356.2624/12/185586.631/12/184808.147/1/194862.3414/1/194842.0921/1/194634.2428/1/195032.334/2/194983.211/2/195113.9918/2/195240.0925/2/195455.144/3/195526.4511/3/195517.5318/3/195638.0925/3/197153.711/4/197114.668/4/197337.2615/4/197305.2522/4/198020.4129/4/199862.316/5/1911784.9413/5/1912517.3520/5/1912506.9427/5/1910883.833/6/1912861.2610/6/1915472.8717/6/1915080.1624/6/1916268.051/7/1914557.088/7/1914957.7315/7/1913791.5922/7/1916032.8929/7/1916937.565/8/1915248.7912/8/19
- Q 4.14 A survey conducted by the Northwestern UniversityLindquist-Endicott Report asked 320 companies about the proceduresthey use in hiring. Only 54% of the responding companies review theapplicant’s college transcript as part...
- Q Problem 4A study of 250 randomly selected smokers who tried to quitsmoking with nicotine patch therapy is conducted. After the study,it is found that 60% are still smoking a year...
- Q Calculate the weekly return for BIT and construct a histogramin Excel. Does the data on return rates appear normallydistributed? On the basis of z-scores do you find evidence ofoutliers? Hint:...
- Q Question 5 A researcher is undertaking an early stageinvestigation into the possible effect of a food additive on theweight of rats. The additive is a “designer” chemical aimed atincreasing growth...
- Q Section 3.1 Measures of Central TendencypH in Water:The acidity of alkalinity of asolution is measured using pH. A pH less than 7 is acidic; a pHgreater than 7 is alkaline....
- Q uppose that the longevity of a light bulb is exponential with amean lifetime of eight years. (a) Find the probability that a lightbulb lasts less than one year. (Round your...
- Q Arsenic occurs naturally in very low concentrations. In healthyhuman adults arsenic blood concentrations are approximatelyNormally distributed with mean 3.9 ?g/dL (micrograms per decilitre)and standard deviation 1.4 ?g/dL. For the purposes...
- Q 3.* Public transportationand the automobile are two methods an employee can use to get towork each day. Samples of times recorded for each method are shown.Times are in minutes. Public Transportation: 18 ...
- Q The Chartered Financial Analyst (CFA®) designation is fastbecoming a requirement for serious investment professionals.Although it requires a successful completion of three levels ofgrueling exams,it also entails promising careers with lucrativesalaries....
- Q You work for a large retailer and have been asked to estimatethe proportion of your customers that are less than 30 years old.You have sampled a large number of stores...
- Q In automobile mileage and gasoline-consumption testing, 6automobiles were road tested for 300 miles in both city and highwaydriving conditions. The following data were recorded formiles-per-gallon performance. City 16.2 16.7 15.9...
- Q 3)A sample of midterm grades for five students showed the results:72, 65, 82, 90, and 76. Based on the data, which of the followingstatements are correct, and which should be...
- Q Hello,I need assistance in explaining this output,CoefficientsaModelUnstandardizedCoefficientsStandardizedCoefficientstSig.BStd. ErrorBeta1(Constant)184.1031.96893.533.000TOTAL FRUITS CONSUMEDPER DAY-.031.011-.076-2.910.004TOTAL VEGETABLESCONSUMED PER DAY.001.009.003.120.904a. Dependent Variable:REPORTED WEIGHT IN POUNDS
- Q Let X be a exponential random variable with pdf f(x) = ?e??x forx > 0, and cumulative distribution function F(x).(a) Show that F(x) = 1?e ??x for x > 0,...
- Q If I have two dice A and B, and I roll it twice, we have theoutcomes A1, A2, B1, B2. Let X = A1+ A2, Y= B1+B2. What is theprobability...
- Q An important step increating confidence intervals for proportions is to check whetherthe success/failure conditions have been met otherwise the intervalcreated will not be valid (i.e. we should not have created...
- Q Im doing an econometric assignment and need to use the programSTATA do estimate some linear regressions.The dataset provided is the "natural log" of each variable.What does the natural log mean?...
- Q Suppose that the distance of fly balls hit to the outfield (inbaseball) is normally distributed with a mean of 255 feet and astandard deviation of 37 feet. Let X be...
- Q On average, indoor cats live to 15 years old with a standarddeviation of 2.7 years. Suppose that the distribution is normal.Let X = the age at death of a randomly...
- Q Suppose a fitness center has two weight-loss programs. Fifteenstudents complete Program A, and fifteen students complete ProgramB. Afterward, the mean and standard deviation of weight loss foreach sample are computed...
- Q Components of a certain type are shipped to a supplier inbatches of ten. Suppose that 50% of all such batches contain nodefective components, 32% contain one defective component, and 18%contain...
- Q Does anyone know how to do it on EXCEL?Does anyone know how to do it on EXCEL?Does anyone know how to do it on EXCEL?Does anyone know how to do...
- Q Light BulbsA red light bulb has been flashing forever, according to aPoisson process with rate r. Similarly, a blue bulb has beenflashing forever, according to an independent Poisson process withrate...
- Q UNAM is known to have a completion rate of 35% with a varianceof 6.25%. A Research fromNRCT claims that the variance of UNAM completion rate is not asreported. A sample...
- Q We consider a randomized experiment, the Tennessee STARexperiment, where students and teachers are randomly assigned toeither a small class (15 students) and a regular class (24students).We want to estimate the...
- Q Ten randomly selected people took an IQ test A, and next daythey took a very similar IQ test B. Their scores are shown in thetable below.Person A B C D...
- Q In a random sample of? males, it was found that 23 write withtheir left hands and 217 do not. In a random sample of? females, itwas found that 66 write...
- Q A cross-sectional survey was conducted on adults (³20 years ofage) residing in the Khairpur district in Sindh province ofPakistan. One objective of the survey was to evaluate therelationship of social...
- Q A study was conducted to determine the proportion of people whodream in black and white instead of color. Among 300 people overthe age of? 55, 65 dream in black and?...
- Q The following table lists the weight of individuals before andafter taking a diet prescribed by a weight-loss company for amonth:Weight-loss Data:Individual: A, B, C, D, E, FWeight Before (lb): 123.7,...
- Q An education minister would like to know whether students atGedrassi high school on average perform better at English or atMathematics. Denoting by ?1 the mean score for all Gedrassistudents in...
- Q Chapter 6: Normal Probability (These problems are like theproblems in Section 6.2). Using a Normal Distribution to findprobabilities: Use the table E.2 in your text. Draw a sketch andindicate what...
- Q A random sample of 862 births included 434 boys. Use a 0.10significance level to test the claim that 50.7?%of newborn babies are boys. Do the results support the beliefthat 50.7?%of...
- Q A sample of 26 offshore oil workers took part in a simulatedescape exercise, resulting in the accompanying data on time (sec)to complete the escape:383352354360379423324397402374375370362366366327339394390369377357354407330397(a) Construct a stem-and-leaf display of the...
- Q Find the critical value for a? right-tailed test witha=0.01andn=75.
- Q The following weights in kilograms were recorded for a hockeyteam:73 75 76 77 78 86 81 75 100 92 82 73 85 7984 92 80 78 77 81 83 74...
- Q 2. The data set (Concrete1.xlsx) contains the compressivestrength, in thousands of pounds per square inch (psi), of 30samples of concrete taken two and seven days after pouring.(You need to use...
- Q Construct 90%, 95%, and 99% confidence intervals forthe population mean, and state the practical and probabilisticinterpretations of each. Indicate which interpretation you thinkwould be more appropriate to use. Explain why the...
- Q Can someone show me how to do this onexcel?Question involves cell phone users.Mean monthly data usage = 5.8 GB/monthStDev monthly data usage = 2.5 GB/month"Heavy users" are those that use...
- Q In a certain congressional district, it is known that 40% of theregistered voters classify themselves as conservatives. If tenregistered voters are selected at random from this district, whatis the probability...
- Q Crusty’s has collected data for the last ten days for the timefrom when an order is taken until the pizza is finished (see followdata) (five samples are taken each day).Daysample...
- Q I used this code for parts a-d:x=runif(1e6,1,5)mean(x)var(x)hist(x,main="Histogram ofx",xlab="x",ylab="f(x)",border="blue",col="green",freq=F)Write R code that does the following: Let Xi be a randomvariable uniformly distributed between 1 and 5. (a) Find E[Xi ] andVar(Xi).(b)...
- Q A certain railway company claims that its trains run late 5minutes on the average. The actual times (minutes) that 10 randomlyselected trains ran late were provided giving a sample mean...
- Q Please use R to do it.Using the SATGPA data set in Stat2Data package. Test by using ?=.05Question: Test if the proportion of MathSAT greater thanVerbalSAT is 0.60> library(Stat2Data)> data("SATGPA")> data(SATGPA)>...
- Q Test whether the proportion of iphone owners is more than theproportion of android owners. Take two samples of at least 20 each.In the first sample ask "Do you own an...
- Q As a criminologist, you are interested in the factors related tojuvenile offending. You think that time spent studying influencesdelinquent behavior. In a group of 21 high school students, youcollect information...
- Q A NAPA auto parts supplier wants information about how long carowners plan to keep their cars. a simple random sample of 31 carowners results in a mean of 7.01 years...
- Q As per the author, Hirschey, how are the following methods usedto effectively answer the question, What do customers want?:consumer Interviews, surveys, market experiments and regressionanalysis.
- Q Consider the following hypothesis test.H0: ? ? 12Ha: ? > 12A sample of 25 provided a sample meanx = 14and a sample standard deviations = 4.37.(a)Compute the value of the...
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