Basic Math question and answers for September 03, 2023
- Q The table shows the results of a survey in which 142 men and 145woman workers age 25 to 64 were asked if they have at least onemonths income set aside...
- Q The number of goods sold by “The Local†is in excess of onemillion per year with deliveries being about 40% of that figure.The amount of goods sold has decreased marginally...
- Q The types of browse favored by deer are shown in the followingtable. Using binoculars, volunteers observed the feeding habits ofa random sample of 320 deer.Type of BrowsePlant Compositionin Study AreaObserved...
- Q A device is used in many kinds of systems. Assume that allsystems have either 1, 2, 3, or 4 of these devices and that each ofthese four possibilties is equally...
- Q Problem 6.1. If X N(9; 4), nd Pr(jX ? 2j < 4).2. If X N(0; 1), nd Pr(jX + 3j > 5).3. If X N(?2; 9), nd the number c...
- Q ​It's tough to find out how much people​ earn, but in​ 2011, amagazine reported that the average​ lawyer's salary in a countrywas $64,000. Suppose that today you interview a random...
- Q Let x be a random variable that represents the percentageof successful free throws a professional basketball player makes ina season. Let y be a random variable that represents thepercentage of...
- Q Suppose a 90% confidence interval for the mean salary of collegegraduates in a town in Mississippi is given by [$45,783, $57,017].The population standard deviation used for the analysis is known...
- Q 1)Â Â Â 75% of adultsmokers started smoking before turning 18 years in a population. Arandom sample of 30 smokers 18 years or older are selected and thenumber of smokers who started...
- Q A researcher obtained the ordinary least squares (OLS) estimatesfor a Ghanaian firm's stock price using 120 observations from 1980ml to 1989 m 12 (All variables in logarithms) as:In St =...
- Q The Ablex political party claims that more than 50% ofBloornians prefer their party to the Xyblex party. Perform ahypothesis test to the test the claim with alfa= 0.05 using asample...
- Q 40 numbers are rounded off to the nearest integer and thensummed. If the individual round-off error are uniformly distributedover (−.5,.5) what is the probability that the resultant sumdiffers from the...
- Q The distribution of durations for which apartmentsremain empty after the resident moves out for one propertymanagement company over the past 10 years was approximatley normalwith mean of 95 days and...
- Q 2A Human Relations managerbelieves that an individual's wage rate at the factory depends onthe individual performance rating and the number of trainingcourses the employee successfully completed in the trainingprogram. The...
- Q Why can't correlations tell us anything about causeand effect? Going further, what kind of an experimentaldesign would you need to explain cause and effect? Provide anexample to illustrate your point.
- Q This is a two part question:a) How will the company benefit from implementing Design forReliability (DFR)program? Names four of such benefits.b) What are some of the critical inputs to Design...
- Q Topic: “Is there a different between teacher’s and parents’perceptions of what constitutes effective school-to-homecommunication?â€Ho: this is the currently accepted statement that there is nosignificant difference between teachers and parents’ perceptions...
- Q You are a nursing researcher and you are interested in whetheruniversity grades are predictive of performance on the NCLEX exam.You randomly select a sample of 25 nurses from the Ontario...
- Q We have three light bulbs with lifetimes T1,T2,T3 distributedaccording to Exponential(λ1), Exponential(λ2), Exponential(λ3). Inother word, for example bulb #1 will break at a random time T1,where the distribution of this...
- Q Q 1 . ( 8 marks) Answer the following:a) Describe the difference between a discrete and a continuousra ndom variable. Give an example of each.b) Under what conditions might you...
- Q Book :Business Analytics 6th edition (data analysisand decision making)By s. Chirstian albright and wayne. L . wAIf your company makes a particular decision in the face ofuncertainty, you estimate that...
- Q The Wall Street Journal’s Shareholder Scoreboard tracks theperformance of 1000 major U.S. companies. The performance of eachcompany is rated based on the annual total return, including stockprice changes and the...
- Q Age (X)Time (Y)34Â Â Â Â Â Â Â Â Â Â 123,556.0017Â Â Â Â Â Â Â Â Â Â Â Â 92,425.0042Â Â Â Â Â Â Â Â Â Â 250,908.0035Â Â Â Â Â Â Â Â Â Â 204,540.0019Â Â Â Â Â Â Â Â Â Â Â Â 77,897.0043Â Â Â Â Â Â Â Â Â Â 197,012.0051Â Â Â Â Â Â Â Â Â Â 195,126.0050Â Â Â Â Â Â Â Â Â Â 177,100.0022Â Â Â Â Â Â Â Â Â Â Â Â 83,230.0058Â Â Â Â Â Â Â Â Â Â 140,012.0048Â Â Â Â Â Â Â Â Â Â 265,296.0035Â Â Â Â Â Â Â Â Â Â 189,420.0039Â Â Â Â Â Â Â Â Â Â 235,872.0039Â Â Â Â Â Â Â Â Â Â 230,724.0059Â Â Â Â Â Â Â Â Â Â 238,655.0040Â Â Â Â Â Â Â Â Â Â 138,560.0060Â Â Â Â Â Â Â Â Â Â 259,680.0022Â Â Â Â Â Â Â Â Â Â Â Â 93,208.0033Â Â Â Â Â Â Â Â Â Â Â Â 91,212.0036Â Â Â Â Â Â Â Â Â Â 153,216.0028Â Â Â Â Â Â Â Â Â Â Â Â 77,308.0022Â Â Â Â Â Â Â Â Â Â Â Â 56,496.0028Â Â Â Â Â Â Â Â Â Â 106,652.0044Â Â Â Â Â Â Â Â Â Â 242,748.0054Â Â Â Â Â Â Â Â Â Â 195,858.0030Â Â Â Â Â Â Â Â Â Â 178,560.0028Â Â Â Â Â Â Â Â Â Â 190,876.0016Â Â Â Â Â Â Â Â Â Â Â Â 98,528.0052Â Â Â Â Â Â Â Â Â Â 169,572.0022Â Â Â Â Â Â Â Â Â Â Â Â 79,420.0028Â Â Â Â Â Â Â Â Â Â 167,928.0035Â Â Â Â Â Â Â Â Â Â 215,705.0050Â Â Â Â Â Â Â Â Â Â 146,350.003. The strength of the correlation motivates furtherexamination.a. Insert Scatter (X,Y) plot linked to the data on this s heetwith Age on the horizontal (X) axis.b. Add to...
- Q Rothamsted Experimental Station (England) has studied wheatproduction since 1852. Each year, many small plots of equal sizebut different soil/fertilizer conditions are planted with wheat. Atthe end of the growing season,...
- Q Let x be a random variable that represents the level of glucosein the blood (milligrams per deciliter of blood) after a 12 hourfast. Assume that for people under 50 years...
- Q A survey of 300 U.S. online shoppers was conducted. In responseto the question of what would influence the shopper to spend moremoney online in 2012, 18% said free shipping, 13%...
- Q The following data represents a random sample of birth weignts(in kgs) of male babies born to mothers on a special vitaminsupplement.3.733.024.374.093.732.474.334.133.394.473.683.224.683.43(a) Do the data follow a normal distribution?  ? YesNoReport the...
- Q An important application of regression analysis in accounting isin the estimation of cost. By collecting data on volume and costand using the least squares method to develop an estimatedregression equation...
- Q An automotive parts supplier assesses the usability and qualityof the door locks that they provide. The locks are manufactured atthree different plants. The production manager wants to determinewhether the plant...
- Q The table t-value associated with 8 degrees of freedom and usedto calculate a 99% confidence interval is _______.Select one:a. 3.355b. 1.860c. 1.397d. 2.896Cameron Sinclair, Information Services Manager with GlobalFinancial Service...
- Q In an effort to promote a new product, a marketing firm asksparticipants to rate the effectiveness of ads that varied by length(short, long) and by type of technology (static, dynamic,interactive)....
- Q Mean number of desks produced per week is 42 and populationstandard deviation is 4.67. the company has introduced newproduction methods. A random sample of 12 weeks productionindicates 44 desks were...
- Q Explain Monte Carlo Sampling? Under what circumstances, can itbe used? Elaborate on the application and limitations related tothis sampling?
- Q Health-Care Survey. In the spring of 2017, the Consumer ReportsNational Research Center conducted a survey of 1007 adults to learnabout their major health-care con-cerns. The survey results showedthat 574 of...
- Q 2. Blood pressure is independent of the blood group. We want toknow, if the distributions attending to the blood group, in threereferred samples attending to the type of blood pressure,...
- Q This is a written, statistical report, not simply a collectionof different types of Excel output. It is not necessary to includethe formulas you used or a copy of the dataset....
- Q Using plots and descriptive statistics is too simple for makingany marketing decisions (T or F)Median should always be preferred over mean because it is lesssensitive to outliers (T or F)If...
- Q Let X and Y be uniform random variables on [0, 1]. If X and Yare independent, find the probability distribution function of X +Y
- Q A coworker claims that Skittles candy contains equal quantitiesof each color (purple, green, orange, yellow, and red). In otherwords, 1/5 of all Skittles are purple, 1/5 of all Skittles aregreen,...
- Q The bloodhound is the mascot of John Jay College. Suppose weweigh n=8 randomly selected bloodhounds and get the followingweights in pounds85.6, 91.6, 105.9, 83.1, 102.1, 92.5, 108.8, 81.4Assume bloodhound weight...
- Q The U-Plant’um Nursery must determine if there is a differencein the growth rate of saplings that have been treated with fourdifferent chemical formulas. The resulting growth rates over agiven period...
- Q 4. In a survey sponsored by the Lindt chocolate company, 1708women were surveyed and 85% of them said that chocolate made themhappier. (a) Is there anything potentially wrong with this...
- Q Given the question:\"Researchers found that 25% of the beech trees in east centralEurope had been damaged by fungi. Consider a sample of 20 beechtrees from this area.How many of the...
- Q A 99% CI on the difference between means will be (longerthan/wider than/the same length as/shorter than/narrower than )a95% CI on the difference between means.In semiconductor manufacturing, wet chemical etching is...
- Q CustomerType ofCustomerItemsNet SalesMethod ofPaymentGenderMaritalStatusAge1Regular149.5DiscoverMaleMarried222Promotional1112.4Proprietary CardFemaleMarried263Regular132.5Proprietary CardFemaleMarried224Promotional5110.4Proprietary CardFemaleMarried185Regular264MasterCardFemaleMarried246Regular154.5MasterCardFemaleMarried347Promotional288Proprietary CardFemaleMarried208Regular132.5VisaFemaleMarried309Promotional266.52Proprietary CardFemaleMarried3610Regular154.5Proprietary CardFemaleMarried2611Regular139.5Proprietary CardFemaleMarried3812Promotional141.6Proprietary CardFemaleMarried3013Promotional9170.4VisaFemaleMarried3014Promotional274.5VisaFemaleMarried3615Regular159.5VisaMaleSingle4416Promotional281.4Proprietary CardMaleSingle2617Promotional3104Proprietary CardFemaleSingle3218Regular364.5DiscoverFemaleMarried3019Promotional248.5MasterCardFemaleMarried2220Promotional654.8Proprietary CardFemaleMarried4621Promotional141.6Proprietary CardFemaleSingle1822Promotional480.82Proprietary CardFemaleMarried2823Promotional7276American ExpressFemaleMarried4024Regular284Proprietary CardFemaleMarried3225Promotional249.5VisaMaleMarried3826Promotional140.02Proprietary CardFemaleMarried5027Regular154.5Proprietary CardFemaleMarried4428Promotional5202.8Proprietary CardFemaleSingle3229Promotional381.2Proprietary CardFemaleMarried2230Promotional128Proprietary CardFemaleMarried6031Promotional273.2MasterCardFemaleMarried1832Regular185Proprietary CardFemaleMarried4233Promotional373.2Proprietary CardFemaleMarried3434Regular150Proprietary CardFemaleMarried2435Promotional5115.5MasterCardFemaleMarried4636Regular139.5MasterCardMaleSingle2637Regular2112.5VisaFemaleSingle3238Promotional6127.5Proprietary CardFemaleMarried4039Promotional523.23Proprietary CardFemaleMarried3440Regular262.5Proprietary CardFemaleMarried4841Promotional13208.8Proprietary...
- Q A. Here is a bivariate data set.xy25.752.529.464.721.854.93563.431.474.721.646.540.869.737.977.716.741.129.678.113.145.536.178.432.168.245.276.836.157.9Find the correlation coefficient and report it accurate to threedecimal places.r =What proportion of the variation in y can be explained bythe variation in...
- Q The following table shows the length of stay distribution forguests staying at a beach resort, in days. The resort managementmakes a net profit of $250 per day per guest during...
- Q Consider the following experiment: we roll a fair die twice. Thetwo rolls are independent events. Let’s call M the number of dotsin the first roll and N the number of...
- Q A claim with an alpha =0.10 and a mu of 20. A sample size of 30yields a sample mean of 17.5 and a sample standard deviation of 10.What is the...
- Q Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately σ2 =5.1. Suppose...
- Q Question 4:The times that a cashier spends processing each person’stransaction are independent and identically distributed randomvariables with a mean of µ and a variance of σ2 . Thus,if Xi is...
- Q 6. Digital streaming has shifted some of the focus fromtraditional TV commercials to online advertisements.The Harris poll reported in 2012 that 53% of 2,343 American adultssurveyed said they watched digitallystreamed...
- Q A survey of 1935 people who took trips revealed that 181 of themincluded a visit to a theme park. Based on those survey results, amanagement consultant claims that less than...
- Q Construct an 80​% confidence interval to estimate the populationmean when x overbar=131 and s​ = 28 for the sample sizes below.​a) n=20​b) n=50 ​c) n=80
- Q Hemoglobin (g/100mL) was measured twice in 20 pregnant women. Afirst measurement was taken at 1-3 weeks prepartum whereas thesecond measurement was taken at 2-6 days postpartum (the data isprovided below).Part...
- Q 7. A data set includes 108 body temperatures of healthy adulthumans having a mean of 98.3 F° and a standard deviation of 0.69F°. Construct a 99​% confidence interval estimate of...
- Q Use the â€test.vs.grade†data and test the null hypothesis thatthe mean test score for the population is 70 against thealternative that it is greater than 70. Find a p-value and...
- Q Customers enter the camera department of a store at an averagerate of five per hour. The department is staffed by one employee,who takes an average of 8.0 minutes to serve...
- Q 2. A standard 52-card deck consists of 4 suits (hearts,diamonds, clubs, and spades). Each suit has 13 cards: 10 are pipcards (numbered 1, or ace, 2 through 10) and 3...
- Q Mr. Jones’ ninth grade class is studying the influence oftemperature on respiration rate in goldfish. Each of his 24students has a single goldfish isolated in a goldfish bowl halffull of...
- Q A person’s educational attainment and age group was collected bythe U.S. Census Bureau in 1984 to see if age group and educationalattainment are related. The counts in thousands are in...
- Q Two dice are tossed one after the other. What is the conditionalprobability that the first die is six, given that the sum of thedice is seven?
- Q You took independent random samples of 20 students at CityCollege and 25 students at SF State. You asked each student howmany sodas they drank over the course of a year....
- Q The customer expectation when phoning a customer service line isthat the average amount of time from completion of dialing untilthey hear the message indicating the time in queue is equal...
- Q Use Excel to test. For each paired difference, compute After –Before. In Data Analysis, t-Test: Paired Two Sample for means,select the After data for Variable 1 Range. Note that the...
- Q A poll surveyed people in six countries to assess attitudestoward a variety of alternate forms of energy. Suppose the data inthe following table are a portion of the poll's findings...
- Q DataMonthChevy CruzeFord FocusHyundai ElantraHonda CivicToyota CorollaVW JettaJanuary21,71121,30321,00619,34120,98519,671February18,27419,38519,99220,87219,78519,105March17,93416,55715,71317,18116,88916,006April19,38717,42015,05414,50014,09314,083May17,09716,14715,02315,80015,72716,875June16,24416,17314,29515,05815,23616,893Phase 1 report must include the preliminary findings:What are the means, medians, modes, range and standarddeviation for each of the six car models? Draw...
- Q Perform t-test on eRPM for strategy A and B. H0: A = B vs. H1: A!= B (Two-sided t-test) What is the p-value?StrategyDateeRPMA15-Jun-143.47A16-Jun-143.25A17-Jun-143.32A18-Jun-143.46A19-Jun-143.58A20-Jun-143.48A21-Jun-143.48A22-Jun-143.46A23-Jun-143.34A24-Jun-143.33A25-Jun-143.37A26-Jun-143.53A27-Jun-143.67A28-Jun-143.83A29-Jun-143.78A30-Jun-143.48B15-Jun-143.34B16-Jun-143.3B17-Jun-143.33B18-Jun-143.6B19-Jun-143.85B20-Jun-143.89B21-Jun-143.69B22-Jun-143.64B23-Jun-143.6B24-Jun-143.42B25-Jun-143.41B26-Jun-143.72B27-Jun-143.94B28-Jun-144.07B29-Jun-144.05B30-Jun-143.69
- Q Consider the following data set.x123456y3.000.210.610.701.131.17a) plot the data (y versus x). Are there any points that appearto be outliers? If there are, circle them and label as such.b) produce a...
- Q Real Fruit Juice: A 32 ounce can of a popular fruit drink claimsto contain 20% real fruit juice. Since this is a 32 ounce can, theyare actually claiming that the...
- Q 1. An instructor would like to examine the effect of usinghandouts during lecture on student’s grades. Usually no handoutsare used and the mean final grade in the class is μ...
- Q Suppose the National Transportation Safety Board (NTSB) wants toexamine the safety of compact cars, midsize cars, and full-sizecars. It collects a sample of cars each of the cars types. The...
- Q What's the different between bayes's theorem and conditionaltheorem ?
- Q In 2009, the Southeastern Conference (SEC) commissioner set agoal to have greater than 65% of athletes that are enteringfreshmen graduate in 6 years. In 2015, a sample of 100 enteringfreshmen...
- Q Let a random sample of 100 homes sold yields a sample mean saleprice of $100,000 and a sample standard deviation of $5,000. Find a99% confidence interval for the average sale...
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