Basic Math question and answers for August 19, 2023
- Q A random sample of 160 car purchases are selected andcategorized by age. The results are listed below. The agedistribution of drivers for the given categories is 18% for theunder 26...
- 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 A new kind of typhoid shot is being developed by a medicalresearch team. The old typhoid shot was known to protect thepopulation for a mean time of 36 months, with...
- Q Explain what it means conceptually when we find that acorrelation — or any other statistic that is testing a hypothesis —is significant. Refer to type I error, alpha, and confidencelevel.
- Q An experiment was run to examine the amount of time it takes toboil a given amount of water on the four different burners of herstove, and with 0, 2, 4,...
- Q The following table shows the Myers-Briggs personalitypreferences for a random sample of 406 people in the listedprofessions. E refers to extroverted and I refers tointroverted.Personality TypeOccupationEIRowTotalClergy (all denominations)6740107M.D.7389162Lawyer5582137ColumnTotal195211406Use the chi-square...
- Q The diameters of aluminum alloy rods produced on an extrusionmachine are known to have a standard deviation of 0.0001 in. Arandom sample of 25 rods has an average diameter of...
- Q he following data are for calculator sales in units at anelectronics store over the past nine​ weeks:                                                                            WeekSalesWeekSales144446575724545765653464685555451519646455757Use trend projection with regression to forecast sales forweeks10minus−13.What are the error measures​ (CFE,...
- Q Define each of the following terms anddescribe how the healthcare administrator useseach of them in quantitative analysis:a.   Estimationb.   Samplingc.   Organizing datad.   Presenting datae.   Interpreting results
- Q Let x be a random variable that represents the weightsin kilograms (kg) of healthy adult female deer (does) in Decemberin a national park. Then x has a distribution that isapproximately...
- Q The personnel department of a large corporation wants toestimate the family dental expenses of its employees to determinethe feasibility of providing a dental insurance plan. A randomsample of 12 employees...
- Q The table below lists a random sample of 53 speeding tickets onI-25 in Colorado.0-10 mphover limit10-20 mphover limitMore than20 mph over limitTotalMale8151336Female59317Total13241653(Note: PLease enter your answer as a decimal number...
- Q 1. Give a 95% confidence interval, for μ1−μ2μ1-μ2 given thefollowing information.n1=30, ¯x1=2.94, s1=0.34n2=45, ¯x2=2.71, s2=0.53_____±______ Use Technology Rounded to 2 decimal places.2. You wish to test the following claim (HaHa)...
- Q In correlation analysis, the independent variable isMultiple Choicethe variable that is scaled on the vertical axis.the variable that is being predicted or estimated.a variable that provides the basis for estimation....
- Q After getting trounced by your little brother in a children’sgame, you suspect the die he gave you to roll may be unfair. Tocheck, you roll it 60 times, recording the...
- Q For the 2 × 2 game, find the optimal strategy for each player.Be sure to check for saddle points before using the formulas.3 −3 2 3For row player R:r1 =r2...
- Q H0: u >= 20Ha: u< 20A sample of 50 provided a sample mean of 19.6. The populationstandard deviation is 1.4.a. Compute the value of the test statistic (to 2 decimals).b....
- Q according to a 2009 Reader's Digest article, people throw awayapproximately 16% of what they buy at the grocery store. Assumethis is the true proportion and you plan to randomly survey...
- Q Distance3.41.84.62.33.15.50.73.0Damage26.217.831.323.127.536.014.122.3Distance2.64.32.11.16.14.83.8Damage19.631.324.017.343.236.426.1Write the equation (formula) for aresidual and then calculate its value “by handâ€for the observation in the data set whose distance between the fireand nearest fire station (in miles) is...
- Q You are at a wetland site. You have been instructed to test forchromium contamination. Suppose that a regulatory agency hasdetermined that a population mean chromium concentration equal to 7mg/kg characterizes...
- Q Distance3.41.84.62.33.15.50.73.0Damage26.217.831.323.127.536.014.122.3Distance2.64.32.11.16.14.83.8Damage19.631.324.017.343.236.426.1Does the y-intercept for this regression model have practicalmeaning in this context? If so, interpret it. Otherwise, explainwhy not. Recall, the value of the explanatory variable is 0 for they-intercept....
- Q Find the power for a difference in means of 2.79 using 95% and99% confidence intervals.[11.540 8.203 8.214 13.165 11.451 13.015 11.060 10.488 8.8498.271][4.708 8.013 9.886 7.026 6.051 5.546 7.914 9.951...
- Q Dorothy purchases a 1000 par value 10-year bond with 9%semiannual coupons for 925. She has found a place to invest hercoupons at a nominal rate of 7% convertible semiannually. Calculateher...
- Q A 30-year annuity has end-of-month payments. The first year thepayments are $120 each. In subsequent years the monthly paymentincreases by $5 over what it was the previous year.Find the accumulated...
- Q The data below are yields for two different types of corn seedthat were used on adjacent plots of land. Assume that the data aresimple random samples and that the differences...
- Q . A lower proportion of males ages 25 to 44 visitedthe gym than the proportion of males ages 45 to 64. The table belowprovides the numbers by age group. Test...
- Q 1. A university asked 10 graduate students how many hours ofhomework they were planning to do that week. Here are theirresponses:14 13 15 21 19 24 25 28 25 31A....
- Q 6. For accreditation purposes, we are concernedabout the general knowledge of UIW students about American Economy.An exam was completed by 5 freshman students per area of degreechoice in a total...
- Q The wedding date for a couple is quickly approaching, and thewedding planner must provide the caterer an estimate of how manypeople will attend the reception so that the appropriate quantityof...
- Q PART 1Two methods are compared to inoculate or infect a corn fungusstrain known as huitlacoche. In a first stage of the study, theexperimenter wants to determine which of the methods...
- Q Testing: H 0 : μ = 67.9 H 1 : μ > 67.9 Your sample consistsof 24 subjects with ¯ x = 83.7 giving the resulting test statisticof 1.625 ....
- Q Office Equipment, Inc.(OEI) leases automatic mailing machines to business customers inFort Wayne, Indiana. The company built its success on a reputationof providing timely maintenance and repair service. Each OEIservice contract...
- Q Physician burnout is a serious problem and you have theimpression that morale among the physicians at your facility is ata low point. You administer a survey to get some quantitative...
- Q Problem 15-9(Algorithmic)Marty's Barber Shophas one barber. Customers have an arrival rate of 2.1 customers perhour, and haircuts are given with a service rate of 4 per hour. Usethe Poisson arrivals...
- Q How much does a sleeping bag cost? Let's say you want a sleepingbag that should keep you warm in temperatures from 20°F to 45°F. Arandom sample of prices ($) for...
- Q 9. As part of a study of corporate employees, the director ofhuman resources for PNC Inc. wants to compare the distance traveledto work by employees at its office in downtown...
- Q Consider the following data for a dependent variable yand two independent variables, x1andx2.x 1x 2y291394471010924171135016178406955220176757171371311859141427717211Round your all answers to two decimal places. Enter negativevalues as negative numbers, if necessary.a. Develop...
- Q A college dean is interested in the exam performance of studentsin a biology course. After the final exam, students are randomlyselected from three different section of the biology course. Whatcan...
- Q Why is it popular for advertisements to always state aconfidence interval? Give an example of where you have seenthis.
- Q A personnel director in a particular state claims that the meanannual income is greater in one of the​ state's counties​ (countyA) than it is in another county​ (county B). In...
- Q Consider the following price data from 2002 to 2010Year200220032004200520062007200820092010Price3.343.563.614.064.254.374.684.594.81a. Compute the simple price index using 2002 asthe base year. (Round your answers to 2 decimalplaces.)YearPrice index200220032004200520062007200820092010b. Update the index numbers...
- Q A sociologist claims that sleeping time of children ages 12-14in 1981 is different from that of children ages 12-14 today. Astudy was conducted in 1981 to find the time that...
- Q If you draw a card with a value of three or less from a standarddeck of cards, I will pay you $47. If not, you pay me $12. (Acesare considered...
- Q The following data shows the hours worked by employees at aMcDonalds and the number of dollars that they earned that day.Hours worked Pay dollars 8 68 7 59.5 8 68...
- Q An online site presented this​ question, \"Would the recentnorovirus outbreak deter you from taking a​ cruise?\" Among the34 comma 303people who​ responded,69​%answered​ \"yes.\" Use the sample data to construct a90​%confidence...
- Q A group of clinicians who are members of the U.S. military areconcerned with the morale of troops serving in war regions. Theyhypothesize that the number of tours a soldier serves...
- Q La Cabaña, a popular motel chain in the southwest, is interestedin developing a regression model that can predict the occupancyrate % of its motels. Currently, the company is interested in...
- Q The age distribution of the Canadian population and the agedistribution of a random sample of 455 residents in the Indiancommunity of a village are shown below.Age (years)Percent of Canadian PopulationObserved...
- Q Public Utility CompanyRate (5 CCF)Orlando Utilities Commission$10.48Memphis Light, Gas and Water$9.18Central Arkansas Water$11.80City of Phoenix Water System$6.50City of Lincoln Water System$12.42San Antonio Water System$14.53Salt Lake City Public Utilities$15.56Nashville Metro Water...
- Q Suppose we have the process (time series)xt = 0.5wt-1 + wt;where wt is white noise with mean zero and variance sigma squaredw.Find the mean, variance, autocovariance, and ACF of xt.
- Q An existing inventory for a test measuring self-esteem indicatesthat the scores have a standard deviation of10. A psychologist gave the self-esteem test to a random sampleof100individuals, and their mean score...
- Q A fair coin is flipped until a head appears. Let the number offlips required be denoted N (the head appears on the ,\1th flip).Assu1ne the flips are independent. Let the...
- Q A quality characteristic of interest for a tea-bag fillingprocess is the weight of the tea in the individual bags. In thisexample, the label weight on the package indicates that the...
- Q A population has a mean of 800 and a standard deviation of 200.Suppose a sample of size 400 is selected and x is used to estimateμ. (Round your answers to...
- Q Describe a correlation analysis, and provide an example of one.Provide examples of dependent and independent variables, aswell.
- Q Use engine size to predict the car’s width. Answer thequestions.I) For each additional 3.0 liter in engine size how muchthe car’s width will change? (11.11 points)a. It will increase by...
- Q a.  Suppose that 5 % of the items produced by afactory are defective. If 5 items are chosen at random, what is theprobability that none of the items are defective?...
- Q The mean time between arrivals of customers in a bank is 3minutes. Write the expression for the exponential distribution foraverage time between arrivals for any time t (t>=0). If acustomer...
- Q 7. A box contains 12 white marbles and 5 black marbles. Supposewe randomly draw a marble from the box, replace it, and thenrandomly draw another marble from the box. (This...
- Q An employee at a coffee shop hypothesizes that the harder theespresso grounds are tamped down into the portafilter before​brewing, the longer the separation time of the​ heart, body, andcrema will...
- Q When survey data indicated that a company needed to improve its​package-sealing process, an experiment was conducted to determinethe factors in the​ bag-sealing equipment that might be affectingthe ease of opening...
- Q Suppose a flop is said to \"have a flush draw possibility\" if itcontains exactly two cards of the same suit, plus another card of adifferent suit. For instance, A♥ K♥...
- Q A consumer preference study compares the effects of threedifferent bottle designs (A, B, and C)on sales of a popular fabric softener. A completely randomizeddesign is employed. Specifically, 15 supermarkets of...
- Q Please respond to the short answer items using the belowdataset. For any values with long decimals, please round to twodecimal places.X Y7Â Â Â 165 26 13 24Â Â Â 9What is the value...
- Q You want to obtain a sample to estimate a population mean. Basedon previous evidence, you believe the population standard deviationis approximately σ=58.2σ=58.2. You would like to be 95% confidentthat your...
- Q You wish to test the following claim ( H a ) at a significancelevel of α = 0.01 . H o : μ 1 = μ 2 H a :...
- Q You are conducting a test of the claim that the row variable andthe column variable are dependent in the following contingencytable.XYZA283845B283925Give all answers rounded to 3 places after the decimalpoint,...
- Q You may need to use the appropriate appendix table or technologyto answer this question.The increasing annual cost (including tuition, room, board,books, and fees) to attend college has been widely discussed(Time.com)....
- Q You may need to use the appropriate technology to answer thisquestion.A survey collected data on annual credit card charges in sevendifferent categories of expenditures: transportation, groceries,dining out, household expenses, home...
- Q Consider the following hypothesis test.H0:μd ≤ 0Ha:μd > 0(a)The following data are from matched samples taken from twopopulations. Compute the difference value for each element. (UsePopulation 1 − Population 2.)ElementPopulationDifference121212022828318184201852624(b)Computed.(c)Compute...
- Q Teenagers make up a large percentage of the market for clothing.Below are data on running shoe ownership in four world regions(excluding China). At α = .01, does this sample show...
- Q The recent default rate on all student loans is 6.2 percent. Ina recent random sample of 314 loans at private universities, therewere 8 defaults.Does this sample show sufficient evidence that...
- Q We assume that our wages will increase as we gain experience andbecome more valuable to our employers. Wages also increase becauseof inflation. By examining a sample of employees at a...
- Q In a recent NY Times Editorial, Ross Douthat looks at the workof Sen and discusses how the \"100 million missing women\" has nowincreased to \"160 million.\" He laments that the...
- Q In a recent year, the Better Business Bureau settled 75% ofcomplaints they received. (Source: USA Today, March 2, 2009) Youhave been hired by the Bureau to investigate complaints this yearinvolving...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!