Basic Math question and answers for July 23, 2023
- Q A bakery opens every day from Monday to Saturday, but only inthe morningon Wednesdays. It is known that the number of bread rolls solddaily followsa Gaussian distribution with mean 130...
- Q The publisher of a sports magazine plans to offer newsubscribers one of three gifts: a sweatshirt with the logo of theirfavorite team, a coffee cup with the logo of their...
- Q There is a strong linkage between statistical data analysis anddata mining. Some people think of data mining as automated andscalable methods for statistical data analysis. Do you agree ordisagree with...
- Q The evidence supporting obesity as a risk factor for coloncancer remains inconclusive, especially among women. A studyreported the association between obesity (measured at baseline) andcolon cancer morbidity as determined from...
- Q To try to determine whether the composition of the earth’satmosphere has changed over time, scientists can examine the gas inbubbles trapped inside ancient amber. (That’s the plotof Jurassic Park.) Assume that...
- Q Read the passage provided, and then consider the followingscenario. A physician is trying to decide whether to prescribemedication for cholesterol reduction in a 45-year-old femalepatient. The null hypothesis is that...
- Q Please as soon as possibleTopic: How do CO2 emissions vary globally?Two specific questions:• Do countries with higher CO2 emissions also have largeagricultural sectors?• Do CO2 emissions vary by geographicregion?This is...
- Q You’re a researcher looking at whether or not applicants areaccepted to a prestigious law internship. Only 10% of applicantsreceive a call to a first interview. You’re interested in twosamples: all...
- Q Define data processing and explain the steps to be followed fordata processing
- Q Abstract 2. Mann JR and McDermott S. Arematernal genitourinary infection and pre-eclampsia associated withADHD in school-aged children? J Atten Disord2011;15(8):667-73.OBJECTIVE: To investigate the hypothesis thatmaternal genitourinary infection (GU) infection is...
- Q One possible explanation for why some birds migrate and othersmaintain year-round residency in a single location is intelligence.Specifically, birds with small brains, relative to their body size,are simply not smart...
- Q The following sample observations were randomly selected. x: 6,5, 4, 6, 10 y: 4, 6, 5, 2, 11. Determine the 0.95 confidenceinterval for the mean predicted when x=9. Determine the...
- Q A colleague of yours is completing afinal report on the causes of the frequency ofcyberbullying. In this report, she is asked to identifythe causes that most strongly impacted the frequency ofcyberbullying. She...
- Q A television CEO believes viewership of the evening news doesnot depend on age. She collects a random sample of 2000 televisionviewers across four different age groups and asks whether or...
- Q It is known from past information that the probability offailing to finish an Ironman (called a DNF) is 15%. Suppose we takea sample of 100 Ironman races over the past...
- Q We are interested in looking at ticket prices of MLB games. Itis known from past information that the average price is $26.30,with a population standard deviation of $2.32. Suppose we...
- Q A group of college students want to have a party. They need todecide if they want to have it at the Beach (B) or at the Park (P)or in a...
- Q Cincinnati Paint Company sells quality brands of paints throughhardware stores throughout the United States. The company maintainsa large sales force who call on existing customers and look for newbusiness. The...
- Q Let x represent the dollar amount spent on supermarketimpulse buying in a 10-minute (unplanned) shopping interval. Basedon a certain article, the mean of the xdistribution isabout $26 and the estimated...
- Q A pet food company has a business objective of expanding itsproduct line beyond its current kidney- and shrimp-based cat foots.The company developed two new products, one based on chicken liverand...
- Q Grades and AM/PM Section of Stats: There weretwo large sections of statistics this term at State College, an8:00 (AM) section and a 1:30 (PM) section. The final grades forboth sections...
- Q Brand ways Company indicate on the label that their loaves weigh500g. A sample of 50 loaves is selected hourly from theirprocessing line and the contents weighed. Last hour a sample...
- Q How does data quality affect BusinessAnalytics?
- Q The number of wooden sailboats constructed per month in a smallshipyard is a random variable that obeys the probabilitydistribution given in Table below: Probability distribution ofmonthly Number of Sailboats /Probability(...
- Q Management of a soft-drink bottling company wants to develop amethod for allocating delivery costs to customers. Although onecost clearly relates to travel times within a particular route,another variable cost reflects...
- Q What are the two main advantages of factorial experiments?This question from statistics.
- Q Q2. Proportions (percentages) in a ZDistributionA large population of scores from a standardized test arenormally distributed with a population mean (?) of 50 and astandard deviation (?) of 5. Because...
- Q Hello!I am stuck on only B-1 Recession EPS - I got everything else andI cannot figure out what I'm doing wrong - I keep getting $4.81,but it's incorrect and I...
- Q Assume that you plan to use a significance level of alpha = 0.05to test the claim that p1 = p2. Use the given sample sizes andnumbers of successes to find...
- Q Find the best regression equation that gives selling price as afunction of living area, taxes, acreage and rooms.House Selling PriceProblemtaken from Triola. ElementaryStatistics. Addison-Wesley House Selling Price Living Area Taxes Acreage Rooms$1,000 100 sq. ft$1,0001145151.92522283833.6113150231.41.894130161.40.5375160161.50.576114131.80.3177142202.40.759826524427
- Q Write out a chart or explain in writing how you would conduct anexperiment on retroactive interference. Make sure to clearlyindicate what is given to both the control and experimental groups.(6...
- Q Use Excel to perform various analyses and generate graphs,charts and plots of the following activities: generate frequencytables; produce bar graphs, pie charts, line charts, and scatterplots; calculate mean, median, and...
- Q Problem # 9: Family income 2011 According to Statistics Canada,Income Statistics Division, the mean after-tax family income in2011 was $63000, while the median was $50700. In contrast to 2011dollars, the...
- Q The following table is used for a number of questions below. Thetable above shows the responses of a survey of teenagers aged 14-18when asked at what age they thought they...
- Q You roll two fair dice. Let A be the event that the sum of thedice is an even number. Let B be the event that the two results aredifferent.(a) Given...
- Q Computers Magazine has recently completed an analysis of itscustomer base. It has determined that 75% of the issues sold eachmonth are subscriptions and the other 25% are sold at newsstands.It...
- Q Directions: Solve the following problems, detailing anddocumenting the solutions. Additional instructions: For eachproblem, be sure to include the (a) type of parametric ornonparametric testing being performed; (b) both null and...
- Q What is the equipment variation as a percent of processvariation using ANOVAPart Appraiser Trial Measurement1 1 1 12.3691 1 2 11.9571 2 1 12.9151 2 2 13.0651 3 1 13.8941 3 ...
- Q PROBLEM:The average hourly wage of carpenters is normally distributedwith a population mean of $62.00 and a population standarddeviation of $8.00. Calculate the following:(a) The proportion of carpenters earning between $48...
- Q Regression analysis consists of two major tasks: (i) estimationof population parameters and (ii) hypothesis testing (e.g., t-test,F-test) or the application of inferential statistics to theestimated parameters. We learned OLS (ordinary...
- Q Make the following:a. frequency distributionb. pareto chartc. probability distributiond. pie graphfor the following set of numbers :Prophecy - 15 out of 50Advice - 7 out of 50Wisdom - 17 out...
- Q A growing concern of employers is time spent in activities likesurfing the Internet and e-mailing friends during work hours. TheSan Luis Obispo Tribune summarized the fundings from a survey of...
- Q Shown below is a portion of a computer output for a regressionanalysis relating Y (demand) and X (unit price). ANOVA df SSRegression 1 Error 3132.661 Total 47 8181.479 Coefficients StandardError...
- Q Consider the following data: 43 54 55 63 67 68 69 77 85 Supposethat the last value is actually 115 instead of 85. What effectwould this new maximum have on...
- Q The correct degrees of freedom for a dependent samples ttestwith 55 participants in each group would be equal to ________.
- Q A sports psychologist gave a questionnaire about healthy eatinghabits to randomly selected professional athletes. The results aredisplayed below. Using the .05 significance level, is there adifference in healthy eating habits...
- Q Each? year, ratings are compiled concerning the performance ofnew cars during the first 60 days of use. Suppose that the carshave been categorized according to whether a car needs?warranty-related repair?...
- Q Assume that the time needed to complete a midterm examfor a particular course is normally distributed with a mean of 90minutes and a standard deviation of 15 minutes.5- What percentage...
- Q According to a? survey, people in a certain country ate anaverage of 212 meals in restaurants in 2001. The data in theaccompanying table show the number of meals eaten in...
- Q A store surveys customers to see if they are satisfied with theservice they receive. Samples of 75 surveys are taken. One in sixpeople are unsatisfied. What is the variance of...
- Q DifferentiateStandard error of regression (Sy)Standard error of slope (Sm)Standard error of y-intercept (Sb)
- Q A company is willing to renew its advertising campaign with alocal radio station only if the station can demonstrate that thereis evidence that more than 20% of the residents of...
- Q Proportion at 77mm (%)Average RainfallHand Feeding6710017515008014807270191210069120155501771670842300921890584016993174133072801661081A farmer who specialises in the production of carpet wool wherethe sheep are shorn twice per year is seeking a 75-mm-length clipfrom his Tukidale sheep....
- Q Answer anyone questionQuestion 1: Fama and French (1993) have included aSize factor in their 3-factor model. Survey the most recentliterature and discuss whether the Size factor is still present infinancial markets...
- Q BIG Corporation advertises that its light bulbs have a meanlifetime, u , of 3000 hours. Suppose that we have reason to doubtthis claim and decide to do a statistical test...
- Q 1. What happens to the validity of the EOQ model of orderingwhen the reorder point (ROP) exceeds the maximum inventory levelduring each cycle of replenishment? Use suitable sketches tosupport your...
- Q A problem with a cell phone that prevents a customer fromreceiving calls is upsetting both customers and thetelecommunications company. The file Phone contains samples of 20problems reported to two different...
- Q The company has been making efforts to increase the skills ofits workers and they have been funding training programs foremployees. Five years ago, only 8% of the workforce hadC TRAINING...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.A random sample of 5060 permanent dwellings on an entirereservation showed that...
- Q Total plasma volume is important in determining the requiredplasma component in blood replacement therapy for a personundergoing surgery. Plasma volume is influenced by the overallhealth and physical activity of an...
- Q Ihonestly have a lot of questions regarding frequency tables,regression, standard deviation and so on questions. I’m not greatat math and these formulas are all very confusing. Is there asimpler way...
- Q Question:Discuss the reasons for using Bayesian analysis when faced withuncertainty inmaking decisions.Discussion Requirements:How would you describe Bayesian Theorem?Describe the assumptions of Bayesian analysis.Provide the example of problem where one can...
- Q A manufacturer of electric lamps is testing a new productionmethod that will be considered acceptable if the lamps produced bythis method result in a normal population with an average life...
- Q The following three independent random samples are obtained fromthree normally distributed populations with equal variance. Thedependent variable is starting hourly wage, and the groups are thetypes of position (internship, co-op,...
- Q According to Masterfoods, the company that manufacturesM&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12%are red, 23% are blue, 23% are orange and 15% are green. Yourandomly select...
- Q Instructions: Be sure to define all parameters and randomvariables used. Also, you must provide any code you use (finalcomputed values are not sufficient). I strongly recommend that youcreate Jupyter Notebooks...
- Q A researcher examining data on schools finds that thehigher the average income of the parents whose children attend aschool, the higher is the average achievement test score for allstudents in...
- Q Question 10.1 (1 point) Suppose that the distribution of incomein a certain tax bracket is approximately normal with a mean of$53,183.88 and a standard deviation of $1,799.608. Approximately18.56% of households...
- Q BrokerageSpeedSatisfactionScottrade, Inc.3.53.3Charles Schwab3.53.3Fidelity Brokerage Services3.83.2TD Ameritrade3.73.7E*Trade Financial3.03.2Vanguard Brokerage Services2.83.6USAA Brokerage Services3.53.7Thinkorswim2.62.6Wells Fargo Investments2.22.6Interactive Brokers4.04.0Zecco.com2.32.3Develop the least squares estimated regressionequation. (to 3 decimals)Suppose Wells Fargo Investments developed new software toincrease their...
- Q The average income of 16 families who reside in a large city is$54,356 and the standard deviation is $8256. The average income of12 families who reside in a suburb of...
- Q how can you use regression analysis to make a decision as acashier? Include a description of the decision, what would be theindependent and dependent variables, and how data could ideally...
- Q To determine the effectiveness of learning a cartwheel bywatching a video, a gymnastics teacher randomly divided 15 novicegymnasts into 3 groups of 5 students each. One group (control)viewed a live...
- Q An automotive manufacturer wants to know the proportion of newcar buyers who prefer foreign cars over domestic.Step 2 of 2:Suppose a sample of 1453 new car buyers is drawn. Of...
- Q A city has 10,000 households, and you have collected a simplerandom sample size of 25 from the households in this city andmeasured how much each household paid in school taxes...
- Q The scores for a certain test of intelligence are normallydistributed with mean 100 and standard deviation Find the 80thpercentile of these scores.Below is the table used, I still cant figure...
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