Basic Math question and answers for October 03, 2023
- Q Jerome is creating a secret passcode for his vault. The vaultuses some of the Greek alphabet –possible choices are (?, ?, ?, ?,?, ?, ?, ?, ?, ?, ?, ?},...
- Q How would you interpret a correlation coefficient of-0.95 between the two parameters; age of the patient and thetestosterone level? How would your interpretation change if thecoefficient was 0.03 or 0.48?
- Q The VA has collected the past month’s data from sixteenhospitals. The VA believed the selected hospitals were efficientlyrun. The objective is to derive a model based on the efficienthospitals to...
- Q Please provide solutions to the following problems. Please useExcel to solve the problems and submit theExcel spreadsheet.You started a new restaurant. Based on invoices forthe first 30 days, you estimated...
- Q Please solve the following questions. Please show all work andall steps.1a.) Find CDF of the Bernoulli Distribution.1b.) Explain your reasoning for part 1a above. Do not use aseries result.2a.) For...
- Q Suppose a geyser has a mean time between eruptions of 80minutes. If the interval of time between the eruptions is normallydistributed with standard deviation 26 minutes?, answer thefollowing questions. ?(a)...
- Q Write up a short paragraph in your own words,describing what Baye's Theorem is and how is it related toConditional Probability and the Multiplication Rule. Base on theresearch, determine what the...
- Q In your opinion, whichcalculation is more informative to a primary care physician in arural village—incidence rates or prevalence rates of HIV? Explainyour answer and provide an example to support your...
- Q What is a dummy variable? If we use one on theright-hand side of the equation in a multivariate analysis, whatare the implications for interpreting theconstant? What is multicollinearity?How do we know...
- Q Let X be a random variable representing the number of years ofeducation an individual has, and let Y be a random variablerepresenting an individual’s annual income. Suppose that the latestresearch...
- Q A television sports commentator wants to estimate the proportionof citizens who? "follow professional? football." Complete parts?(a) through? (c). ?(a) What sample size should be obtained if hewants to be within...
- Q Daily high temperatures in St. Louis for the last week were as?follows: 92?, 94?, 93?, 95?, 95?, 86?, 95 ?(yesterday).?a) The high temperature for today using a? 3-day moving average?=...
- Q 3. A recent study showed that the average number of sticks ofgum a person chews in a week is 15. A college student believes thatthe guys in his dormitory chew...
- Q In each of the following sets of variables, which are likelycandidates to be treated as independent and which as dependentwithin a research study?• Gender, alcohol consumption, and driving record In...
- Q Political polling relies heavily on sampling techniques, whichallow us to make inferences about an entire population based ononly a portion of the population. However, the "Brexit" referendumin the United Kingdom...
- Q The type of household for the U.S. population and for a randomsample of 411 households from a community in Montana are shownbelow.Type of HouseholdPercent of U.S.HouseholdsObserved Numberof Households inthe CommunityMarried...
- Q A technician compares repair costs for two types of microwaveovens (type I and type II). He believes that the repair cost fortype I ovens is greater than the repair cost...
- Q The administration of a local college states that the averageage of its students is 28 years. Records of a random sample of 100students give a mean age of 31 years....
- Q Imagine you take the SAT which has a µ = 500 and ? = 100 andreceive a score of X = 600. What proportion of people did betterthan you?(round to...
- Q A student asked 7 random people that graduated last year theirGPA and starting salary. The following table includes theresponses:GPAStarting Salary($ in thousands)12.05$ 3822.15$ 4032.53$ 4642.68$ 4353.12$ 5563.33$ 5573.65$ 621. What is the coefficient of correlation?a) -0.9857b) -0.5854c)...
- Q The methods of parametric statistics (like t-tests, z-intervals,etc.) can be applied to nominal or ordinal data. Question 1options: True or FalseQuestion 2 When only ordinal-level data are available,Spearman’s rank correlation...
- Q Describe four methods of sampling, and provide examples of each.How could each of these methods be useful in some area of business?Do you think any more method would be more...
- Q Problem 1A farm has been experimenting with a special diet for itshorses. The feed components for the diet area standard feed product, a vitamin-enriched oat product, and anew vitamin and...
- Q Suppose we suspect a coin is not fair — we suspect that it haslarger chance of getting tails than heads, so we want to conduct ahypothesis testing to investigate this...
- Q ******Show work, no Exel/Spss please!!!!******To answer this question, refer to the following hypotheticaldata collected using replicated measures design.Subject12345678910Pre50493716804240583121Post56503025904460713222a) In a two-tailed test of H 0 using ?=0.05, what is p(obtained)for...
- Q Par Inc. is a small manufacturer of golf equipment. It producestwo types of golf bags: Standard and Deluxe. Each bag type requiresthe following operations (and production times) to produce oneunit:Production...
- Q Jon Hoke owns a bicycle shop. He stocks three types of bicycles:road-racing, cross-countryand mountain. A road-racing bike costs $1,200, a cross-countrybike costs $1,700 and amountain bike costs $900. He sells...
- Q find z0.48
- Q Assume the following data represent the cost of a gallon ofgasoline ($) at all the various gas stations around town on a givenday. Take a random sample of size 5...
- Q Consider the following situation: Electrical engineers have adevice that tests for battery life (in minutes) by placing abattery under a controlled electrical load and measuring how longit lasts. They are...
- Q An advocacy group claims that Blacks/African-Americans areover-represented in the incarcerated population. In other words,they are claiming that there is a higher percentage ofBlacks/African-Americans in the incarcerated population than in thegeneral...
- Q In an annual report to investors, an investment firm claims thatthe share price of one of their bond funds had very littlevariability. The report shows the average price as $?20.00...
- Q A Gallup poll asked a random sample of 1000 adults nation-widethe following question:: "Are you in favor of the death penalty fora person convicted of murder?" 71% of the people...
- Q Components of a certain type are shipped to a supplier inbatches of ten. Suppose that 48% of all such batches contain nodefective components, 29% contain one defective component, and 23%contain...
- Q please answer thequestion using Excel with formula please explain how the answercame1.Many drugs used totreat cancer are expensive. BusinessWeek reported on the cost pertreatment of Herceptin, a drug used to...
- Q Problem 16-05 (Algorithmic)A major traffic problem in the Greater Cincinnati area involvestraffic attempting to cross the Ohio River from Cincinnati toKentucky using Interstate 75. Let us assume that the probability...
- Q Number of defective monitors manufactured in day shift andafternoon shift is to be compared. A sample of the production fromsix day shifts and eight afternoon shifts revealed the followingnumber of...
- Q Statistics and Graphical DisplaysValencia Orange Price ComparisonYou have been hired as a consultant to determine who ABC GroceryStore should be ordering Valencia Oranges from.To: StatisticianFrom: ABC Grocery StorePlease advise us...
- Q BackgroundThe 2016 US Presidential Election brought considerable attentionto the phenomenon of “fake news”: entirely fabricated and oftenpartisan content that is presented as factual. Researchersevaluated one mechanism that may contribute to...
- Q A study might compare the rates of microbiologic cure of threedifferent antibiotics used for urinary tract infection, as shown inthe following table:Antibiotics 1Antibiotics 2Antibiotics 3TotalCure4911226187Not cure1237857Total6114934244Are the variables quantitative or...
- Q A personnel director claims that the distribution of the reasonswithers leave their job is different from the distribution: 41%limited advancement; 25% lack of recognition; 15% lowsalary/benefits; unhappy with management 10%;...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.A random sample of 5260 permanent dwellings on an entirereservation showed that...
- Q A parabolic satellite dish reflects signals to the dish’s focalpoint. An antenna designer analyzed signals transmitted to asatellite dish and obtained the probability density functionf(x)=cæ1- 1 x2o?for0<x<2,whereXisthedistance(inmeters)fromthecentroidofthe c? 16÷e?ødish surface...
- Q The two data sets in the table below are dependent randomsamples. The population of (x?y)(x-y) differences is approximatelynormally distributed. A claim is made that the mean difference(x?y)(x-y) is greater than...
- Q A survey is conducted using 2000 registered voters who are askedto choose between candidate A and candidate B. Let p denote thefraction of voters in the population who prefer candidate...
- Q A corporation only recruits applications who attended one ofthree schools: College A, B and C. The director HR knows that 10%of the job applicants attended A, 30% attended B and...
- Q annual income for Americans in 2012. Use the data set to answerthe following questions: Hint: Use ExcelData setincome (in dollars)45000217501875037500100000120000275006750055000100000275001875067500120000550005500021750137505500020006750014000055000450008250013750237506750010000021750375004500045000825008250017500012000067500200045000187503250045001375055003250045000187501000001625013750217504500037500187506750027500825004500055000112503750027500237508250045000375005500067500120000Formulate the null and alternative hypotheses that can be usedto test...
- Q Anyone who has studied statistics or research has heard thesaying "Correlation does not imply causation." What factors must ananalyst consider to decide whether the correlation is meaningfulenough to investigate further?
- Q The following data are the ages (in years) at diagnosis for 20patients under treatment for meningitis: 18 18 25 19 23 20 69 18 211820 18 18 20 18 19...
- Q 1. It is believed that the population proportion of adults inthe US who own dogs is 0.65. I surveyed people leaving theveterinarians office and found that 96 out of 150...
- Q The following table represents the percentage of voters, by age,who favor increasing the minimum wage in a particular city.Ages 18 - 29 30 - 39 40 - 49 50 -...
- Q how does the logistic regression work to further the ability ofthe results
- Q (Binomial) The probability that a patient recovers from adelicate heart operation is 0.85. Of the next 7 patients, what isthe probability that(a) exactly 5 survive?(b) between 3 and 6 survive...
- Q How productive are U.S. workers? One way to answer this questionis to study annual profits per employee. A random sample ofcompanies in computers (I), aerospace (II), heavy equipment (III),and broadcasting...
- Q In the SPSS system exactly what is the variable measure forabany?
- Q A survey asked parents of children aged ten and under how manybirthday parties they attended last year. Let X represent thenumber of birthday parties. The probability distribution is givenbelow. Find...
- Q The data below are survival times (in years) for cancerpatients receiving experimental therapy (TREAT) or standard of care(SOC) in a time-to-mortality study.IDTherapyYearsEvent1TREAT1.612TREAT2.713TREAT4.914TREAT5.305TREAT6.216TREAT6.707TREAT7.118TREAT7.919SOC0.6110SOC1.4111SOC1.6112SOC3.5113SOC4.8114SOC5.7115SOC6.3116SOC7.30By hand, calculate the Kaplan-Meier estimate of the survivalfunction...
- Q QD Corporation makes paints known for their quality and quickdrying features. QD has developed a new wall paint code namedMickey that it is testing in a controlled environment. The firm...
- Q 4.3. Referring to the previous problem, again suppose that auniform prior is placed on the proportion ?, and that from a randomsample of 327 voters, 131 support the sales tax....
- Q In the average month there is about 150,000 trucks sold acrossthe board. There is about 350,000 vehicles sold every month. Trucksmake up about 43% of the sales every month in...
- Q Two players (player A and player B) are playing agame against each other repeatedly until one is bankrupt. When aplayer wins a game they take $1 from the other...
- Q EXERCISES ON DISCRETE DISTRIBUTIONS6. An exam consists of 12 questions that present four possibleanswers each. A person, without knowledge about the subject of theexam, answers the random exam questions.a.What is...
- Q The distribution of heights of adult men in the U.S. isapproximately normal with mean 69 inches and standard deviation 2.5inches. Use what you know about the EMPIRICAL RULE to answer...
- Q The quality control manager of Ridell needs to estimate the meanbreaking point of a large shipment of helmets sent to thePhiladelphia Eagles. Given the production process, the knownstandard deviation of...
- Q upper quarter. 2. During the years 1998–2012, a totalof 29 earthquakesof magnitude greater than 6.5 have occurred in Papua New Guinea.Assume that the timespent waitingbetween earthquakes isexponential. Do in R...
- Q Joe can choose to take the freeway or not for going to work.There is a 0.4 chance for him to take the freeway. If he choosesfreeway, Joe is late to...
- Q A state highway goesthrough a small town where the posted speed limit drops down to40MPH, but which out of town drivers don’t observe very carefully.Based on historical data, it is...
- Q Consider the following sample data:303222492832a. Calculate the range.b. Calculate MAD. (Round yourintermediate calculations to at least 4 decimal places and finalanswer to 2 decimal places.)c. Calculate the sample variance.(Round your...
- Q What is the purpose of hypothesis testing? Do you see anyrelevance to hypothesis testing in your daily life? This could beschool life, personal life, or work life. Start with work...
- Q There is variation in the migratory behavior of certain birdspecies. Some populations migrate while others do not. A study wasrun on Blue-Tailed Bee-Eaters. The south-east Asia populationmigrates south for the...
- Q 1.Historical records show that the average per capitaconsumption of eggs in the US is 278 (this is per year). Lately,consumers have been getting conflicting advice about the benefitsand dangers of...
- 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 The mean height of adult males in the U.S is about 68.8" with avariance of 11.56". Suppose the mean height of a sample of 31mentally disabled males was found to...
- Q On a planet far far away from Earth, IQ of the ruling species isnormally distributed with a mean of 105 and a standard deviation of14. Suppose one individual is randomly...
- Q Suppose we have a binomial experiment in which success isdefined to be a particular quality or attribute that interestsus.(a)Suppose n = 25 andp = 0.28.(For each answer, enter a number....
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