Basic Math question and answers for July 27, 2023
- Q how do I adapt a backward selection approach to select the keyindependent variables for a model and also check multicollinearityissues for the selected variablesThanks
- Q Please prepare a summary and response for 'The genius atGuinness and his statistical legacy'
- Q TABLE 4-8 (According to the record of the registrar's office ata state university, 35% of the students are freshman, 25% aresophomore, 16% are junior, and the rest are senior. Among...
- Q The mayor of a town has proposed a plan for the annexation of anew community. A political study took a sample of 1600 voters inthe town and found that 68%...
- Q 2. Consider the following data:x= 1, 2, 3, 4, 5y =3, 2, 4, 6, 5By hand, not using Matlab, and showing your work:(a) Compute the correlation coefficient.(b) Find the least-squares...
- Q (Please type out. I struggle to readhandwriting.)2. Collette is self-employed and sells cookware at home parties.She wants to estimate the average amount a client spends at eachparty. A random sample...
- Q explain how hypothesis testing and statisticalinferences are useful in industry, academic, and scientificresearch. Do you think these methods are useful?
- Q A random sample of 350 bolts from machine A contained 35defective bolts, while an independently chosen, random sample of250 bolts from machine B contained 17 defective bolts. LetP1 be the...
- Q The accompanying data show the number of people working and thesales for a small bookstore. The regression line is given below.The bookstore decides to have a gala event in an...
- Q Apply the requirements, rules, or recommendations that can guideorganizations into successful implementations of embedded analyticsby selecting a case study from your own work environment.
- Q Consider the following time series data. Week 1 2 3 4 5 6 Value18 13 17 12 17 15 a. Which of the following is a correct timeseries plot for...
- Q Michelle runs a bakery that sells two kinds of cookies. Michelleknows the bakery must make at least 10 and at most 48 trays of theNutty Squirrels. The bakery must also...
- Q A psychologist wants to see if a certain company has fair hiringpractices in an industry where 60% of the workers are men and 40%are women. She finds that the company...
- Q Chipotle Mexican Grill continues to suffer from perceptionissues after a string of outbreaks, including E.coli, worriedcustomers about the safety of eating at the fast-casual chain.Chipotle’s strategy for getting customers back...
- Q A suburban hotel derives its revenue from its hotel andrestaurant operations. The owners are interested in therelationship between the number of rooms occupied on a nightlybasis and the revenue per...
- Q Question 2 Part a)Calculate the statistic, set up the rejection region,interpret the result, and draw the sampling distribution.i)ii)Part b)H0: H1:Given that: ?=10, n=100,H0: H1:Given that: ?=15, n=100,?=10 ??10X =10, ?=0.05....
- Q What is the purpose of Reverse testing? (select all thatapply)A.Reverse testing will allow a read of an entire campaign responsedropB.Reverse testing is the principle of only changing one aspect ofthe...
- Q Provide an example of where you could use correlation in reallife. Explain why a t-test is necessary before you accept thiscorrelation as being real in the population."Please give extreme step...
- Q 1.Conduct an analysis and hypothesis test of your choice on thedata you collected. Write a 250-500 word research summary of thefindings generated in the assignments for Topics 2 through 5....
- Q The polling organization Ipsos conducted telephone surveys inMarch of 2004, 2005 and 2006. In each year, 1001 people age 18 orolder were asked about whether they planned to use a...
- Q According to Harper’s magazine, the time spend by kids in frontof the television set per year can be modeled by a normaldistribution with a mean equal to 1500 hours and...
- Q I'm having a pretty difficult time with these types of problemsand I'd really appreciate it if someone could show me how to goabout doing this one, thank you!1. Consider the...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.A random sample of 5913 physicians in Colorado showed that 3062provided at...
- Q CustomerNumber of casesDelivery Time15232.126434.837336.248537.859537.8610339.7711638.5812141.9914344.21015747.111161431218449.41320257.21421856.81524360.61625461.21726758.21827563.11928765.62029867.3Management 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...
- Q For each of the research studies described below, select whichof the following analyses would be most appropriate. Please typeyour answers in the boxes exactly as they areprinted here. I will...
- Q A scientific study on speed limits gives the following datatable.Average speed limitAverage annualfatalities25162729293832713593Using technology, it was determined that the total sum ofsquares (SST) was 4029.2, the sum ofsquares regression (SSR)...
- Q A psychologist specializing in marriage counseling claims that,among all married couples, the proportion p for whom hercommunication program can prevent divorce is at least 77%. In arandom sample of 240...
- Q You wish to test the following claim (HaHa) at a significancelevel of ?=0.005?=0.005.Ho:?1=?2Ho:?1=?2Ha:?1<?2Ha:?1<?2You believe both populations are normally distributed, but youdo not know the standard deviations for either. And you...
- Q how do we interpret how typical a score is compare to thepopulation based on the population mean and standard deviation
- Q A major oil company has developed a new gasoline additive thatis supposed to increase mileage. To test this hypothesis, ten carsare randomly selected. The cars are driven both with and...
- Q Q) Let Xbe adiscrete random variable representing the maximum value of the twonumbers onthrowing two identicalbalanced dice for one time only. Then:a) Find the possiblevalues of the random variable X...
- Q Question 12 (1 point)X28233048402526Y91106112192155130101The coefficient of determination for the above bivariate datais:Question 12 options:0.600.700.800.90
- Q 3. What is the width of 68% confidence interval in terms ofstandard deviation (How many standard deviation is equivalent tothe width of 68% confidence interval)? What about 95% and 99.7%?...
- Q Hogg's Probability and Statistical Inference (9th Edition) -Problem 1.4-20E - How is this problem solved?Hunters A & B shoot at a target with probabilities of p1 andp2, respectively. Assuming independence,...
- Q 7. Hunting :The probability that an eagle kills a rabbit in a day of huntingis 10%. Assume that results are independent for each day.(a) Write the probability mass function for...
- Q A developmental psychologist would like to know whetherthere is a difference in the sociability scores of childrenaccording to the number of siblings they have. He chose threerandom samples of n...
- Q A report states that the mean yearly salary offer for studentsgraduating with a degree in accounting is $48,757. Suppose that arandom sample of 50 accounting graduates at a large university...
- Q What is the percentageof shared variance between the midterm and final grades in thetable below?MidtermFinal55100608078927995809055906440897590709282947010010013%17%25%Less than 1%
- Q Explain what a meta-analysis is (i.e., what is a meta-analysisin terms of effect sizes).
- Q How many even 4-digit numbers can be formed from the digits 1,2, 3, 6, and 9 with no repetitions allowed? (Hint: Tryfilling the units place first.)
- Q Consider the following sample data for the relationship betweenadvertising budget and sales for Product A: Observation 1 2 3 4 5 67 8 9 10Advertising ($) 60,000 70,000 70,000 80,000...
- Q An engineer at a microcircuit factory will inspect a batch ofsilicon wafers to try to find defects. Assume that there are fourdefective integrated circuits in a container containing twentywafers. For...
- Q UIT is a computer retail store that sells two kinds ofmicrocomputers: desktops and laptops. The company earns $220 profiton each desktop computer it sells and $500 profit on each laptop.The...
- Q A sample of 150 individuals (males and females) was surveyed,and the individuals were asked to indicate their yearly incomes.Their incomes were categorized as follows.Category 1$20,000up to$40,000Category 2$40,000up to$60,000Category 3$60,000up to$80,000Income...
- Q Suppose that we are at time zero. Passengers arrive at a trainstation according to a Poisson process with intensity ?. Computethe expected value of the total waiting time of all...
- Q Please provide a detailed description of an original example(i.e., something not discussed in class or the textbook) of asituation in which a paired samples t-test would be mostappropriate.
- Q 2. A sample of 100 is selected from a population with mean µ =100 and ? = 20.0.(a) Describe the sampling distribution of the sample meanX¯.(b) Find P(X >¯ 105).(c)...
- Q A publisher reports that 42% of their readers own a particularmake of car. A marketing executive wants to test the claim that thepercentage is actually different from the reported percentage....
- Q A medical researcher wants to compare the pulse rates of smokersand non-smokers. He believes that the pulse rate for smokers andnon-smokers is different and wants to test this claim at...
- Q According to literature on brand loyalty, consumers whoare loyal to a brand are likely to consistently select the sameproduct. This type of consistency could come from a positivechildhood association. To...
- Q An automobile manufacturer claims that its van has a 38.4miles/gallon (MPG) rating. An independent testing firm has beencontracted to test the MPG for this van since it is believed thatthe...
- Q Karin arrives at the post office, which opens at 9:00 a.m., at9:05 a.m. She finds two cashiers at work, both serving one customereach. The customers started being served at 9:00...
- Q d. Identify the pair of independent variablesthat are the most strongly related to each other.e. Identify the pair of independent variablesthat are the least strongly related to each other.f. For...
- Q HOMEWORK 1This assignment is designed to illustrate how a software packagesuch as Microsoft Excel supplemented by an add-in such as PHStatcan enable one to calculate minimum sample sizes necessary in...
- Q Prove:(?) ???=? ( ???? )2 =? ?2?[(??2)/n] (SumSquares X)(?) ???=?( ???? )2=? ?2?[(? ?2)/?](Sum Squares Y)(?) ??? =?( ???? ) ( ???? )=? ???[(??)(??)?] (Sum Products X,Y)
- Q Dual-energy X-ray absorptiometry (DXA) is a technique formeasuring bone health. One of the most common measures is totalbody bone mineral content (TBBMC). A highly skilled operator isrequired to take the...
- Q . A chemist wishes to detect an impurity in acertain compound that she is making. There is a test that detectsan impurity with probability 0.92; however,This test indicates that an...
- Q Statistics QuestionData provided below(To be done with EVIEWS or any other data processor)d)e) In general, we can conduct hypothesis tests on apopulation central location with EViews by performing the (onesample)...
- Q To what extent do syntax textbooks, which analyze thestructure of sentences, illustrate gender bias? A study of thisquestion sampled sentences from 10 texts. One part of the studyexamined the use...
- Q A distribution of values is normal with a mean of 80 and astandard deviation of 18. From this distribution, you are drawingsamples of size 13. Find the interval containing the...
- Q what applied statistical strengths exist in analyzingof TV and/or movieratings?aa
- Q An environmentalist wants to find out the fraction of oiltankers that have spills each month.Step 2 of 2 : Suppose a sample of 516 tankers is drawn. Of these ships, 393did...
- Q The median US salary is $50,700, according to US Census data.Using a one-samplet-test, test to see if participant income (INC1) is differentfrom the national average. Use a two-tailed test and...
- Q Describe one probability sampling strategy and onenonprobability sampling strategy.
- Q Explain how randomization, in general, can obtain balance onmeasured and unmeasured confounding
- Q Agan Interior Designprovides home and office decorating assistance to its customers. Innormal operation, an average of 2.7 customers arrive each hour. Onedesign consultant is available to answer customer questions andmake...
- Q You are the production manager for a part manufacturing company.There are 2 manufacturing locations, plant A and B. you suspectthere is a difference in the proportion of rejected parts that...
- Q howdoes one build up a hierachical bayesian equation in small areaestimation of unemployment rates using sample weights?
- Q At a train station, international trains arrive at a rate ? = 1.At the same train station national trains arrive at rate ? = 2. Thetwo trains are independent.What is...
- Q Breast-feeding mothers secrete calcium into their milk. Some ofthe calcium may come from their bones, so mothers may lose bonemineral. Researchers measured the percent change in mineral contentof the spines...
- Q What’s the difference between parametric and non-parametricmeasures.
- Q A psychologist has designed a questionnaire to measureindividuals' aggressiveness. Suppose that the scores on thequestionnaire are normally distributed with a standard deviation of80 . Suppose also that exactly 10% of...
- Q Question (statistics) (Data below) (to be done with EVIEWS orany data processor)Millions of investors buy mutual funds, choosing from thousandsof possibilities. Some funds can be purchased directly from banksor other...
- Q Air-USA has a policy of booking as many as 21 persons on anairplane that can seat only 19. (Past studies have revealed thatonly 85% of the booked passengers actually arrive...
- Q Ross White’s machine shop uses 2,500 brackets during thecourse of a year, and this usage is relatively constant throughoutthe year. These brackets are purchased from a supplier 100 milesaway for...
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