Basic Math question and answers for September 08, 2023
- Q Overproduction of uric acid in the body can be an indication ofcell breakdown. This may be an advance indication of illness suchas gout, leukemia, or lymphoma.† Over a period of...
- Q Consider the following table of data that was generated fromrandomly surveying 100 people and recording how much change (fromcoins) was in their pockets:0.330.010.690.040.460.161.670.120.030.170.090.170.570.040.290.850.461.170.020.120.741.720.280.121.370.610.061.460.420.030.390.100.020.201.081.270.301.130.060.273.760.430.040.370.090.090.221.060.090.010.171.230.121.510.130.180.500.730.030.630.050.360.110.740.120.900.910.120.380.020.170.200.400.470.360.990.351.271.641.670.740.040.620.080.090.150.010.051.030.150.090.490.890.180.100.151.271.230.340.421. Construct a histogram of the empirical data....
- Q Assume that f is differentiable at a.Compute limn??n?i=1k[f(a+in)?f(a)]Deduce the limit limn??n?i=1k[(n+i)mnm?1?1]
- Q Suppose a legislator is deciding whether they should put in theeffort to draft a bill. The legislator only wants to do this ifthey are convinced that a majority of their...
- Q Use the R script toanswer the following questions: (write down your answers in the Rscript with ##)(1). ImportFarmSize.csv to Rstudio. Use the correct function to build a linearregression model predicting...
- Q Studies have shown that the frequency with which shoppers browseInternet retailers is related to the frequency with which theyactually purchase products and/or services online. The followingdata show respondents age and...
- Q Assume that a sample is used to estimate a population mean ??.Find the 95% confidence interval for a sample of size 56 with amean of 65.3 and a standard deviation...
- Q The following relative frequency distribution was constructedfrom a population of 550. Calculate the population mean, thepopulation variance, and the population standard deviation.(Negative values should be indicated by a minus sign....
- Q What are the advantage and disadvantage of assuming quadraticutility functions in mean variance analysis?
- Q Given are five observations for two variables, x and y. x i 1 23 4 5 y i 4 7 6 11 13 Round your answers to two decimal places....
- Q 2) Natural History magazine has published a listing of themaximum speeds, in mph, for a wide variety of animals. A randomsample of four of these animals, along with their maximum...
- Q What is the critical F value when the sample size for thenumerator is sixteen and the sample size for the denominator isten? Use a two-tailed test and the 0.02 significance...
- Q Drive-through Service Time at McDonald’s When you are on the goand looking for a quick meal, where do you go? If you are likemillions of people every day, you make...
- Q In the following table, the random variable x represents thenumber of laptop computers that failed during a drop-test of sixsample laptops. Use the table to answer the questions a) -...
- Q Shoe Size12611138988991151087711999128881291181181359811We need to find the confidence interval for the SHOE SIZEvariable. To do this, we need to find the mean and standarddeviation with the Week 1 spreadsheet. Then we...
- Q How many scores are between 2 standard deviations above andbelow the mean in a normal distribution?A score is 3 standard deviations above the mean in a normaldistribution. How much of...
- Q Ifassessment results are highly valid, will they also be highlyreliable.If assessment results are highly reliable, they may or may notbe valid.In selecting an assessment, validity has priority overreliability.Give example of...
- Q Complete the frequencytable above by filling in the frequency of raw scores occurring ineach interval, using the following data:30, 32, 11, 14, 40,37, 16, 26, 12, 33, 13, 19, 38,...
- Q 3.27. Problem. (Section 11.5) The following are applications ofTheorem 11.6 or the Central Limit Theorem.(a) Determine the distribution of (1/5)X1 + (2/5)X2 + (2/5)X3 if X1,X2 and X3 are independent...
- Q A sample of size =n72 is drawn from a population whose standarddeviation is =?25. Part 1 of 2 (a) Find the margin of error for a95% confidence interval for ?....
- Q Strategies for treating hypertensive patients bynonpharmacologic methods are compared by establishing three groupsof hypertensive patients who receive the following types ofnonpharmacologic therapy:Group 1: Patients receive counseling forweight reductionGroup 2: Patients receive counseling...
- Q In a poll, 412 of 1030 randomly selected adults aged 18 or olderstated that they believe there is too little spending on nationaldefense. Use this information to complete parts (a)...
- Q Problem 3.The average number of thefts at LeBow is three per month. (a)Estimate the probability, p, that at least six thefts occur atLeBow during December. (What inequality are you using?)(b)...
- Q To carry the Energy Star Logo, a 25 cubic-foot French-doorrefrigerator must use no more than 574 kW-h/year (ignore the weirdunits). If they use significantly more than that, they are removedfrom...
- Q A survey on men and women’s shopping behavior collected datafrom a sample of 50men and 50 women. The following data on online shopping spendingevery month.Men Women148 272211 176256 251309 235190...
- Q Kay listens to either classical or country music every day whileshe works. If she listens to classical music one day, there is a66% chance that she will listen to country...
- Q 21. Bob’s local pizza place claims it delivers pizzas in 30minutes on average. Bob is convinced it’s more than that. He does ahypothesis test and gets a p-value of .001.a....
- Q 1. In an instant lottery, your chances of winning are 0.1. Ifyou play the lottery six times and outcomes are independent,determine the probability that(i) you win at most once.(ii) you...
- Q 1. A sociologist claims that children ages 6-17 spend less timewatching television today than children ages 6-17 in 200 1 did. Astudy was conducted recently and a similar study was...
- Q 1. Young children in the U.S. are exposed to an average of 4hours of television per day, which can adversely impact a child’swell-being. You are working in a research lab...
- Q In an attitude test, 55 out of 120 persons ofCommunity 1 and 115 persons out of 400 of Community 2 answered“Yes” to a certain question. Do these two communities differfundamentally...
- Q You collect data to answer theresearch question, “Are high school boys involved in moreautomobile accidents than high school girls?” After conducting ahypothesis test, you conclude that there is sufficient evidence...
- Q Eight male and eight female collegestudents who have credit cards were surveyed and asked their totalcredit card debt. The responses are given below in dollars:Males10002100900120013005001400700Females13005002000180013001000260014001. Is this an observational study...
- 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 St. Andrew’s University receives 900 applications annually fromprospective students. The application forms contain a variety ofinformation including the individual’s scholastic aptitude test(SAT) score and whether or not the individual desires...
- Q Listed below are the log body weights and log brain weights ofthe primates species in the data set ”mammals”. Find the equationof the least squares line with y = log...
- Q The home run percentage is the number of home runs per 100 timesat bat. A random sample of 43 professional baseball players gavethe following data for home run percentages.1.62.41.26.62.30.01.82.56.51.82.72.01.91.32.71.71.32.12.81.43.82.13.41.31.52.92.60.04.12.91.92.40.01.83.13.83.21.64.20.01.21.82.4(a) Use...
- Q If a random variable has a uniform distribution over the range10 ?X? 20, what is the probability that the random variable takes avalue in the range [13.75, 17.25]?
- Q Q4. To determine the effectiveness of the advertising campaignfor a new digital video recorder, management would like to knowwhat proportion of the households is aware of the brand. Theadvertising agency...
- Q Porphyrin is a pigment in blood protoplasm and other body fluidsthat is significant in body energy and storage. Let x be arandom variable that represents the number of milligrams ofporphyrin...
- Q Which of the following statements about the general exponentialequation y = 600 (1.05)t is true? (Assume t is time in years, witht = 0 in 1950.) Check all that apply.A)After...
- Q First National Bank employs three real estate appraisers whosejob is to establish a property’s market value before the bankoffers a mortgage to a prospective buyer. It is imperative thateach appraiser...
- Q Consider a refinery that produces three types of motor oil:Standard, Ex- tra, and Super. The selling prices are $9.00, $13.00,and $19.00 per barrel respectively. These oils can be made fromthree...
- Q Ten observations were selected from each of 3 populations and ananalysis of variance was performed on the data. The following arethe results:Source of variationSum of squaresdegrees of freedommean squareFBetween treatments82.4Within...
- Q A chemical company produces two chemicals, denoted by 0 and 1,and only one can be produced at a time. Each month a decision ismade as to which chemical to produce...
- Q Dmitry suspects that his friend is using a weighted die forboard games. To test his theory, he wants to see whether theproportion of odd numbers is different from 50%. He...
- Q 1. A university wants to estimate the proportion of its studentswho smoke regularly. Suppose that this university has N = 30, 000students in total and a SRSWOR of size n...
- Q Select all of the true statements about the standard deviationof a quantitative variable.1.The standard deviation of a group of values is a measure ofhow far the values are from the...
- Q Assume that random variable x^2 has a chi-squared distributionwith v degree of freedom. Find the value of “A” for the followingcases1) P(X^2 <=A) =.95 when v = 62) P(X^2>=A) =.01...
- Q To create the following problem the other problem with allsamples n =5; the same sample means and variances that appeared inthe problem were used but the sample size was doubled...
- Q Q1) A group of wine enthusiasts tested a pinot noir wine fromOregon. The evaluation was to grade the wine on a 0 to 100 pointscale. The results are as follows:...
- Q According to Harper's Index, 40% of all federal inmates areserving time for drug dealing. A random sample of 16 federalinmates is selected.(a) What is the probability that 11 or more...
- Q As part of a long-term study of individuals 65 yars of age orolder, sociologists and physicians at the Institute of MentalHealth Research in Ottawa,investigated the relationship between geographic location anddepression....
- Q I want to find out what the undergraduate student bodythinks about the move to Division I sports, which will involvehigher student fees to support the athletic program. Every eveningI go...
- Q What is the meaning of the term "multicollinearity? Why is itimportant in assessing the strength of a multiple regressionmodel?
- Q The American Bankers Association reported that, in a sample of150 consumer purchases in France, 74 were made with cash, comparedwith 28 in a sample of 60 consumer purchases in the...
- Q Suppose that there are two schools in a region. 7% of studentswill move from school A to school B at the end of each year, while11% of students will move...
- Q Before opening the dataset needed for this problem, you’ll needto call the “car” package:> library(car)?Now you can import the “Wong” dataset and use it to answer thequestion below.Remember to include...
- Q Evaluate the given expression and express the results using theusual format for writing numbers (instead of scientific notation)32C2=
- Q Similar Tests - Facebook Friends: You want totest the following similar claims about the number of Facebookfriends that college students have.For each test, choose the appropriate null hypothesis.(a) Claim: The...
- Q Suppose that we want to test the hypothesis that mothers withlow socioeconomic status (SES) deliver babies whose birthweightsare different than "normal". To test this hypothesis, a list ofbirthweights from 69...
- Q In regards to Statistics: the exploration and and analysis ofdata (7th edition), chapter 13, question 43. Part a of the questionasks for the equation of an estimated regression line. The...
- Q Medical researchers have noted that adolescent females are muchmore likely to deliver low-birth-weight babies than are adultfemales. Because low-birth-weight babies have a higher mortalityrate, a number of studies have examined...
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.† Suppose a small group of 13Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q You are to take a multiple-choice exam consisting of 100questions with five possible responses to each. Suppose that youhave not studied and so must guess (select one of the five...
- Q SELLING PRICESQUARE FOOTAGEBEDROOMSAGE (YEARS)84,0001,67023079,0001,33922591,5001,712330120,0001,840340127,5002,300318132,5002,234330145,0002,311319164,0002,37737155,0002,736410168,0002,50031172,5002,50043174,0002,47933175,0002,40031177,5003,12440184,0002,50032195,5004,062410195,0002,854332.) Solve this question by hand:Develop a regression model to predict selling price based on thesquare footage. Find the value of beta(regression coefficient),coefficient of determination. Test for...
- Q 2. It is estimated that the standard deviation of the heightof American adult males is 4 inches. Suppose we survey a sample of50 men and find a sample mean of...
- Q Data for the mean mass of various animal species and theircorresponding metabolic rate is provided below. It is believed thatthe data follows the power model. i.e. ?????????? = ? (????)?...
- Q Can someone please explain these problems, I don't understand,please and thank you!!The patients in the Digoxin trial dataset can be considered apopulation of people suffering from heart failure. These patientswere...
- Q A global research study found that the majority of? today'sworking women would prefer a better? work-life balance to anincreased salary. One of the most important contributorsto?work-life balance identified by the...
- Q Assume that the distribution of starting salaries for newlyqualified CA’s is approximately Normal and has a std deviation of$2,500. We have a random sample of 16 CA’s.a) Find the probability...
- Q Write an analysis (essay) forquestion2) The table summarizes the resultsfrom an observational study that followed a random sample of 8,474people for about four years. All participants were free from heartdisease...
- Q Problem 2.3 Suppose that we take the universal set U to be theintegers. Let S be the even integers, letT be the integers that canbe obtained by tripling any one...
- Q A company wants to ship products from Jefferson City and Omahato Des Moines, Kansas City or St. Louis.In the table below you see shipping costs and supply and demandamounts.How do...
- Q f(x) = 3e ?3x x > 00 otherwise.Find the expected value and variance of the random variable.
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