Basic Math question and answers for August 21, 2023
- Q Baseball's World Series is a maximum of seven games, with thewinner being the first team to win four games. Assume that theAtlanta Braves and the Minnesota Twins are playing in...
- Q At a small liberal arts college, students can register for oneto six courses. In a typical fall semester, 5% of students take oneclass, 26% take four classes, and 15% take...
- Q Following are age and price data for 10 randomly selected carsbetween 1 and 6 years old.​ Here, x denotes​ age, in​ years, and ydenotes​ price, in hundreds of dollars. Use...
- Q Question 6In a recent sample of 84 used car sales costs, the sample meanwas $6,425 with a sample standard deviation of $3,156.Assume the underlying distribution is approximately normal.Part I) Which...
- Q Decisions about alpha level may be different, especially as itrelates from hard sciences to social sciences. For example, amedical trial for cancer treatments conducts their statisticaltests at .0001 – so...
- Q A health psychologist tests a new intervention to determine ifit can change healthy behaviors among siblings. To conduct the thistest using a matched-pairs design, the researcher gives one siblingan intervention,...
- Q What would my null and alternative hypothesis be for the healthquestions: to what extend does the age of MI patients vary bygender?
- Q A die is weighted so that rolling a 1 is two times as likely asrolling a 2, a 2 is two times likely as rolling a 3, a 3 is...
- Q among the thirty largest us cities, the mean one-way commutetime to work is 25.8 minutes. the longest one-way travel time is innew york city, where the mean is 37.7 minutes....
- Q An experiment consists of flipping a coin 5 times and noting thenumber of times that a heads is flipped. Find the sample space SSof this experiment.
- Q To benchmark their performance against competing healthcareinstitutions, a radiology center wants to know the average timetaken by their staff to do an MRI test. A sample of 50 randomlyselected MRI...
- Q A traffic inspector has counted the number of vehicles passingthrough a certain point in 100 successive 20 – minute time periods.The observations are listed below.23201618302226155181417113721610202225191919201223241718182716282615291935201712302122201518162324152428192422171981817182321251920222123162019112317231317262614151627182124332021271822172014212210You are required to:a) Present these...
- Q 1)A group of 110 students sat an aptitude test, their resultingscores are presented:6661667670646766716463616567677262646965725376696076706270717171646369657963646661588074616770627169797573726668727267637661756484735376716564617474727870837779676979666270756661757769756368697476797272586765587553626476a)Calculate the mean and standard deviation for the sample. Giveyour answers to 2 decimal places.sample mean = ?sample...
- Q The manufacturer of a portable music player (PMP) has shownthat the average life of the product is 72 months with a standarddeviation of 12 months. The manufacturer is considering using...
- Q Anystate Auto Insurance Company took a random sample of 358insurance claims paid out during a 1-year period. The average claimpaid was $1530. Assume σ = $230.Find a 0.90 confidence interval...
- Q In a typical month, an insurance agent presents life insuranceplans to 40 potential customers. Historically, one in four suchcustomers chooses to buy life insurance from this agent. You maytreat this...
- Q This problem is going to use the data set in R called\"ChickWeight\" that has 4 variables, as described below.ChickWeight:A data frame with 578 observations on 4 variables.1) weight: a numeric...
- Q This problem is going to use the data set in R called\"ChickWeight\" that has 4 variables, as described below.ChickWeight:A data frame with 578 observations on 4 variables.1) weight: a numeric...
- Q For borrowers with good credit scores, the mean debt forrevolving and installment accounts is $15,015. Assume the standarddeviation is $3,540 and that debt amounts are normallydistributed.What is the probability that...
- Q For borrowers with good credit scores, the mean debt forrevolving and installment accounts is $15,015. Assume the standarddeviation is $3,540 and that debt amounts are normallydistributed.What is the probability that...
- Q Consider the data set below.65 68 58 57 71 61 60 67 66 7260 62 54 57 61 54 55 58 61 5564 66 56 61 51 83 57 55...
- Q Please show all work. Thank you!The amount of money requested on home loan applications atAmerica Bank follows normal distribution, with a mean of $180,000and a standard deviation of $6,000. A...
- Q Do bonds reduce the overall risk of an investment portfolio? Letx be a random variable representing annual percent returnfor Vanguard Total Stock Index (all stocks). Let y be arandom variable...
- Q 1. According to a 2011 report by the U.S. Department of Labor,civilian Americans spend 2.75 hours per day watching television. Afaculty researcher, Dr. Sameer, at California Polytechnic StateUniversity (Cal Poly)...
- Q apply statistical methods and analysis. Unless otherwise stated,use 5% (.05) as your alpha level (cutoff for statisticalsignificance).#1.  For each example, state whether the one-sample,two-independent-sample, or related-samples t test is mostappropriate. If...
- Q An economist is studying the job market in Denver areaneighborhoods. Let x represent the total number of jobs in a givenneighborhood, and let y represent the number of entry-level jobs...
- Q In a clinical study, volunteers are tested for a gene that hasbeen found to increase the risk for a disease. The probability thata person carries the gene is 0.1. Assume...
- Q What is the value to us in the twenty-first century of having anaccurate demographic picture of earlier centuries? Explain indetail and provide an example.
- Q Let X have a binomial distribution with parametersn = 25and p. Calculate each of the following probabilitiesusing the normal approximation (with the continuity correction) forthe casesp = 0.5, 0.6, and...
- Q 2. To see why this is relevant to our analysis of thearrangement of energy in degrees of freedom, first take a simpleproblem in the ways that you can arrange some...
- Q Let Z be a standard normal random variable and calculate thefollowing probabilities, drawing pictures wherever appropriate.(Round your answers to four decimal places.) (a) P(0 ≤ Z ≤ 2.13)(b) P(0 ≤...
- Q A particular poll tracks daily the percentage of citizens from acertain country who approve or disapprove of the job the Presidentis doing. Daily results are based on telephone interviews withapproximately...
- Q An online account password for a certain website consists ofeight characters, where at least one must be a digit (i.e. a numberfrom 0-9).a. How many different passwords are possible if...
- Q 5. An important characteristic of histograms, frequencypolygons, and stem and leaf displays is a. size. b. total area. c.relative area. d. shape. 6. A frequency distribution ofstandardized IQ scores for...
- Q 10.  What is the true state of thepopulation and what decision was made in a Type 1error.  Give a concrete example.
- Q Among frequency distributions for physical stamina scores, thegreatest variability probably would occur in the distribution forwell‑trained athletes.patients at a health clinic.infants.the general population.When calculating the variance, each deviation is squared...
- Q Scientific research on popular beverages consisted of 65 studiesthat were fully sponsored by the food industry, and 35 studies thatwere conducted with no corporate ties. Of those that were fullysponsored...
- Q Discuss the advantages and disadvantages of all threemeasures of central tendency; mean, median, and mode. Give specificexamples of situations in which you would find these measuresuseful.
- Q a. Name measures of spread or variability.b. Explain the concept of error and uncertainty as it relates todecision making.c. What are the formulas to calculate the ?Ì…2 (adjusted Rsquare)?
- Q Investment advisors agree that​ near-retirees, defined as peopleaged 55 to​ 65, should have balanced portfolios. Most advisorssuggest that the​ near-retirees have no more than​ 50% of theirinvestments in stocks.​ However,...
- Q Given a normal distribution with mu equals 100 and sigma equals10 comma complete parts​ (a) through​ (d). cumulative standardizednormal distribution table.a. What is the probability that Upper X greater than...
- Q Distinguish between random and assignable variation. Discuss therelevance of each to measuring quality of care and to the designand evaluation of quality improvement initiatives.
- Q In your own words, explain what an outlier is.
- Q You apply for a summer internship with a startup company, andyour chance of getting an offeris 80% if you well prepare for an interview. Otherwise, youwill only get 20% chance...
- Q Alfraed and Broetschen have each put $500 into a pool and bet onthe winner of the 2057 Stanley cup which goes to the first team towin 4 games out of...
- Q Four numbers are selected without replacement from{1,2,3,4,5,6,7} to form a 4-digit number. What is the probabilitythat the number is greater than 6543?
- Q Suppose three competing airlines each schedule their own flightto Waco which arrives there between 2:00 and 3:00 pm according to acontinuous uniform distribution. All three flights are mutuallyindependent.(a) If Ralph...
- Q The weight of Coca Cola cans is being analyzed. Thirteen cans,randomly selected from the process, are measured, and the resultsare as follows (in fluid ounces): 16.01, 16.01, 16.02, 16.03,16.05, 16.07,...
- Q URGENTa) samples of rejuvenated mitochondria are mutated (defective)with probability 0.2.find the probability you need to examine atleast 6 samples to find 2 samples containing mutations.reportanswers to 3 decimal places.(try to...
- Q Consider a sample of size 100 drawn from a populationthat obeys an unknown distribution. It is known that thepopulation-variance (of some quality characteristic) is 6. Let µdenote the population-mean. Consider...
- 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 Thirty-three small communities in Connecticut (population near10,000 each) gave an average of x = 138.5 reported cases of larcenyper year. Assume that σ is known to be 43.7 cases per...
- Q In testing the difference between the means of two normallydistributed populations, if μ1 =μ2 = 50, n1 = 9, andn2 = 13, the degrees of freedom for thet statistic equals...
- Q (1 point) Rework problem 17 from section 3.2 of your text,involving the sum of the numbers showing on two fair six-sideddice.(1) What is the probability that exactly one die shows...
- Q What z-score separates the highest 3 percent of the standardnormal distribution from the lower 97 percent (i.e. represents the97th percentile)?
- Q Suppose a friend of yours is hosting a wine tasting. His winesupply includes three different types of deluxe wine. All bottlescome from the same winery and all wines were harvested...
- Q Explain how a sample, a sampling distribution, and a populationdiffer. What are the means and standard deviation for each ofthese?
- Q In a population survey of patients in a rehabilitation hospital,the mean length of stay in the hospital was 12.0 weeks with astandard deviation equal to 1.0 week. The distribution was...
- Q CHF patientsNumber of Drugs AdministeredReadmittedNot readmittedTotal≥3 drugs20040240<3 drugs1009001000Total3009401240Your team needs to decide how to measure the effectiveness ofthis measure. You think the best way would be to compute the valuesof...
- Q Question is related to organisations and stakeholders.Different stakeholders have different expectations from thecompany. select a small/ medium enterprise and list 11 stakeholdersrelated to the enterprise and their individual concerns.
- Q 5.30 A concern to public health officials is whether aconcentration of lead in the paint of olderhomes may have an effect on the muscular development of youngchildren. In order to...
- Q What price do farmers get for their watermelon crops? In thethird week of July, a random sample of 40 farming regions gave asample mean of x = $6.88 per 100...
- 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 four nonstandard dice, whose sides are labeled asfollows (the 6 sides on each die are equally likely).A: 4, 4, 4, 4, 0, 0B: 3, 3, 3, 3, 3, 3C:...
- Q The thickness of a printed circuit board is an importantquality parameter. Data on board thickness (in inches) are given inTable 6 for 25 samples of three boards each.(a) Set up...
- Q Suppose we have a binomial experiment in which success isdefined to be a particular quality or attribute that interestsus.(a)Suppose n = 45 andp = 0.13.(For each answer, enter a number....
- Q The board of directors for a particular companyconsists of 10 members, 6 of whom are loyal to the current companypresident and 4 of whom want to fire the president. Suppose...
- Q Generate 1000 random numbers from ??3? starting with standardnormal random numbers in R.
- Q Generate 1000 random numbers from ??2, 5? starting with standardnormal random numbers in R.
- Q Suppose you are dealt 5 random cards from a standard deck of 52cards, where all cards are equally likely to appear.(a) What is your outcome space?(b) What is the probability...
- Q An experiment consists of rolling 1 red die, 1 white die, and 1blue die and noting the result of each roll. The dice are fair, andall out comes are equally...
- Q 1. CPK and SGOT tests are used in the diagnosis of myocardialinfarction (MI). When the CPK test is given to a patient who doesnot have a MI, the probability of...
- Q The random variable X, which denotes the interval between twoconsecutive events, has the PDF: fx (?) = 4?^( 2)?^( −2?) ? ≥ 0 Ifwe assume that intervals between events are...
- Q The accompanying data set provides the closing prices for fourstocks and the stock exchange over 12 days:DateABCDStock Exchange9/3/10127.3718.3421.0315.5110432.459/7/10127.1518.1820.4415.5110334.679/8/10124.9217.8820.5715.8210468.419/9/10127.3517.9520.5216.0210498.619/10/10128.3717.8220.4215.9810563.849/13/10128.3618.6421.1616.2110616.079/14/10128.6118.8321.2916.2210565.839/15/10130.1718.7921.6916.2510627.979/16/10130.3419.1621.7616.3610595.399/17/10129.3718.8221.6916.2610517.999/20/10130.9719.1221.7516.4110661.119/21/10131.1619.0221.5516.5710687.95Using Excel's Data Analysis Exponential Smoothing tool, forecasteach of the stock prices using...
- Q Please show all work and all steps.1.) Two cards are drawn from a standard 52-card playing deck.What is the probability that the draw will yield an ace and a facecard?2.)...
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