Basic Math question and answers for October 12, 2023
- Q Car batteryThe mileage of a car battery is exponentially distributed with amean value of 10000 km.(a) What is the probability of a 5000 km trip withoutreplacement of the battery?(b) What...
- Q IncomePerson(Yi)F(Yi)179.60.12138.70.23173.10.34187.80.45201.30.56226.60.67247.40.78289.20.89322.80.910587.91A. The mean or average of the ranked above data for a village inPeru is:a. $245.44b. $345.44c. $123.44d. $200.56B. Suppose that the covariance between the ranked income and thecumulative distribution...
- Q Assume that? women's heights are normally distributed with amean given by ?=63.5 in?, and a standard deviation given by ?=2.1in.?(a) If 1 woman is randomly? selected, find the probability thather...
- Q he final exam grade of a statistics class has a skeweddistribution with mean of 78 and standard deviation of 7.8. If arandom sample of 30 students selected from this class,...
- Q Part 1A company produces steel rods. The lengths of the steel rods arenormally distributed with a mean of 198.9-cm and a standarddeviation of 2.3-cm. For shipment, 22 steel rods are...
- Q Twelve dogs from three different breeds (basenji, Shetlandsheepdog, beagle) were either indulged or disciplined between thethird and eight weeks of their lives. The indulged animals wereencouraged in play, aggression, and...
- Q Determine whether the value is a discrete random? variable,continuous random? variable, or not a random variable.a. The number of bald eagles in a countrynumberof bald eagles in a countryb. The...
- Q The following bivariate data set contains an outlier.xy53.3151.737.1-307.344.6-469.747-475.268.4292.550.3383.555.7-1180.830.7223.760.6-600.839.9-152.649.3-335.250.1590.154.99963.1243.5181.5-6493.5What is the correlation coefficient with theoutlier?rw = (Round to three decimalplaces)What is the correlation coefficient without theoutlier?rwo = (Round to three decimalplaces)
- Q 8.29 In a survey of 1,003 adults concerning complaints aboutrestaurants, 732 complained about dirty or ill-equipped bathroomsand 381 complained about loud or distracting diners at othertables.a. Construct a 95% confidence...
- Q The following probability distributions of job satisfactionscores for a sample of information systems (IS) senior executivesand middle managers range from a low of 1 (very dissatisfied) to ahigh of 5...
- Q Suppose you have selected a random sample of ?=13 measurementsfrom a normal distribution. Compare the standard normal z valueswith the corresponding t values if you were forming the followingconfidence intervals.a) 80%...
- Q If a dependent variable is binary, is it optimal to use linearregression or logistic regression? Explain your answer and includethe theoretical and practical concerns associated with eachregression model. Provide a...
- 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 A market researcher is interested in determining whether the ageof listeners influences their preferred musical styles. Thefollowing is a contingency table from a random sample of 385individuals:AGEStyle_1Style_2Style_318–2512513626–358712636–4550221246+122515A) what are the...
- Q 10. Suppose that X, Y and Z are normally distributed where X ?N(100,100), Y ? N(400, 400) andZ ? N(64,64). Let W = X + Y + Z.a) Describe the...
- Q An Illinois state program evaluator is tasked with studying theintelligence of soon-to-graduate high school students in a numberof Chicago-area high schools.One of the specific questions that needs to be answered...
- Q A random sample of 1600 workers in a particular city found 688workers who had full health insurance coverage. Find a 95%confidence interval for the true percent of workers in this...
- Q Question 3:In “Orthogonal Design for Process Optimization and ItsApplication to Plasma Etching”, an experiment is described todetermine the effect of flow rate on the uniformity of the etch ona silicon...
- Q Describe how conditional probability could be used to betterunderstand data.Descrube a real-world scenario in which this might beapplicable.
- Q "Black Friday" is the day after Thanksgiving and the traditionalfirst day of the Christmas shopping season. Suppose a recent pollsuggested that 66% of Black Friday shoppers are actually buying forthemselves....
- Q Two successive flips of a fair coin is called a trial. 100trials are run witha particular coin; on 22 of the trials, the coin comes up“heads” bothtimes; on 60 of...
- Q 5.a. Analyze the Bread variable in the SandwichAnts dataset usingaov() in R andinterpret your results.The data may be found here:install.packages("Lock5Data")library(Lock5Data)data(SandwichAnts,package="Lock5Data")attach(SandwichAnts)b. State the linear model for this problem. Define all notation...
- Q We throw a die independently four times and let X denote theminimal value rolled. (a) What is the probability that X ? 4. (b)Compute the PMF of X. (c) Determine...
- Q Find the indicated probabilities using the geometric?distribution, the Poisson? distribution, or the binomialdistribution. Then determine if the events are unusual. If?convenient, use the appropriate probability table or technology tofind the...
- Q FORECASTING , THE COMPLETE ANSWERS TO THESE QUESTIONS WILLRECEIVE A THUMBS UP!Weekly demand figures at Hot Pizza are as follows:WeekDemand11082116311841245966119796810291121010211921291Estimate demand for the next 4 weeks using a 4-weekmoving average...
- Q A clinical trial was conducted to test the effectiveness of adrug for treating insomnia in older subjects. Before? treatment, 20subjects had a mean wake time of 105.0 min. After? treatment,...
- Q Starting salaries of 110 college graduates who have taken astatistics course have a mean of $43,598. Suppose the distributionof this population is approximately normal and has a standarddeviation of $8,635.Using...
- Q Problem 4) Five coins are flipped. The first four coins willland on heads with probability 1/4. The fifth coin is a fair coin.Assume that the results of the flips are...
- Q Do college students enjoy playing sports more than watchingsports? A researcher randomly selected ten college students andasked them to rate playing sports and watching sports on a scalefrom 1 to...
- Q Your friend’s professor gives out reasonably hard exams 70% ofthe time, and ridicu- lously hard exams 30% of the time. On hardexams, each student’s score on the exam is a...
- Q The yield of Australia bank stocks has a normaldistribution with s.d. 0.024. A random sample of 10 Australian bankstocks gave the mean yield 0.0538. For the entire Australia stockmarket, the...
- Q LetX1,X2,...Xnbe a random sample of size n form a uniform distributionon the interval [?1,?2].Let Y = min(X1,X2,...,Xn).(a) Find the density function for Y. (Hint: find thecdf and then differentiate.)(b) Compute...
- Q **Only answer G-J, I already did A-F**2. Measuring the height of a California redwood tree is verydifficult because these trees grow to heights over 300 feet. Peoplefamiliar with these threes...
- Q A company announced a "1000 Chips Trial" claiming that every 18ounce bag of its cookies contained at least 1000 chocolate chips.Students purchased random bags from cookies from different storesand counted...
- Q home / study / business / finance / finance questions and answers /a researcher collected data from a random sample of 25 high schoolfreshmen and found the mean ...Question: A...
- Q 9. The table below gives the number of hours five randomlyselected students spent studying and their corresponding midtermexam grades. Using this data, consider the equation of theregression line, yˆ=b0+b1x, for...
- Q The _______ is usually the hypothesis that the researcher wantsto gather evidence against. null hypothesis alternative hypothesis one-tailed hypothesis two-tailed test of hypothesis The _______ is usually the hypothesis for which the researcherwants to gather...
- Q 1. In testing the null hypothesis that p = 0.3 against thealternative that p not equal 0.3, the probability of a Type IIerror is _____________ when p = 0.4 than...
- Q 1. In a study of red/green color blindness, 700 men and 2050women are randomly selected and tested. Among the men, 62 havered/green color blindness. Among the women, 4 have red/green...
- Q Chapter 9, Section 3, Exercise 057Two intervals are given, A and B, for the same value of theexplanatory variable. A: 3.9 to 6.1; B: 2.6 to 7.4(a) Which interval is...
- Q 8. Consider the relationship between the number of bids an itemon eBay received and the item's selling price. The following is asample of 5 items sold through an auction.Price in...
- Q In a study of high school students at least 16 years of age,researchers obtained survey results summarized in the accompanyingtable (based on data from Texting While Driving and Other RiskyMotor...
- Q Use Minitab to answer the questions. Make sure to copyall output from the Minitab:The U.S. Bureau of Labor Statistics publishes a variety ofunemployment statistics, including the number of individuals whoare...
- Q MANAGING ASHLAND MULTI-COMM SERVICESThe AMS technical services department has embarked on a qualityimprovement effort. It’s first project relates to maintaining thetarget upload speed for its Internet service subscribers. Uploadspeeds are...
- Q For questions 2-7: state the appropriate hypotheses; conduct ahypothesis test using ? = 0.05 utilizing the classical approach,confidence interval approach, or p-value approach; state thedecision regarding the hypotheses; and make...
- Q Explain Central Limit Theorem. What is the sampling distribution of the mean?Explain the differences between a discrete random variable and acontinuous random variable.
- Q 5. Listed in the table below are the robbery and aggravatedassault rates (occurrences per 100,000) for the 12 most populatedU.S. cities in 2006:CityRobbery (x)Aggravated Assault (y)New York288330Los Angeles370377Chicago555610Houston548562Phoenix288398Philadelphia749720Las Vegas409508San Antonio180389San...
- Q The paired data values for this test are First ValueSecond Value-9.68-9.89-14.16-12.11-16.16-8.24-13.66-17.15-14.05-14.28-14.66-12.69-11.58-11.69-17.41-15.27-13.89-12.18-13.03-13.63-14.13-12.36There are 11 data pairs. In the test, subtract the First Valuefrom the Second Value. Also,?0 = 0. Compute the teststatistic...
- Q In the survey sponsored by the Lindt chocolate company, 1708women were surveyed and 85% of them said that chocolate made themhappier.a) Is there anything potentially wrong with this survey?b) Of...
- Q Why is sigmoid activation function not recommended for hiddenunits but is fine for an output unit?
- Q Let x represent the number of mountain climbers killedeach year. The long-term variance of x is approximately?2 = 136.2. Suppose that for the past 11 years,the variance has been s2...
- Q A simple random sample of 50 accounts is taken from an accountreceivables portfolio of XYZ Ltd and the average account balance is$650. The population standard deviation o is known to...
- Q In the following problem, check that it is appropriate to usethe normal approximation to the binomial. Then use the normaldistribution to estimate the requested probabilities. It is knownthat 76% of...
- Q Take a simple experiment of rolling a pair of balanced dice.Each die has six sides, each side contains one to six spots. Let usdefine the random variable x to be...
- Q An experiment to compare the spreading rates of five differentbrands of yellow interior latex paint available in a particulararea used 4 gallons (J = 4) of each paint. The sampleaverage...
- Q Exercise 14-4 Algo Consider the following competing hypotheses:H0: ?xy ? 0 HA: ?xy < 0 The sample consists of 34 observationsand the sample correlation coefficient is –0.58. Use Table 2....
- Q Demand data on "Service Orders" for a particular serviceenterprise for the previous 12 months is as follows: 550, 652, 673,707, 725, 752, 780, 797, 815, 836, 850, and 872. Problem...
- Q 1. Introduction: Brief description ofthe study including the purpose and importance of the researchquestion being asked.2. What is the null hypothesis? What isthe research hypothesis?3. Participants/Sampling Method:Describe your sampling method....
- Q A Gallup Poll released in December 2010 asked 1019 adults livingin the Continental U.S. about their belief in the origin of humans.These results, along with results from a more comprehensive...
- Q Suppose a geyser has a mean time between eruptions of 66minutes. If the interval of time between the eruptions is normallydistributed with standard deviation24 minutes?, answer the following question.What is...
- Q The mayor of a large city claims that 25 % of the families inthe city earn more than $ 100,000 per year; 55 % earn between $30,000 and $ 100,000...
- Q * Make sure you turn in your code (take a screen shotof your code in R)and answers. Conduct the hypothesisand solve questions by using R.2) A random sample of 12...
- Q The number of buses that arrive at a bus stop during a one-hourtime span can be modeled as a Poisson process with rate ? (seeRemark below). Now suppose a passenger...
- Q A simple random sample of size n is drawn from a population thatis normally distributed. The sample? mean, x overbar?, is found tobe 110?, and the sample standard? deviation, s,...
- Q A person wants to invest $10,000 into stocks: a high techcompany (T) with an expected annual return of 12% and a risk indexof 8; and a regulated power company (P)...
- Q A trucking company wants to find out if their drivers are stillalert after driving long hours. So, they give a test for alertnessto two groups of drivers. They give the...
- Q Here is a list of scores on the Traditionalism Index for theANES unique group ofrespondents who simultaneously rated Christian Fundamentalistsand Atheistsat 100 on the Feeling Thermometer:7, 10, 5, 6, 5,...
- Q Case studies showed that out of 10,409 convicts who escaped fromcertain prisons, only 7958 were recaptured.(a) Let p represent the proportion of all escapedconvicts who will eventually be recaptured. Find...
- Q A simple random sample of checks were categorized based on thenumber of cents on the written check and recorded below. CentsCategory 0¢-24¢ 25¢-49¢ 50¢-74¢ 75¢-99¢ Frequency 58 37 28 17...
- Q The United States Centers for Disease Control and Prevention(CDC) found that 17.9%17.9% of women ages 1212–5959 testseropositive for HPV?16. Suppose that Tara, an infectious diseasespecialist, assays blood serum from a...
- Q (Please answer this question accuratelly THANKS)The following commands in R computes 5000 simulations of samplemeans of size 12 from a normal distribution with mean µ = 100 andstandard deviation ?...
- Q 26. A sample of 1100 computer chips revealed that 62% of thechips fail in the first 1000 hours of their use. The company'spromotional literature states that 60% of the chips...
- Q Compare the kk-NN classifier, linear discriminant analysis (LDA)and the logistic model when it comes to classification. Which isgenerally better?
- Q An article suggested that yield strength (ksi) for A36 gradesteel is normally distributed with ? = 45 and ? =4.5.(a) What is the probability that yield strength is at most...
- Q A study of long-distance phone calls made from the corporateoffices of the Pepsi Bottling Group Inc. showed the calls followthe normal distribution. The mean length of time per call was...
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