Statistics question and answers for August 29, 2023
- Q The Wind Mountain archaeological site is located in southwesternNew Mexico. Wind Mountain was home to an ancient culture ofprehistoric Native Americans called Anasazi. A random sample ofexcavations at Wind Mountain...
- Q Whyare the Maximin, Maximax, and the Minimax regret models? Notappropriate? When some conditions and probabilities have a moderatelevel of certainty or predictability?
- Q A. As a health policy expert, you are interested in knowingwhether men and women in the United States differ in the frequencythey visit doctors when sick. So you conduct a...
- Q 1. It is believed that nearsightedness affects about 8% of allchildren. In a random sample of 194 children, 21 arenearsighted.(a) Construct hypotheses appropriate for the following question: dothese data provide...
- Q How can you demonstrate that the probability of X successes in abinomial distribution is given by P(X=x)=nCx p^x q^(n-x)
- Q Use simulation in SAS.FICO scores nationally have an average of 640 with a standarddeviation of 60. If you simulated the credit scores of 10,000borrowers, what percent of FICO scores are...
- Q In the Southern Ocean food web, the krill species Euphausiasuperba is the most important prey species for many marinepredators, from seabirds to the largest whales. Body lengths of thespecies are...
- Q Visit the NASDAQ historical prices weblink. First, set the daterange to be for exactly 1 year ending on the Monday that thiscourse started. For example, if the current term started...
- Q A family consisting of four persons—A, B, C, and D—belongs to amedical clinic that always has a doctor at each of stations 1, 2,and 3. During a certain week, each...
- Q An experiment on memory was performed, in which 16 subjects wererandomly assigned to one of two groups, called \"Sentences\" or\"Intentional\". Each subject was given a list of 50 words. Subjectsin...
- Q A chemist analyzes seawater samples for two heavy metals: leadand mercury. Past experience indicates that 38% of the samplestaken from near the mouth of a river on which numerous industrialplants...
- Q You work for a pharmaceutical company wanting to make a newflavor of cough syrup. You are asked to conduct research on flavorpreferences. You would like to know whether people like...
- Q You perform 1000 significance tests using a = 0.05. Assumingthat all null hypotheses are true, about how many of the testresults would you expect to be statistically significant? Explainhow you...
- Q Researchers equipped random samples of 46 male and 58 femalestudents from a large university with a small device that secretlyrecords sound for a random 30 seconds during each 12.5-minuteperiod over...
- Q At a certain coffee​ shop, all the customers buy a cup of coffeeand some also buy a doughnut. The shop owner believes that thenumber of cups he sells each day...
- Q (a) Suppose you are given the following (x, y) data pairs. x 1 25 y 4 3 6 Find the least-squares equation for these data (roundedto three digits after the...
- Q In a large population of college-educated adults, the mean IQ is118 with a standard deviation of 20. Suppose 200 adults from thispopulation are randomly selected for a market research campaign.The...
- Q 2. A food processing plant typically contain fungus spores. Ifthe ventilation system is not adequate, this can have a seriouseffect of the health of employees. To determine the amount ofspores...
- Q 6. The assets​ (in billions of​ dollars) of the four wealthiestpeople in a particular country are 39,35,15,14. Assume that samplesof size n=2 are randomly selected with replacement from thispopulation of...
- Q 1. A population of values has a normal distribution withμ=72μ=72 and σ=3.1σ=3.1. You intend to draw a random sample of sizen=154n=154.Find the probability that a single randomly selected value isbetween...
- Q 2. Identify the level of measurement for the following variablesfrom the 2010 General Social Survey data:a. Sex, b. Race, c. Highest educational degree earned,d. Hoursworked per week, and e. Age...
- Q Question 1A university claims that the average cost of books per student,per semester is $300. A group of students believes that the actualmean is higher than this. They take a...
- Q Identify whether each of the situations below is a one-tailedor two-tailed test. Next identify the dependent variable. Thenwrite the research and null hypothesis in symbols (i.e. H1: µ.. . =/>...
- Q 1) For the following data values below, construct a 90%confidence interval if the sample mean is known to be 0.719 and thestandard deviation is 0.366. (Round to the nearest thousandth)(Type...
- Q Problem 2When Alice gets stressed out about her classes, she plays agame in which she rolls a pair of dice and if the sum of the twonumbers is at least...
- Q Identify the independent variable, the dependent variable, andthe unit of analysis in the following hypothesis:a.      Interstate migration in theUnited States lowers state poverty levels.b.     Documented immigrants in theUnited States are...
- Q Please write down all formulas needed to solve and explanationof each formula for Probability, Discrete random variables andtheir distribution, and continuous distribution. ie frompermutation and combination to bayes theorem to...
- Q According to Masterfoods, the company that manufacturesM&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12%are red, 23% are blue, 23% are orange and 15% are green. [Roundyour answers...
- Q An experiment was conducted to study growth characteristics of 8different provenances (regions of natural occurrence) of Gmelinaarborea (a tree native to southern Asia). There are three plotsavailable for planting, so...
- Q Please write in BOLD Thanks :)In Lesson Eight you've learned how to construct confidenceintervals for population parameters and proportions, based on datafrom samples.In a short paragraph, distinguish between Sampling Error...
- Q The manager of a computer retails store is concerned that hissuppliers have been giving him laptop computers with lower thanaverage quality. His research shows that replacement times for themodel laptop...
- Q If a population of college student ages is skewed right, thenthis indicates?
- Q Provide two real-worldsurvey questions that would be useful to you in a professionalapplication or in your everyday life by addressing thefollowing:(i) Your first shouldbe a question associated with a categorical...
- Q USA Today reported that approximately 25% of all stateprison inmates released on parole become repeat offenders while onparole. Suppose the parole board is examining five prisoners up forparole. Let x...
- Q Part 2. As a school nutritionist, you are also interested intracking whether or not children are getting enough calcium intheir diet. It is recommended that teenagers consume at least1,300mg per...
- Q You wish to test the following claim (H1) at a significancelevel of α=0.02.      Ho:μ=52.5      H1:μ<52.5You believe the population is normally distributed, but you do notknow the standard deviation. You obtain the following...
- Q In a study of memory recall, 8 students from a large psychologyclass were selected at random and given 10 min to memorize a listof 20 nonsense words. Each was asked...
- Q A technical engineer is interested in understanding the batterylife of two different laptops for student usage at a communitycollege in California. The two models he has are Madroid andKrapple. He...
- Q Listed below are the top 10 annual salaries​ (in millions of​dollars) of TV personalities. Find the​ range, variance, andstandard deviation for the sample data. Given that these are thetop 10​salaries,...
- Q To prevent E. coli, meat should be cooked to an internaltemperature of at least 160°F. However, different meat pattiescooked for the same amount of time will have different finalinternal temperatures...
- Q 5. A telephone sales solicitor, trying to decide between twoalternative sales pitches, randomly alternated between them duringa day of calls. Using approach A, 20% of 100 calls led to requestsfor...
- Q 4. In order to test whether brand-name printer cartridgesproduce more printed pages, on average, than generic cartridges, aresearch firm has 6 randomly selected printer users use both typesof cartridges and...
- Q Do teachers find their work rewarding and satisfying? An articlein Psychological Reports reported the results of a survey of arandom sample of 395 elementary teachers and 266 high schoolteachers. Of...
- Q In the mid-1990s, Colgate-Palmolivedeveloped a new toothpaste for the U.S. market, Colgate Total, withan antibacterial ingredient that was already being successfullysold overseas. At that time, the word antibacterial was not...
- Q A multiple-choice test has 48 questions, each with four responsechoices. If a student is simply guessing at the answers,1. What is the probability of guessing correctly for anyindividual question?2. On...
- Q You want to test a new instrument for ammonia analysis in fogwater (basic fog is associated with uncontrolled ammonia releasesfrom waste lagoons containing agricultural waste from confinedanimal feedlot operations or...
- Q y.1.01.01.51.52.52.53.53.54.54.54.54.55.55.55.55.55.55.55.55.55.55.56.56.56.56.57.57.57.57.57.57.58.58.59.59.510.010.010.010.0The​ 5-number summary is nothing​, nothing​, nothing​, andnothing.​(Use ascending order. Type integers or decimals. Do not​round.)
- Q PLEASE NUMBER EACH ANSWERStudents will use advanced looping methods includingreplicate(), lapply(), sapply(), and apply(), and access datasetsprovided with R packages in an R script.The function call, rnorm(1), generates a normal...
- Q 25. An important application of regression in manufacturing isthe estimation of cost of production. Based on DATA from AjaxWidgets relating cost (Y) to volume (X), what is the cost ofproducing...
- Q Xander, summer statistics intern in the Superintendent’s Officefor the Palisades Point School District, wonders if the homerunteacher referrals in the 7th grade for two week periodsare comparable. He tests this...
- Q Listed below are measured amounts of caffeine​ (mg per 12oz of​drink) obtained in one can from each of 14 brands. Find the​ range,variance, and standard deviation for the given sample...
- Q Consider the two dependent discrete random variables X and Y .Thevariable X takes values in {−1, 1} while Y takes values in {1, 2,3}. We observe thatP(Y =1|X=−1)=1/6P(Y =2|X=−1)=1/2P(Y =1|X=1)=1/2P(Y...
- Q Please use R or Rstudio for this exercise andshow everything, including the R output. Payattention in everything in Bold, please.\" The quality of Pinot Noir wine is thought to be...
- Q The number of faults over a period of time was collected for asample of 100 data transmission lines. We want to test if the datacome from a Poisson distribution.number of...
- Q 1. A school administrator sends out grade school students tosell boxes of candy to raise funds. Below is a selection of fourstudents and the mean number of boxes they sold...
- Q What is the real difference between between correlation andregression analysis? I see that correlation allows us to examinewhether two variables exhibit some kind of association with eachother. Does correlation mean...
- Q Age at diagnosis for each of 20 patients under treatment formeningitis was given in a research paper. Suppose the ages (inyears) were as follows.1818271923206618211820181820181928161818(a)Calculate the values of the sample mean...
- Q A 2010 Pew Research poll asked 1,306 Americans \"From what you'veread and heard, is there solid evidence that the averagetemperature on earth has been getting warmer over the past fewdecades,...
- Q In Excel, What are some of the functions that can be used tomanipulate text?
- Q A plant manufacturers 12 voltage DC Power Supplies. Twoengineers, Kelsier and Dockson, are given access to a batch of 500power supplies to test. Their tests determine the maximum powerthat the...
- Q A stock analyst wondered whether the mean rate of return of​financial, energy, and utility stocks differed over the past 5years. He obtained a simple random sample of eight companies fromeach...
- Q W74) Please answer in detail with EXCEL Function since Iam learning in EXCEL functionTests with Chi-Square distribution  Variance             A random sample of the number of games played by individual NBAscoring leaders...
- Q Problem 3-05 (Algorithmic) Brandon Lang is a creativeentrepreneur who has developed a novelty soap item called Jackpotto target consumers with a gambling habit. Inside each bar ofJackpot shower soap is...
- Q An online survey asked 397 how much extra in taxes they would bewilling to pay to protect the environment. The sample average was$599 with a sample standard deviation of $180....
- Q Listed below are the lead concentrations in mu​g/g measured indifferent traditional medicines. Use a 0.01 significance level totest the claim that the mean lead concentration for all suchmedicines is less...
- Q 2. (8 pts.) The Centers for Disease Control and Preventionreports that the rate of Chlamydia infections among American womenages 20 to 24 is 2791.5 per 100,000. Take a random sample...
- Q Wire electrical-discharge machining (WEDM) is a process used tomanufacture conductive hard metal components. It uses acontinuously moving wire that serves as an electrode. Coating onthe wire electrode allows for cooling...
- Q Age Group MidpointDiastolic Blood Pressure560763969117413751571177719852178a. Which of these variables - age group or bloodpressure - are the independent and dependentvariables?Independent: Age ?Dependent: Blood Pressure ?b. Find the regression equation which...
- Q Annual high temperatures in a certain location have been trackedfor several years. Let X represent the number of years after 2000and Y the high temperature. Based on the data shown...
- Q For this discussion, you will reflect on the application of thecentral limit theorem to research. Develop a main response in whichyou address the following Summarize the implications of the centrallimit...
- Q The distribution of actual weights of 8-oz chocolate barsproduced by a certain machine is normal with mean 7.7 ounces andstandard deviation 0.15 ounces.(a) What is the probability that the average...
- Q Assume that when adults with smartphones are randomly​ selected,53% use them in meetings or classes. If 13 adult smartphone usersare randomly​ selected, find the probability that fewer than 3 ofthem...
- Q 1) Find the​ z-scores that separate the middle 81​% of thedistribution from the area in the tails of the standard normaldistribution. STEPS ON HOW TO SOLVE IT IN TI832) Assume...
- Q Let's say that my utility function over wealth is LaTeX:U=\ln\left(W\right) U = ln â¡ ( W ) where W is my wealth in dollars.Suppose I currently have $1,000,000 in wealth...
- Q Compare the TF-IDF pivoted normalization formula and Okapiformula analytically.Both formulas are given in the figure above. What are the commonstatistical information about documents and queries that they bothuse? How are...
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