Statistics question and answers for August 06, 2023
- Q a. Tom designed a complete factorial experiment with 2 factors.One factor had 4 levels, the other had 5 levels. For eachcombination of levels of factors, there were 6 replicates. In...
- Q 1. Compare and contrast the independent t-test and the analysisof variance. How are they similar and how are they different. 2.Come up with two hypothetical examples demonstrating this strategyor come...
- Q The value of a sports franchise is directly related to theamount of revenue that a franchise can generate.  Thedata below represents the value in 2017 ($ in millions) and theannual revenue...
- Q A sample of 65 information system managers had an average hourlyincome of $42.75 and a standard deviation of $7.50.a. When the 95% confidence interval has to be developed for theaverage...
- Q A random sample of 45 fresh graduates has a mean startingearnings of $3250. Assume the population standard deviation is$675. Construct a 90% the confidence interval for the populationmean, μ. (Round...
- Q Suppose (?,?) are distributed uniformly inside the quadrilateral? with vertices (0,0), (2,0), (1,1), and (0,1).After deriving the marginal distribution for ?, compute theprobability ?(1/2<?<3/2).
- Q Based on the data shown below, calculate the regression line(each value to two decimal places)y =Â Â x +xy413.72518.65617.38717.41820.44921.971021.51120.631225.161322.291424.821524.65
- Q In one​ community, a random sample of2727foreclosed homes sold for an average of​$440 comma 396440,396with a standard deviation of​$196 comma 981196,981.​a)What assumptions and conditions must be checked before finding aconfidence...
- Q As the following table shows, projections indicate that thepercent of U.S. adults with diabetes could dramaticallyincrease.(a) Find the logarithmic model that best fits the data in thetable, with t as...
- Q What is the purpose of hypothesis testing? Do you see any relevanceto hypothesis testing in your daily life? This could be schoollife, personal life, or work life. Start with work...
- Q There is a river whose average daily flow Q follows a normaldistribution. The average flow is 800 cfs and the standarddeviation is 1000 cfs. Determine the following:(a) The probability that...
- Q whats is Hypothesis testing in a logistic model? and Goodnessof fit for a logistics model?
- Q Assume that a simple random sample has been selected from anormally distributed population and test the given claim. Identifythe null and alternative​ hypotheses, test​ statistic, P-value, andstate the final conclusion...
- Q show your work pleaseYou are the operations manager for American Airlines and you areconsidering a higher fare level for passengers in aisle seats. Youwant to estimate the percentage of passengers...
- Q In the census population density dataset, what are the first,second and third quartiles?1,19,35,43,49,55,56,56,63,67,94,105,110,168,175,181,212,231,239,351,461,595,738,839,9857
- Q Suppose we have a binomial experiment in which successis defined to be a particular quality or attribute that interestsus.(a) Suppose n = 41 andp = 0.33.(For each answer, enter a...
- Q 2. Data set 1: Blood Cholesterol (in mg/dL) Levels of 32Participants at a Community Health Fair180 185 200 198 211 203 199 195210 190 210 200 180 197 188 198187...
- Q Based on a survey of 160 persons employed by the state of NorthCarolina, the mean and standard deviation of their ages are foundto be 36 and 10 years, respectively. Determine...
- Q In a pet shelter for cats only, there were 45 black cats, 30long-haired cats, and 30 cats who were old (> 10 years old). Forthis study, cats in the shelter...
- Q According to Stats Canada, 15% of Canadians in 2015 wereconsidered \"low income\". A researcher believes that number haschanged since that time. A large random sample of Canadians isselected to test...
- Q Assume we flip a fair coin 100 times. Use the normalapproximation to the binomial distribution to approximate theprobability of getting more than 60 heads.Answer: 0.0108 - need work
- Q show your work pleaseIn a study of speed dating conducted at Columbia University, 15female subjects were asked to rate the attractiveness of their maledates, and a sample showed the results...
- Q real estate ads suggest that 67% of homes for sale havegarages, 21% have swimming pools, and 11% have both features.A. what is the probability that a home for sale has...
- Q For all hypothesis tests, you must show the four steps:1. Hypotheses2. Test statistic3. p-value or p-value approximation4. Conclusion sentence (Do no just say â€Reject the nullhypothesis†or â€Fail to reject...
- Q The research director at the Nie Pójdzie Motor Club wasinterested whether the annual miles driven by residents of Arkansaswas greater than the 2019 average of 13,452 annual miles for adriver...
- Q When do we calculate Process capability and implied non-conformancerate.
- Q 1. What type of study is this?2. Based on description of the study, what is (are) thedependent variable(s)?3. Classify the variable(s) you listed in #2 in each of thethree ways.4....
- Q Consider the following randomly arranged in 3 classes data of asample.Classesfrequency5-9910-142515-198Plot the cumulative histogram and the polygon and interpret.(2.5+2.5+2.5=7.5)Determine the Range (5)Determine the mean and the median. (7.5+7.5=15)Determine the standard...
- Q The load-bearing capacities (in thousands of pounds) of fivetransmission line insulators are 64 , 48 , 19, and 79. Use a samplesize of 2 toa). find the mean and standard...
- Q Suppose a developmental psychologist is interested in theeffects of fluoride in water on children’s heights. She measuresthe heights of a random sample (N = 21) of 12-year old children wholive...
- Q A ski company in Vail owns two ski shops, one on the west sideand one on the east side of Vail. Ski hat sales data (in dollars)for a random sample...
- Q The time married men with children spend on child care averages6.4 hours per week {Time, March 12, 2012). You belong lo aprofessional group on family practices that would like to...
- Q a)A sample of 30 patients in a doctor's office showed that theyhad to wait an average of 35 minutes before they could see thedoctor. The sample standard deviation is 9...
- Q 1. A sample of 30 Valencia oranges showed a mean weight of 5.5ounces with a standard deviation of 0.5 ounces. What is the marginof error at 95% confidence?2. A sample...
- Q 14. 8. Read the story below from NPR and then identify the veryimportant concept . How does it relate to correlation andChi-SquareAnalysis Finds Geographic Overlap In Opioid Use And TrumpSupport...
- Q Consider the set of five numbers {0, 2, 4, 6, 8}.1) Make a list of all possible samples of size 2 that can bedrawn from this set of integers. (Sample...
- Q Suppose X and Y are random variables with joint density f(x, y)= c(x2y + y2), − 1 ≤ x ≤ 1, 0 ≤ y ≤ 1 (0else).a) Find c.b) Determine...
- Q a)A university planner wants to determine the proportion ofspring semester students who will attend summer school. Suppose theuniversity would like a 0.90 probability that the sample proportionis within 0.281 or...
- Q If a symmetric coin is tossed 100 times, by using normalapproximation find the probability that:a. it comes up H more than 60 timesb. the number of H(X) is between 60...
- Q Jaqueline and Pedro are running a marathon. Jaqueline's time forfinishing a marathon is uniformly distributed between 150 minutesand 180 minutes. Pedro's time for finishing a marathon is uniformlydistributed between 160...
- Q An important application of regression analysis in accounting isin the estimation of cost. By collecting data on volume and costand using the least squares method to develop an estimatedregression equation...
- Q A psychologist wants to determine whether speaking more than onelanguage fluently has cognitive benefits. They conduct a study inwhich a total of 72 participants are tested on a task measuringcognitive...
- Q AM -vs- PM Test Scores: In my PM section ofstatistics there are 30 students. The scores of Test 1 are given inthe table below. The results are ordered lowest to...
- Q Investigators need to study the impact of the Coronavirusoutbreak. It is of interest to understand how the number ofhospitalizations in a particular state is associated with threepredictors including the number...
- Q (1 point) In a study of red/green color blindness, 550 men and2300 women are randomly selected and tested. Among the men, 47 havered/green color blindness. Among the women, 7 have...
- Q A recent article in a local magazine indicated that the meanselling price of homes in the area is less than $232,000. Can weconclude that the mean selling price in the...
- Q A small regional carrier accepted 18 reservations for aparticular flight with 17 seats. 13 reservations went to regularcustomers who will arrive for the flight. Each of the remainingpassengers will arrive...
- Q The relationship between \"strength\" and \"fineness\" of cottonfibers was the subject of a study that produced the following data.(Give your answers correct to two decimal places.)x, Strength76697176837278748082y, Fineness4.34.74.54.04.14.05.04.94.14.3(a) Draw a...
- Q Consider the following set of data.(18, 15), (31, 55), (63, 27), (82, 24), (109, 58), (118,14)(a) Calculate the covariance of the set of data. (Give your answercorrect to two decimal...
- Q The population (in millions) and the violent crime rate (per1000) were recorded for 10 metropolitan areas. The data are shownin the following table. Do these data provide evidence to rejectthe...
- Q ANOVAPerform/Document 7-step hypothesis testing process forthe following question:Is there significant evidence to suggest that the typeof customer has an effect on the average daily amount of moneyspent? What’s the effect...
- Q The test-retest method is one way of establishing thereliability of a test. The test is administered, and then, at alater date, the same test is re-administered to the sameindividuals. The...
- Q An article presents an analysis of the profit of internationalconstruction projects. In a sample of 126 projects, the averageprofit margin (in percent) was 8.27 with a standard deviation of16.33. A...
- Q 1. Given the following set of exam scores: 58, 53, 56, 68, 60,62, 65, 62, 75, 75, 78, 70, 70, 75, 72, 79, 80, 85, 88, 83, 85, 87,95, 97,...
- Q Let x = boiler steam pressure in 100 lb/ in2and let y = critical sheer strength of boiler plate steeljoints in tons/ in2. We have the following data for aseries...
- Q In a study of the accuracy of fast food​ drive-through orders,Restaurant A had 224 accurate orders and 60 that were not accurate.a. Construct a 95​% confidence interval estimate of the...
- Q A research institute poll asked respondents if they feltvulnerable to identity theft. In the​ poll, n = 990 and x = 538 whosaid​ \"yes.\" Use a 95 % confidence level.
- Q Suppose that 45% of voters favor democracy. Of all voters thatfavor democracy, 42% are male. What is the probability that arandomly selected voter is a male and favors democracy? Please...
- Q A company would like to estimate its total cost equation usingcustomer records.  The company has randomly sampled 28customer records. Each customer record contains a Customer #, theOrder Size, and the Total...
- Q A snack-size bag of M&Ms candies is opened. Inside, thereare 12 red candies, 12 blue, 7 green, 13 brown, 3 orange, and 10yellow. Three candies are pulled from the bag...
- Q Recall lab experiment described in 13.2. The response variableis weight gains (in grams). There are 3 groups of lab animals, eachwith 5 test animals. Data are shown in Table. Complete...
- Q A company would like to estimate its total cost equation usingcustomer records.  The company has randomly sampled 28customer records. Each customer record contains a Customer #, theOrder Size, and the Total...
- Q An accounting firm checks that accuracy of a company’s records,which contains 13 inaccurate accounts out of a total of 50 becauseof time constraints the accounting firm can only audit eight...
- Q A random sample of 24 chemical solutions is obtained, and theirstrengths are measured. The sample mean is 5437.2 and the samplestandard deviation is 376.9.(a) Construct a two-sided 98% confidence interval...
- Q Some researchers in child development wanted to develop ways toincrease the spatial-temporal reasoning of preschool children. Thisability, sometimes referred to as thinking in pictures, isimportant for generating and conceptualizing solutions...
- Q In the dataset airways (see R code), we have the change inairflow from moderate exercise for 19 subjects under 2 differentexposure conditions – regular air (air) and 0.25% sulpher dioxide(so2).a)...
- Q An American Medical Association study showed 20% of allAmericans suffer from high blood pressure. Suppose we randomlysample ten Americans to determine the number in the sample who havehigh blood pressure.What...
- Q Thedistances traveled by individuals to work is exponential, with amean of 9 milesa) What is the probability that they travel between 5 and 11miles?b) What is the 80th percentile of...
- Q Yale Law School says 74% of their students pass the bar exam ontheir first try.To simulate passing students, we could assign the random digitsas:00 to 49 = pass first try,...
- Q 55% of the males in our Spring 2016Stats class out of a sample of 161 males are from South Dakota. 52%of the females out of a sample of 157 are...
- Q Let x be a random variable that represents the weights inkilograms (kg) of healthy adult female deer (does) in December in anational park. Then x has a distribution that is...
- Q Given the following hypothesis: H0 : μ ≤ 10 H1 : μ > 10 For arandom sample of 10 observations, the sample mean was 11 and thesample standard deviation 4.20....
- Q A paper described a survey of 501 undergraduate students at astate university in the southwestern region of the United States.Each student in the sample was classified according to classstanding (freshman,...
- Q Explain why researchers typically focus on statisticalindependence rather than statistical dependence.
- Q Question 4The list of all means you would compute from all possiblesamples you could draw of a given size from a given population iscalled the:Standard Error of the MeanConfidence LevelSampling...
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