Statistics question and answers for July 17, 2023
- Q Pablo randomly picks three marbles from a bag of nine marbles(four red ones, three green ones, and two yellow ones).How many outcomes are there in the event that Pablo picks...
- Q 1.what is a correlation coefficient?2.How is it reported?3. What does it mean with respect to correlation between two ormore variables?
- Q what is meant by independent and dependent variable asit pertains to correlation? Provide an example how do wequantitatively measure the strength of correlation between the twovariables?
- Q In a random sample of 800 men aged 25 to 35 years, 24% said theylive with one or both parents. Construct a 95% confidence intervalfor the proportion of men aged...
- Q The data below provides 71 samples of size 8, collected eachhour, for a particular process.a. Construct an X-bar chart for this process.b. Does the process appear to be in control?...
- Q Using the data, fit an appropriate regression model to determinewhethertime spent studying (hours) is a useful predictor of the chance ofpassing the exam (result, 0=fail 1=pass). Formally assessthe overall fit...
- Q Formally assess whether or not the estimated differences in themean scores (grade) for the three positions (front, middle, andback) are statistically significant,providing numerical justification (test statistic and P-value) foryour conclusion....
- Q In the 1980s, some boxes of Honeycomb cereal contained a digitalwatch. Suppose thatthe probability that a box of Honeycomb cereal has a watch is 0.4,and that the presenceof a watch...
- Q In order to compare the means of two populations, independentrandom samples of 400 observations are selected from eachpopulation, with the results found in the table to the right.Complete parts a...
- Q Biologist in modern days usually use the term “oxygen demand†toexplain the amount of oxygen that is needed by aquatic organism tosurvive life. A group of biological scientist conducted a...
- Q Assume that a manufacturer manufactured 850 items from which 50items do not confirm. Two items are chosen randomly withoutreplacement from the batch.Suppose that therandom variable X equal the number of...
- Q 1. Out of a sample of 100 purchase orders, 10 contain errors.What is the confidence interval for 95% confidence?2. For a 95% confidence level, what is the value n (sample...
- Q A population consists of the following five values: 2, 2, 30, 9,30.a. Not available in Connect.b. By listing all samples of size 3, computethe mean of the distribution of the...
- Q A random sample of professional wrestlers was obtained, and theannual salary (in dollars) for each was recorded. The summarystatistics were x = 45,500 and n = 17. Assume the distribution...
- Q 1) A random sample of the number of hours worked by 40 employeeshas a mean of 29.6 hours worked. Assume the population standarddeviation is 7.9 hours.a. Using a 95% confidence...
- Q In what follows use any of the following tests/procedures:Regression, multiple regression, confidence intervals, one sidedT-test or two sided T-test. All the procedures should be done with5% P-value or 95% confidence...
- Q The College Board provided comparisons of SAT scores based onthe highest level of education attained by the test taker'sparents. A research hypothesis was that students whose parents hadattained a higher...
- Q NOTE :- Please find the probabilities as functions ofcostA service facility charges a $20 fixed fee plus $25 per hour ofservice up to 6 hours, and no additional fee is...
- Q Production volume400450550600700750Total cost400050005400590064007000An important application of regression analysis in accountingis in the estimation of cost. By collecting data on volume and costand using the least squares method to develop an...
- Q give the difference between anova,manova,mancova,pathanalysis,t-test,multiple regression and logisticregressionanswrr only if you know otherwise dislike
- Q Give an example of a stochastic process that is:(a) Both a Markov process and a martingale.(b) A Markov process but not a martingale.(c) A martingale but not a Markov process.(d)...
- Q 1. The following table gives the systolic blood pressure and ageof patients.Systolic Blood PressureAge13134132361223011932123261152313737a) Determine an r value for this data and classify the value asweak, moderate, or strong.b) Based...
- Q Define each of the following definitions concerning data:Statistics, Skewed distribution, Histogram, Outliers, Samplespace and Continuous variable
- Q . A new vaccination is being used in a laboratory experiment toinvestigate whether it is effective. There are 252 subjects in thestudy. Is there sufficient evidence to determine if vaccination...
- Q The finance director at Ubuntu University of Science andTechnology is concerned about the overhead costs at her university.Cost pressures are severe and so controlling and reducing overheadsis very important. The...
- Q a) A sample of 8 observations collected in a regression study ontwo variables, x(independent variable) and y(dependent variable).The sample resulted in the following data.SSR=66, SST=86Calculate an unbiased estimate of the...
- Q Use SPSS, Excel or Minitab software to answer thefollowing questions.Generate normal random data with sample size, n= 40, mean = 20 and standard deviation = 11. Write the generateddata in...
- Q In what follows use any of the following tests/procedures:Regression, multiple regression, confidence intervals, one sidedT-test or two sided T-test. All the procedures should be done with5% P-value or 95% confidence...
- Q 1. A national car rental company is interested in determiningwhether the mean days that customers rent cars is the same betweenthree of its major cities. The following data reflect the...
- Q A total of n different products will be ordered fromm different suppliers,i) Find the probability that a given supplierwill receive exactly k ordersii) Find the probability that one of thesuppliers...
- Q Question 1“PhysicalFun†is a physical center which opens 24 hours per day.Each member of “PhysicalFun†has an access card. Members would becharged in a weekly basic (Sunday 12:00a.m. to Saturday...
- Q In your own words, Differentiate the following statisticalterminology with some examples.a. Population parameter and Sample Statistic.b. Descriptive Statistic and inferential Statistic.C. Nominal Scale and Ordinal Scaled. Primary Data Source and...
- Q Does living together cause divorce? Couples were given astandardized psychological assessment that indicates the likelihoodof divorce (higher scores indicate a higher likelihood of divorce)and asked them how many months they've...
- Q Consider therelationship between the number of bids an item on eBay receivedand the item's selling price. The following is a sample of 5 itemssold through an auction.Price in Dollars109109132139194Number of...
- Q The following datagive the number of hours 10 students spent studying and theircorresponding grades on their midterm exams.Hours Studying00.511.5333.5445.5Midterm Grades63636769717273738189A. Calculate the sumof squared errors (SSE). Use the values b0=61.3521...
- Q Data for a sample of 30 apartments in a particular neighborhoodare provided in the worksheet. You want to see if there is a directrelationship between Size of the Apartment and...
- Q 1. The data below is the city gas mileage for a sampleof hybrid cars, as reported by the Environmental Protection Agencyin 2007.30, 36, 33, 27, 31, 25, 28, 31, 45...
- Q Consider the following experiment: Simultaneously toss a faircoin and, independently, roll a fair die.Write out the 12 outcomes that comprise the sample space forthis experiment.Let X be a random variable...
- Q Given two independent uniform random variables U1 and U2 bothwith parameters [0,1],1) Calculate the probability that 0.3 <= X + Y <= 0.82) Calculate the PDF of X+Y3) Calculate the...
- Q An iceberg consists of frozen freshwater that has broken awayfrom a glacier, and could be more than 15,000 years old. Icebergsin the Grand Banks area are estimated to weigh between...
- Q The Body Mass Index (BMI) is a value calculated based on theweight and the height of an individual. In a small European city, asurvey was conducted one year ago to...
- Q In a college algebra class there are 18 freshman and 17sophomores. Eight of freshman are females and 13 of sophomores aremale. Student is selected at random, probability of selecting afemale?Three...
- Q Let b > 0 be an integer. Find the probability that asymmetric simple random walk started from 0 visits b the first timein the nth step.Hint: Draw a picture, and...
- Q The lengths of pregnancies arenormally distributed with a mean of 272 days and a standarddeviation of 16 days.Find the probability that a pregnancy lasts more than 295days.If we stipulate that...
- Q A random sample of91observations produced a meanx=26.2and a standard deviations=2.6a. Find a​ 95% confidence interval forμ.b. Find a​ 90% confidence interval forμ.c. Find a​ 99% confidence interval forμ.
- Q A study is conducted to assess whether residents in City A spenta different out-of-pocket amount on prescription medications fromresidents in City B last year. The study is restricted to residentswho...
- Q 1) Use either the critical value or p-value method for testinghypotheses.2) Identify the null and alternative hypotheses, test statistic,P-value (or range of P-values), and critical value(s).3) State your final conclusion...
- Q A corporation owns several companies. The strategic planner forthe corporation believes amount spent on advertising can to someextent be a predictor of total sales. As an aid in long termplanning,...
- Q A generic brand of all-purpose fertilizer G claims to contain 10percent phosphorous, a nutrient which helps plants grow strong rootsystems. A leading name brand of all-purpose fertilizer Nadvertises having a...
- Q Biodiesel fuel has a cloud point, the temperature at which thefuel becomes cloudy, of approximately 13 0C .This clouding can lead to poor engine performance and can evencause an engine...
- Q Show your calculations in detail please..Suppose that a researcher is conducting a study on fast foodhabits and assumes that 55% of adults prefer hamburger to pizza. Herandomly selects 10 adults...
- Q In order to compare the satisfaction of customers of 2competitor companies of , 174 customers of company A and 355customers of company B were chosen randomly. Customers wererequired to rate...
- Q Positive behaviors on the normal curve has a mean of 12 and astandard deviation of 3, what are thez-scores andpercentiles for the followingoutcomes?15 positive behaviors18 positive behaviors21 positive behaviors9 positive...
- Q Describe some sampling situations in which a sampler which takesa stratified sample would be necessary.
- Q There are 6 Blue and 6 Red chips in a box. We take 4 chipswithout replacement. The number of taken Blue chips is shown by Xand the number of taken...
- Q a) What is the probability of rolling a 5 with a balanceddie?b) Find the number of ways in which a person can select 3 stocksfrom a list of 5 stocks?c)...
- Q The director of admissions at a large university advises parentsof incoming students about the cost of textbooks during a typicalsemester. He selected a sample of 100 students and recorded theirtextbook...
- Q Think of (and describe) a problem in your work that can beaddressed using a t test for two INDEPENDENT or twoDEPENDENT/CORRELATED samples.Clearly identify the independent and dependent variables. Notethat the...
- Q Questions 8 and 9 are based on the following information:A local retail business wishes to determine if there is adifference in the mean preferred indoor temperature between men andwomen. Assume...
- Q Below is the PSPP analysis for ages (in years) of all 50 headsof households in a small Nova Scotian fishing village. Refer to thePSPP outputs below and answer the related...
- Q You observe the returns Rt (t = 1; 2; :::28) (in %) on yourinvestment for the last 28 days (see the attachedÖle). Follow the steps explained in class to answer...
- Q Consider a possible linear relationship between two variablesthat you would like to explore.1) Define the relationship of interest and a data collectiontechnique.2) Determine the appropriate sample size and collect thedata.3)...
- Q 5, Determine the area under the standard normal curve that liesto the right of ​(a) Z = -0.95 , ​(b) Z=0.53, ​(c)  Z=−0.05, and ​(d) Z =−0.89.​(a) The area to the...
- Q . Assume X ~ N (10, 4).What is the (approximate) distribution of X if thesample size is 100? Briefly discuss the theorem underlying youranswer.What happens to the variance of as...
- Q The length of time it takes a baseball player to swing a bat (inseconds) is a continuous random variable X with probability densityfunction (p.d.f.) f(x) = ( ax + 8/9...
- Q Describe an application of multiple discriminant analysis thatis specific to scientific research or to your academic interests.Explain why this technique is suitable in terms of measurementscale of variables and their...
- Q The world's smallest mammal is the bumblebee bat. The meanweight of 40 randomly selected bumblebee bats is 1.659 grams, witha standard deviation of 0.264 grams.Find a 99.9% confidence interval for...
- Q Describe when you believe it is appropriate to use the followingterms in developing data reports for a healthcare organization:mean, median and mode. Why?
- Q Chapter 6 HomeworkRequired informationExercise 6A-2 Least-Squares Regression [LO6-11][The following information applies to the questionsdisplayed below.]Bargain Rental Car offers rental cars in an off-airport locationnear a major tourist destination in California....
- Q Please note that I tried a screen shot and scanned, andI could not paste this on this site because of the browser will notallow, and I called, and was told...
- Q We know that based on the Binomial distribution, probability ofx successes in n trials when the probability of success is (p) canbe calculated by multiplying Combinations of n items x...
- Q a survey of 2284 adults in a certain large country aged 18 andolder conducted by reputable polling organization founded that 424have donated blood in the past two years. Complete Parts...
- Q The table below gives the age and bone density for five randomlyselected women. Using this data, consider the equation of theregression line, yˆ=b0+b1xy^=b0+b1x, for predicting a woman's bonedensity based on...
- Q Suppose you are trying to determine the number of boxes you needto order to be able to ship the orders from your small businessthis week. You consistently over- or underestimate...
- 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...
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