Statistics question and answers for July 27, 2023
- Q For what type of dependent variable is logistic regressionappropriate? Give an example of such a variable. In what metric arelogistic regression coefficients? What can we do to them to makethem...
- Q Insurance companies are interested in knowing the populationpercent of drivers who always buckle up before riding in a car.They randomly survey 410 drivers and find that 283 claim to alwaysbuckle...
- Q The lifetimes of a certain electronic component are known to benormally distributed with a mean of 1,400 hours and a standarddeviation of 600 hours. For a random sample of 25...
- Q In testing the hypothesis H0:  μ = 800 vs.Ha:  μ ≠800. A sample of size 40 is chosen.the sample mean was found to be 812.5 with a standard deviation of25, then...
- Q A genetic experiment with peas resulted in one sample ofoffspring that consisted of 417 green peas and 153 yellow peas.a. Construct a 90% confidence interval to estimate of thepercentage of...
- Q The Damon family owns a large grape vineyard in western New Yorkalong Lake Erie. The grapevines must be sprayed at the beginning ofthe growing season to protect against various insects...
- Q A study is conducted for students taking a statisticsclass.  Several variables are recorded in thesurvey.  The 300 students were asked what type of car thestudent owns, the number of credit hours taken...
- Q You are working on a research team studying body size ofErissinettes, a newly discovered alien race on the exoplanet Eris.The weirdly adorable Erissinettes have antennae that help theorganisms interact with...
- Q Demonstrate the use of the normal distribution, the standardnormal distribution, and the central limit theorem for calculatingareas under the normal curve and exploring these concepts in reallife applications. Scenario Frank...
- Q Mr. James McWhinney, president of Daniel-James FinancialServices, believes there is a relationship between the number ofclient contacts and the dollar amount of sales. To document thisassertion, Mr. McWhinney gathered the...
- Q A fair coin is flipped four times. What is the probability thattails occurs exactly 4 times if it is known that tails occurs atleast twice
- Q Cantor et al. (1988) reported a study of the relationshipbetween the regular use of hair dye and the development ofleukemia. The study entailed 577 leukemia patients and 1245 personsfree from...
- Q Oxnard Petro, Ltd., has three interdisciplinary projectdevelopment teams that function on an ongoing basis. Team membersrotate from time to time. Every 4 months (three times a year) eachdepartment head rates...
- Q One die is rolled and one marble –yellow, blue, purple, or red is selected at random.-Determine the number of possiblearrangements.-Determine the probability ofobtaining the number 2 and the blue marble.-Determine...
- Q 3) As part of your work for an environmental awareness group,you want to test the claim that the mean amount of lead in the airin U.S. cities is less than...
- Q Algebra scores in a school district are normally distributedwith a mean of 74 and standard deviation 6. A newteaching-and-learning system, intended to increase average scores,is introduced to a random sample...
- Q 5. The following is house price ($ thousands) and annual crimerate in different neighborhoods of a midwestern city 130 150 200230 250 280 300 350 320 200 100 220 95...
- Q     Records of 40 used passenger cars and 40used pickup trucks were randomly sampled to investigate          whetherthere was any significant difference in the mean time in years thatthey were kept by the...
- Q hey, how to solved the question such as \"State which featuresare categorical\". and \"Which are the two most strongly correlatedfeatures? What is the numerical and/or statistical relationshipbetween them?\" for a...
- Q Are you likely to purchase an item promoted by a celebrity on asocial media​ site? According to a​ survey, 26​% of social mediausers have made such a purchase. Complete parts​...
- Q Determine the margin of error for a confidence interval toestimate the population mean with nequals24 and s​ = 13.5 for theconfidence levels below. ​a) 80​% ​b) 90​% ​c) 99​%
- Q Comparing two population proportions.We expect that there is nodifference in proportion of status of employment between male andfemale recent business graduates.a) insert a frequency tableand a bar chart or a...
- Q A random sample of 42 taxpayers claimed an average of ​$9 comma786 in medical expenses for the year. Assume the populationstandard deviation for these deductions was ​$2 comma 387.Construct confidence...
- Q You are considering the risk-return of two mutual funds forinvestment. The relatively risky fund promises an expected returnof 14.7% with a standard of 15.6%. The relatively less risky fundpromises an...
- Q Question 3)The final grades in Math class of 80 students atState University are recorded in the accompanying table.53626873757882885762687375788389596368737578849060636974767885936065717476798593606571757679859461657175767986956166727577808795626772757781889562677375788288mA.The given data set is in ascending order. If class intervalsize is 3...
- Q A college football coach was interested in whether the college’sstrength development class increased hisplayers’ maximum lift (in pounds) on the bench pressexercise.  He asked four of his players toparticipatein the study.  The...
- Q Following is the average amount of money left to children by thetooth fairy in recent years, according to a  poll of parents.  The table compares these payoutamounts to the U.S. unemployment rate...
- Q 1) Use these two confidence intervals to answer the question.90%: (0.770, 0.808) and 99%: (0.759, 0.818)If H_0: pi = .81 and H_a: pi not equal to .81, do we reject...
- Q of the three men, the chances that of politician, a businessman,of an academician will be appointed as a vice-chancellor (vc) of auniversity are 0.5,0.3 and 0.2 respectively. Probability that theresearch...
- Q For each data set below, find the following: a) The 5 NumberSummary; b) The IQR c) The “Outlier Fencesâ€; d) List any outlierse) Sketch the box plot45,70,71,73,75,80,81,85,100
- Q Stet by step in R and attach R file and R codes too -ThanksUse one of the real-world example data sets from R (notpreviously used in the R practice assignment)...
- Q Engineers are testing company fleet vehicle fuel economy (milesper gallon) performance by using different types of fuel. Onevehicle of each size is tested. Does this sample provide sufficientevidence to conclude...
- Q           Atutoring center collected data on the number of student visitsduring each of the first eight weeks of the          falland spring semesters.  The results are givenbelow.  (Assume that the paired sample data aresimple          randomsamples and...
- Q Given that x is a normal variable with mean μ = 108 and standarddeviation σ = 14, find the following probabilities. (Round youranswers to four decimal places.) (a) P(x ≤...
- Q 33) All manufactured devices and machines fail to work sooneror later. Suppose that the failure rate is constant and the time tofailure (in hours) is an exponential r.v. X with...
- Q A watch manufacturer believes that 60% of men over age 50 wearwatches. So, the manufacturer took a simple random sample of 275men over age 50 and 170 of those men...
- Q According to the Center for Disease Control (CDC),76 millionpeople in the US get diarrhea and upset stomachs each year. Most ofthese infections can be prevented by regularly washing one’s hands.A...
- Q conduct AOV test. find ss, df, MS, F,PLensSupplier123456789A189.9191.9190.9183.8185.5190.9192.8188.4189.0B156.6158.4157.7154.1152.3161.5158.1150.9156.9C218.6208.4187.1199.5202.0211.1197.6204.4206.8
- Q ScenarioCertified Behavior Analysts claim that their procedures are moreeffective than any other.  Their procedures are clear-cutanalytics that anyone can learn and apply. It’s not an art theyproclaim, but a science.  You decide...
- Q Currently, among the 20 individuals of a population, 2 have acertain infection that spreads as follows: Contacts between twomembers of the population occur in accordance with a Poissonprocess having rate...
- Q It is estimated that 4.5% of the general population will livepast their 90th birthday. Suppose a random sample of 753 highschool seniors is selected.a. Describe the sampling distribution of ?Ì‚.b....
- Q A company randomlychose 200 US households and found that in 120 of them, the womenmade the majority of the purchasing decisions. We want to know thepopulation proportion of US housholds...
- Q The National Sleep Foundation surveyed representative samples ofadults in six different countries to ask questions about sleepinghabits.†Each person in a representative sample of 250 adults ineach of these countries...
- Q #40The quantity of dissolved oxygen is a measure of water pollutionin lakes, rivers, and streams. Water samples were taken at fourdifferent locations in a river in an effort to determine...
- Q Class data (hours on electronics) are below.. please use datafto answer question...1. A national survey conducted by Common Sense Media in early2017 found that the average amount of time in...
- Q We wish to estimate what percent of adult residents in a certaincounty are parents. Out of 100 adult residents sampled, 74 hadkids. Based on this, construct a 99% confidence interval...
- Q A survey of mining companies is to be conducted to estimate p,the proportion of companies that anticipate hiring engineers duringthe coming year. (a) How large a sample isrequired to estimate...
- Q Currently students have several popular fast food options (e.g.Chick fil A, Wendy’s, Papa Johns, Au Bon Pain), cafeterias (Muse,Dalton), and take out (Hisso Sushi,Pinkberry).  Currently Chartwell Food Services is thelicensed operator...
- Q 5.California and Washington state both started reporting COVID-19cases at approximately the same time. Suppose a researcher wants tostudy the fatality rate of diagnosed COVID-19 cases in the 2states.a. What null...
- Q A process has a Cpk = 1.35 and is centered between thespecification limits. (a) What is the DPM of the process? (b) Ifthe mean of the process increases by 1.5σ...
- Q A researcher has boiled her hypothesis test down to thefollowing information.H0: p=0.7, Ha: p<0.7, α=0.02 x=117, n=172Find the p-value.
- Q Career Training According to the study The American Freshman:National Norms 2015, 76.1% of college freshmen said that “to gettraining for a specific career†was a very important reason fortheir going...
- Q 3.a. A researcher wants to study how long (in days) patients aged30-39 who are admitted to a hospital for coronavirus treatmentspend in the hospital before being discharged. Preliminary datasuggests that?...
- Q Text exercise 39 page 638. This question uses the same data asexercise 2 above, and the data is in the accompanyingspreadsheet.(a) Estimate the regression in Excel and report the regressionline.                                  [2pts](b)...
- 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 Provide all relevant Minitab output, and make sure the responsesare organized and are clearly written.Suppose an investigator is interested in the weight (pounds) ofa certain type of fish. They collect...
- Q x1x23.053.129.284.027.094.18.522.762.272.485.573.214.511.296.93.894.332.756.043.981. Use z-scores to standardize the values, and thencalculate the Euclidean distance between the first twoobservations.2.  Use the min-max transformation to normalize thevalues, and then calculate the Euclidean distance between the...
- Q Use the following information to answer the next fiveexercises: A poll of 1,200 voters asked what the mostsignificant issue was in the upcoming election. Sixty-five percentanswered the economy. We are...
- Q 1/Suppose that about 84% of graduating students attend theirgraduation. A group of 37 students is randomly chosen, and let X bethe number of students who attended their graduation.Please show the...
- Q You are competing for a contract in a second-price auction. Thecost for you to fulfill the contract is $10m. Check if each of thefollowing statements is true. If not, change...
- Q Let x be the age in years of a licensed automobiledriver. Let y be the percentage of all fatal accidents(for a given age) due to speeding. For example, the first...
- Q You may need to use the appropriate appendix table or technologyto answer this question.The increasing annual cost (including tuition, room, board,books, and fees) to attend college has been widely discussed(Time.com)....
- Q (All answers were generated using 1,000 trials and native Excelfunctionality.)The Iowa Energy are scheduled to play against the Maine RedClaws in an upcoming game in the National Basketball Association(NBA) G...
- 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 Research in the gaming industry showed that 8% of all slot machinesin the United States stop working each year. Short’s Game Arcadehas 70 slot machines and only 5 failed last...
- Q What is the would be the null and alternative hypothesis for thefollowing seed germination findings. The research question is basedon ffects of salinity on seed germination is an understanding ofthe...
- Q Two major automobile manufacturers have produced compact carswith the same size engines. We are interested in determiningwhether or not there is a significant difference in the MPG (milesper gallon) of...
- Q Confidence Intervals for Population Means When the PopulationStandard Deviation is Unknown.Use the table of critical values of t to find the following:Construct a confidence interval for the population mean at...
- Q Unless you have sufficient evidence otherwise, you must assumethat:Group of answer choicesboth the null and alternative hypotheses are truethe alternative hypothesis is trueneither the null nor alternative hypotheses are truethe...
- Q Answer the folloing…Drug TestingA company has 20,000 employees to drug test. We are going toassume there are 500 actively using illegal drugs. The drug testthey are going to administer is...
- Q In inventory control the engineer is faced with the followingdilemma. If she keeps too much inventory, it results in high costs.On the other hand, if she keeps too few items,...
- Q 1. In your own words, what is one-way analysis of variance usedfor?2. In your own words, what is the main difference betweenone-way analysis of variance and two-way analysis of variance
- Q What is the p value for the dataset below? determine whether asignificant difference exists among groups A, B, and C? Use theformat 0.999.Chemical AChemical BChemical C112121841031259698981051221008913095102107122981051211051201158910012810012413090Referring to the results from...
- Q A company produces steel rods. The lengths of the steel rods arenormally distributed with a mean of 119.7-cm and a standarddeviation of 2-cm. For shipment, 30 steel rods are bundledtogether.Find...
- Q Please type out answers.A recent survey showed that in a sample of 100 elementary schoolteachers, 15 were single. In a sample of 180 high school teachers,36 were single. Is the...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!