Statistics question and answers for July 22, 2023
- Q Question 1)Let's conduct the ANOVA analysis for Charlie's study.Charlie is testing the mean cuteness scores of a sample of dogsby groups. The groups are pugs, other small dogs, medium dogs,...
- Q ​​​​​​​Please post the work so I can understand the process :)Thanks!Telephone calls arrive at the Global Airline reservation officein Louisville according to a Poisson distribution with a mean of1.6 calls...
- Q Suppose the population average amount of dog biscuits in a bagis 40 pounds with a standard deviation of 6 pounds. A simple randomsample of 64 bags is selected. A)What is...
- Q Students will examine and interpret 14 variables from a randomsample of 1450 birth records taken by the North Carolina StateCenter for Health and Environmental Statistics in 2001, andcommunicate the information...
- Q For the next 7 questions, please refer to the followinginformation.Mr. Cherry owns a gas station on a highway in Vermont. In theafternoon hours, there are, on average, 30 cars per...
- Q The effects of mind-altering products (alcohol intake andmedication) on aggressive driving are studied in a group ofindividuals who drink regularly and take prescription medication.Thirty individuals are assigned based on to...
- Q RideShare offers short-term rentals of vehicles that are kept insmall lots in urban neighborhoods with plenty of potentialcustomers. With one lot, it has eight cars. The interarrival timeof potential demand...
- Q An article about the California lottery gave the followinginformation on the age distribution of adults in California: 35%are between 18 and 34 years old, 51% are between 35 and 64...
- Q All euros have a national image on the \"heads\" side and a commondesign on the \"tails\" side. Spinning a coin, unlike tossing it, maynot give heads and tails with equal...
- Q A service station has both self-service and full-serviceislands. On each island, there is a single regular unleaded pumpwith two hoses. Let X denote the number of hoses beingused on the...
- Q The joint probability distribution of the number X ofcars and the number Y of buses per signal cycle at aproposed left-turn lane is displayed in the accompanying jointprobability table.yp(x,y)Â Â Â Â 012x0Â Â Â Â 0.015Â Â Â Â 0.010Â Â Â Â 0.025Â Â 1Â Â Â Â 0.030Â Â Â Â 0.020Â Â Â Â 0.050Â Â 2Â Â Â Â 0.075Â Â Â Â 0.050Â Â Â Â 0.125Â Â 3Â Â Â Â 0.090Â Â Â Â 0.060Â Â Â Â 0.150Â Â 4Â Â Â Â 0.060Â Â Â Â 0.040Â Â Â Â 0.100Â Â 5Â Â Â Â 0.030Â Â Â Â 0.020Â Â Â Â 0.050Â Â (a) What...
- Q With Obesity on the rise, a Doctor wants to see if there is alinear relationship between the Age and Weight and estimating aperson's Systolic Blood Pressure. Using that data, find...
- Q three experiments investigating the relation between need forcognitive closure and persuasion were performed. Part of the studyinvolved administering a need for closure scale to a group ofstudents enrolled in an...
- Q The Gardner Theater, a community playhouse, needs to determinethe lowest-cost production budget for an upcoming show.Specifically, they have to determine which set pieces to constructand which, if any, set pieces...
- Q A researcher states that the time that urban preschool children between 3 and 5 years spend watching television per week has an average of 22.6 hours and a standard deviation...
- Q Because of the pandemic, Wegman’s wants to expedite theirgrocery services by reorganizing so that people do not have tospend as much time in their store each visit. They sample randomcustomers...
- Q Use technology to find the​ P-value for the hypothesis testdescribed below. The claim is that for a smartphone​ carrier's dataspeeds at​ airports, the mean is muμequals=19.0019.00 Mbps. Thesample size is...
- Q You manage a local tex-mex restaurant called “Garage Taco Bar.â€You have recently switched all of your business to takeout due tothe pandemic and you want to make sure you are...
- Q A random sample of 89 tourist in the Chattanooga showed thatthey spent an average of $2,860 (in a week) with a standarddeviation of $126; and a sample of 64 tourists...
- Q Discuss how the concept of statistical independence underliesstatistical hypothesis testing in general. Based on statisticalanalysis, are we justified in asserting that two variables arestatistically dependent? Why or why not? Explain...
- Q 1.You manage a local tex-mex restaurant called “Garage Taco Bar.â€You have recently switched all of your business to takeout due tothe pandemic and you want to make sure you are...
- Q Suppose that the failure rate (failing to detect smoke whensmoke is present) for a brand of smoke detector is 1 in 2000. Forsafety, two of these smoke detector areinstalled in...
- Q Probability and StatisticsCould you please solve the following questions withspecifying the answersA. What is the probability that z, the standardnormal distribution, is less than 1.75 standard deviations belowthe mean of...
- Q Determine the mean and standard deviation of your sample.Find the 80%, 95%, and 99% confidence intervals. Make sure tolist the margin of error for the 80%, 95%, and 99% confidenceinterval.Create...
- Q The Table below shows data of two random samples of employeewages taken from two small business firms providing the sameservice. The issue to be evaluated is whether the average wage...
- Q Mark all pairs of H0/H1 below as valid(V) or invalid (I):H0: p = 0.4 vs.  H1: p >0.4H0: p ≠0.53 vs.  H1: p =0.53H0: σ2 = 15 vs.  H1: σ2...
- Q A real estate agent in Athens used regression analysis toinvestigate the relationship between apartment sales prices and thevarious characteristics of apartments and buildings. The variablescollected from a random sample of...
- Q Probability and StatisticsCould you please solve the following questions withspecifying the answersA. When finding confidence intervals, theinterval is smaller ifa.sample size and standard deviation are biggerb.sample size and standard deviation...
- Q Consider the following hypotheses:H0: μ = 380HA: μ ≠380The population is normally distributed with a population standarddeviation of 77. (You may find it useful to reference theappropriate table: z...
- Q In a survey, 600 consumers were asked whether they would like topurchase a domestic or a foreign made automobile. 340 said thatthey preferred to purchase a domestic made automobile. Constructand...
- Q 1. Twenty male athletes were given a special candy bar daily forseveral weeks, and each man’s body weight was recorded. It is foundthat the mean change in body weight was...
- Q The Nero Match Company sells matchboxes that are supposed tohave an average of 40 matches per box, with σ = 8. Arandom sample of 98 matchboxes shows the average number...
- Q The manufacturer of a sports car claims that the fuel injectionsystem lasts 48 months before it needs to be replaced. A consumergroup tests this claim by surveying a random sample...
- Q Womens HeightsMens Heights5.85.95.66.05.35.95.66.05.76.45.46.15.06.05.36.15.55.45.35.96.26.15.85.95.35.45.55.55.96.35.35.35.55.35.15.64.65.86.15.85.45.55.05.24.95.95.96.85.35.9Women’s HeightsMen’s HeightsSample Mean5.4525.845% Trimmed Mean5.45655.826Median5.45.9Range.5IQR (Interquartile Range).4.5Sample Variance.14343.1425Sample Standard Deviation.37749PART 1The height of women on the basketball team is argued to be 5.5feet tall. Test the data...
- Q 22.)We never conclude that null hypothesis is true.a) Trueb) False23.)When we reject a null hypothesis, we are certain that thealternative hypothesis is true.a) Trueb) False24)If a null hypothesis is rejected...
- Q 1. In a study of children with a particular disorder, parentswere asked to rate their child on a variety of items related to howwell their child performs different tasks. One...
- Q The paper “Effect of Temperature on the pH of Skim Milkâ€(Journal of Dairy Research) reported on a study involving x =temperature (degrees oC) under specified experimentalconditions and y = milk...
- Q Suppose that a certain brand of calculators claims tohave a 7% defect rate.a. If we select 6 calculators at random, what is the probabilitythat two or fewer of them are...
- Q A cell phone company states that the mean cell phone bill of alltheir customers is less than $83. A sample of 19 customers gives asample mean bill of $82.17 and...
- Q explain some distinguishing feature of non parametrictests?
- Q USE R AND SHOW CODES!!1.a. An investigator is interested in comparing thecardiovascular fitness of elite runners on three different trainingcourses. course one is at, course 2 has graded inclines, andcourse...
- Q A. A researcher was interested in comparing the GPAs of studentsat two different colleges. Independent simple random samples of 8students from college A and 13 students from college B yielded...
- Q Suppose that your favorite restaurant serves the best ramendishes in town . Since you eat there so often, you've observed thefollowing :the patrons are 40% male ,the probability that the...
- Q A bag of marbles contains 3 blue marbles, 2 green marbles. 2marbles are selected from the bag without replacement. What is theprobability of getting 1 green marble?
- Q The random variable Y has an exponential distribution withprobability density function (pdf)as follows:f(y) = λe−λy, y >0= 0, otherwise(i) Showing your workings, find P (Y > s|Y > t), for...
- Q For which of the following settings might it be reasonable touse a binomial distribution to describe the random variableX?X is the number of calls received by GE's applianceservice center per...
- Q **Assume that both Plain and Peanut M&M candies are normallydistributed.1. Suppose that M&M claims that their Plain M&Ms have anequal proportion of red and brown.a. Test the claim that the...
- Q As part of an air pollution study, visibility in air wasmeasured in three months at two altitude level.Altitude (m)Visibility in town air (km)JanJunDec013.53.814.3017.23.316.9018.17.221.0014.310.519.7019.59.118.05014.52.816.55017.43.116.85019.14.221.65020.36.519.25018.59.117.0Question11Given that the data neither follow normal distribution...
- Q b) Explain the purposes of the t test and the F test in multipleregression.d) When can we experience autocorrelation in our data and how dowe determine whether there is a...
- Q 1.) 25 Pittsburgh residents were asked how much sleep they getper night. The mean was 7.2 hours and the standard deviation was0.78 hours. Construct and interpret a 90% confidence interval...
- Q The school district recently adopted the use of e-textbooks, andthe superintendent is interested in determining the level ofsatisfaction with e-textbooks among students and if there is arelationship between the level...
- Q A social researcher is interested in understanding the effect ofcollege education on wages. The workers in one group have earned anassociate’s degree while members of the other group hold at...
- Q An engineer designed a valve that will regulate water pressureon an automobile engine. The engineer designed the valve such thatit would produce a mean pressure of 4.3 pounds/square inch. It...
- Q The data are daily high temperatures in Atlanta for onemonth.61, 61, 63, 64, 65, 66, 66, 66, 67, 68, 70, 70, 70, 71, 71, 72,74, 74, 74, 75, 75, 75,...
- Q Let x be a random variable that represents white bloodcell count per cubic milliliter of whole blood. Assume thatx has a distribution that is approximately normal, withmean μ = 6150and...
- Q Find the minimum sample size you should use to assurethat your estimate of  will be within the required marginof error around the population proportion p.Margin of error:  0.027;  confidence level:93%;   is unknown1124                             b.  1123                                    c.  2168                        d.  842Margin of error:  0.025;  confidence...
- Q Find the critical value of t given thefollowing.t0.05 for a t-distribution with 34 degrees offreedom1.691                            b.   2.728                      c.   2.032                       d.   2.441Use the confidence level and sample data to find themargin of error E.Weights of eggs: 90%...
- Q Coal is carried from a mine in West Virginia to a power plant inNew York in hopper cars on a long train. The automatic hopper carloader is set to put...
- Q Here is a data set ( n = 117 )that has been sorted.14.2 21.3 22.5 22.9 23.3 23.8 23.9 24.8 25.1 26.6 26.9 26.9 27.327.4 27.5 27.8 28.2 28.3 28.5...
- Q An exhibitor at an arts and crafts fair sells only 2 types ofproducts – jams and marinades. When a customer enters theexhibitor’s booth, the exhibitor believes that there is aprobability...
- Q Find the indicated Probability.A bank’s loan office uses credit scores in their applicationprocess. The credit scores are normally distributed with a mean of705 and a standard deviation of 55. Applicants...
- Q The lengths (in mm) of a sample of 100 largemouth bass are givenin the file LargemouthBass.csv in Digital appendices. (You can findthis file under the “Digital Appendices†link on Blackboard.)...
- Q Prior to the 1999-2000 season in the NBA, the league madeseveral rule changes designed to increase scoring. The averagenumber of points scored per game in the previous season had been183.2....
- Q A furniture supplier, Acme Chairs, Inc., manufactures a Basicoffice chair and a Deluxe office chair. Each Basic chair costs$25.00 to manufacture, and each Deluxe office chair costs $40.00 tomanufacture. Acme...
- Q In a certain​ area, 34​% of people own a dog. Complete parts aand b below.a. Find the probability that exactly 8 out of 20 randomlyselected people in the area own...
- Q A used car salesperson claims that the probability of he sellinga used car to an individual looking to purchase a used car is 70%and this probability does not vary from...
- Q A poll was taken this year asking college students ifthey considered themselves overweight. A similar poll was taken 5years ago. Five years ago, a sample of 270 students showed that...
- Q The linear model below explores a potential associationbetween property damage and wind speed based on observational datafrom 94 hurricanes that hit the United States between 1950 and2012. The variables areDamage:...
- Q The Downtown Parking Authority of Tampa, Florida, reported thefollowing information for a sample of 220 customers on the numberof hours cars are parked and the amount they are charged. Number...
- Q A one-sample z-test for a population mean is to be performed.Let z 0 denote the observed value of the test statistic, z. Assumethat a two-tailed test is being performed. True...
- Q The null hypothesis for an ANOVA analysis comparing fourtreatment means is rejected. The four sample means are = 10,  = 12, = 15, = 18. The sample size for each...
- Q A random sample of surgical procedures was selected each monthfor 30 consecutive months, and the number of procedures withpost-operative complications was recorded. The data are listed inthe accompanying table.What type...
- Q 1. If the coefficient of determination is 25%, the correlationbetween two continuous variables isa) -5b) 5c) -.25d) .25e) a or bf) none of the above2. To assess the correlation between...
- Q Amount spent# of studentscumulative frequency1 -103311-2071021-3091931-401141-50851-602(a) complete the table to show the cumulative frequency(b) using the scale of 1 cm to represent $5 on the horizontalaxis and 1cm to represent...
- Q Test a hypothesis using variables in the data set for whichANOVA is the appropriate test (do NOT use the variables assignedfor the final project).Data:Gender abusefemale 7.00 Â Â female .00female 7.00male 7.00male...
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