Statistics question and answers for August 26, 2023
- Q 9.9. Is gender independent of education level? A random sampleof people were surveyed andeach person was asked to report the highest education level theyobtained. Perform a hypothesistest. Include all 5...
- Q In polynomial regression, what assumptions underlie the (strict)validity of the various p-values and confidence intervals?
- Q Please note that for all problems in this course, the standardcut-off (alpha) for a test of significance will be .05, and youalways report the exact power unless SPSS output states...
- Q Irena Blazes, the fire chief of Flares, Oregon, wants tointroduce volunteers into the department but fears that employeeswill resist volunteers. Chief Blazes would like to use volunteersand wants to avoid...
- Q A 9 monthold boy is insulin dependent diabetes mellitus (DDM)was seen in a pediatric diabetic clinic in London. He was well andhad no gastrointestical symptoms. He was screened for antibodies.The...
- Q The Graduate Record Examination (GRE) is a test required foradmission to many U.S. graduate schools. Students' scores on thequantitative portion of the GRE follow a normal distribution withmean 150 and...
- Q In each scenario below, specify each variable as a responsevariable, an explanatory variable, or neither. Explain yourchoices.a. A climatologist wishes to predict future monthly rainfall inLos Angeles. To inform his...
- Q Write down and explain in words and/or graphs the five MultipleLinear Regression (MLR) assumptions.
- Q Suppose that 45 studentsare applying to a company. There are 5job openings but 8 offers are made because typically a few studentswill turn down the job. Each student has a...
- Q 3. The time T required to receive a message at node B from nodeA is an exponentially distributed random variable with mean 1/10(milliseconds). The time T is measured from the...
- Q Exxon is developing a new faster pump design. They've narrowedthe development to two design options and are wondering how thepump design might affect daily gas sales (Sales). In a test...
- Q How is statistical software useful?
- Q A research project has been tracking the health and cognitivefunctions of the elderly population in Arizona. The table belowshows the memory test scores from 10 elderly residents, testedfirst when they...
- Q Students of a large university spend an average of $7 a day onlunch. The standard deviation of the expenditure is $2. A simplerandom sample of 25 students is taken. What...
- Q Test the hypothesis using the​ P-value approach. Be sure toverify the requirements of the test. H0: p=0.55 versus H1:p<0.55n=150, x=72, α=0.01Is np01−p0≥10​?NoYes
- Q In this exercise, we examine the effect of combining investmentswith positively correlated risks, negatively correlated risks, anduncorrelated risks. A firm is considering a portfolio of assets.Theportfolio is comprised of two...
- Q Please answer the following questions:Check all outliers of this data of bookcosts(dollars).199530182175384953654143199530182175384953654143noneIn the following data set of candy bag weights(lbs), determinethe z-score of 20.467578571437204682z-score =[three decimal places]A distribution of book...
- Q Please find the percentage for all the questionsbelow.Scores for professional golfers on 18-hole courses arebell-shaped with a mean of 72 strokes and a standard deviation of 5strokes. Using the Empirical...
- Q If Washington state has more cases of hep C reported in 2010,105,800 than OR 79,800. Why is the reported prevalence rate higherin OR (3.05) than WA (2.30) per 100assuming OR...
- Q One of our dealerships has the following average unit sales perteam member. We are concerned that the dealership variance and thepopulation variance are different. We would like to be 95%confident...
- Q 1, The following table contains the number of successes andfailures for three categories of a variable. Test whether theproportions are equal for each category at the α=0.01 level ofsignificance._ Category_1  ...
- Q Suppose that in a simple random sample of 100 people, 69 of thembelieve the Seahawks will win the Superbowl this year. We want todetermine if the proportion of people in...
- Q A local brewery sells their beer in 330 ml bottles. On averagethe beer is filled with 328.1 ml with a standard deviation of 0.9ml. Since it is possible to under-fill...
- Q Resuelva cada uno de los ejercicios de pruebas NOparamétricas:Se han seleccionado aleatoriamente una muestra de 82 estudiantesde Instituto y otra con 46estudiantes de centros privados y se ha considerado la...
- Q Specify sample spaces for the random experiments (a)-(e) andgive mathematical descriptions of the corresponding events. (a)Experiment: A coin is tossed three times. Event: The result of thesecond toss is “headsâ€....
- Q Resuelva cada uno de los ejercicios de pruebas NOparamétricas:Una agencia publicitaria está investigando a qué tipo de avisosle prestan más atención losadolescentes. Se observan a 11 niños, a 6 se...
- Q In a random sample of8​people, the mean commute time to work was35.5minutes and the standard deviation was7.3minutes. A98%confidence interval using the​ t-distribution was calculated tobeleft parenthesis 27.8 comma 43.2 rightparenthesis(27.8,43.2).After...
- Q Suppose we have a binomial experiment in which success isdefined to be a particular quality or attribute that interestsus.(a) Suppose n = 43 andp = 0.36.(For each answer, enter a...
- Q Let X~BIN(40,0.1). Let Y=max(0,x-3). FindE[Y].
- Q 4. You have collected weekly earnings and age data froma sub-sample of 1,744 individuals using the Current PopulationSurvey in a given year.(a) Given the overall mean of $434.49 and a...
- Q Do bonds reduce the overall risk of an investment portfolio? Letx be a random variable representing annual percent returnfor Vanguard Total Stock Index (all stocks). Let y be arandom variable...
- Q 1. Design an experiment to test the hypothesis that students whohave knowledge of the hindsight bias do better on exams thanstudents who have no knowledge of this bias. Be sure...
- Q 6) How many different 5-digits zip codes can we have?A) 100,000 B) 90,000 C) 81,000 D) 80,0007) How many different 5-digits zip codes can we have with nozero as the...
- Q If you wanted to conduct a case-control study to discoverwhether there was a relationship between Parkinson’s disease andhaving worked in a high stress occupation…A. How might you go about selecting...
- Q To test whether extracurricular activity is a good predictor ofcollege success, a college administrator records whether studentsparticipated in extracurricular activities during high school andtheir subsequent college freshman GPA.LEFT side of...
- Q A Bloomberg BusinessWeek subscriber study asked, \"Inthe past 12 months, when traveling for business, what type ofairline ticket did you purchase most often?\" A second questionasked if the type of...
- Q The American Society of PeriAnesthesia Nurses (ASPAN;www.aspan.org) is a national organization serving nurses practicingin ambulatory surgery, preanesthesia, and postanesthesia care. Theorganization consists of the 40 components listed below.State/Region Membership Alabama...
- Q Part #1Allen's hummingbird (Selasphorus sasin) has been studied byzoologist Bill Alther.†Suppose a small group of 13 Allen'shummingbirds has been under study in Arizona. The average weightfor these birds is...
- Q using this modelflog(antibody ratio)jTIME, TREAT, DAYS, FEM, weight, loss,tumor} = TIME + TREATreport a confidence interval for the difference in mean logratio betweenthe BD and NS treatments.Brain41081Liver1456164Time0.5TreatmentBDDay10SexFemaleWeight239Loss5.9Tumor2214428616021710.5BD10Female2254.024610292616019360.5BD10Female224-4.9612592717764110.5BD10Female1849.81684264313511840.5BD10Female2506.01643134217908630.5NS10Female1967.72602281516333860.5NS10Female2000.5271662916187570.5NS10Female2734.03082231515676020.5NS10Female2162.8937796110600573.0BD10Female2672.673731787155813.0BD10Female2631.125761676201453.0BD10Female2280.013312373010684233.0BD9Female2613.4203255697214363.0NS9Female2535.91593380310193523.0NS10Female2340.1264245126677853.0NS10Female2380.834505459610973.0NS9Female2307.01465069012206773.0NS10Female2071.5212846164881524.0BD10Female2543.9155551531688524.0BD10Male256-4.7190488292239524.0BD10Male247-2.8101894548350424.0BD11Female1984.2214379282032324.0NS10Female2372.5224128161598524.0NS10Male2933.1151237342589524.0NS10Male2889.7285310973322424.0NS11Female2365.938035395414272.0BD11Female2514.13918270236472.0BD10Female2234.01535625197972.0BD10Male29812.81647497165972.0BD10Male2607.3364625092872.0NS10Male27211.048411519242372.0NS11Female2262.2168
- Q Week # Revenue Print Ad TV Ad1 $20,000 $ 3,100 $ 4,1002 $22,000 $ 2,600 $ 4,2003 $18,000 $ 2,800 $ 4,5004 $21,000 $ 3,300 $ 4,3005 $20,500 $ 3,100...
- Q Please use Excel and show the formula you used. Thankyou :)A manufacturing process produces connecting rods whosediameter is normally distributed with mean 1.495 cm and standarddeviation .05 cm. In what...
- Q Find the regression equation for the following data setx 143        167 143 189175 174 134 155y             20          80         72         69         44         59         51         63-0.33x + 5.230.33x – 5.230.33x + 5.23cannot be determined
- Q A researcher would like to predict the dependent variable Y fromthe two independent variables X1 and X2 for a sample of N=12subjects. Use multiple linear regression to calculate thecoefficient of...
- Q A researcher would like to predict the dependent variable Y fromthe two independent variables X1 and X2 for a sample of N=16subjects. Use multiple linear regression to calculate thecoefficient of...
- Q Q4) A desk lamp produced by The Luminar Company was found to bedefective (D). There are three factories (A, B, C) where such desklamps are manufactured. A Quality Control Manager...
- Q Dr. Stambaugh hypothesizes that a novel anxiety drug will affectmemory. To examine this, the drug is administered to a randomsample of 23 trained rats. The rats were then placed in...
- Q The following data show the brand, price, and the overall scorefor six stereo headphones that were tested by consumer reports. Theoverall score is based on sound quality and effectiveness ofambient...
- Q 9.3.3A study was conducted that measured the total brain volume (TBV)(in mm3) of patients that had schizophrenia and patients that areconsidered normal. Table #9.3.5 contains the TBV of the normalpatients...
- Q Suppose the life of a particular brand of calculator battery isapproximately normally distributed with a mean of 80 hours and astandard deviation of 9 hours. Complete parts a through c.a....
- Q At the .05 significance level, does the data below showsignificant correlation?xy511.85611.72717.09813.46923.331014.91122.07Yes, significant correlationNo
- Q 1) TRUE OR FALSE: Parameters yield populations2) TRUE OR FALSE: In a study entitled the relationship betweenstudy time and grades, study time is the predictor variable.3) TRUE OR FALSE: Only...
- Q Problem 3-25 (Algorithmic) The College Board National Officerecently reported that in 2011–2012, the 547,038 high schooljuniors who took the ACT achieved a mean score of 540 with astandard deviation of...
- Q A study of identity theft looked at how well consumers protectthemselves from this increasingly prevalent crime. The behaviors of65 college students were compared with the behaviors of 56nonstudents. One of...
- Q 3. A sample of 25 freshmen and senior students at a majoruniversity completed a survey that extent of satisfaction with theparking situation on the campus (the higher the score, the...
- Q Total plasma volume is important in determining the requiredplasma component in blood replacement therapy for a personundergoing surgery. Plasma volume is influenced by the overallhealth and physical activity of an...
- Q Assume that x has a normal distribution with thespecified mean and standard deviation. Find the indicatedprobability. (Enter a number. Round your answer to four decimalplaces.)μ = 22; σ = 3.4P(x...
- Q Here is data with y as the response variable. x y 57.8 47.7 65.342.7 61 30.8 54.5 26.4 -70.7 -338.8 63 45.7 38.9 -46.1 70.2 35.5Make a scatter plot of...
- Q Contrast frequent patterns, associations, and correlations.
- Q Can someone also tell me how to write the commands in excel for1/T and ln(tgel). I have to plot 1/T versus ln(tgel).Cure temp.Gel timeLinearized FormsT(K)tgel(h)1/T(K-1)ln(tgel)373.159.007383.156.200393.154.016403.152.533413.151.711423.151.549433.150.780443.150.619453.150.635463.150.708473.150.549
- Q Given P(A) = 0.6, P(B) = 0.5, P(A | B) = 0.3, do the following.(a) Compute P(A and B).(b) Compute P(A or B).
- Q You are interested in finding a 95% confidence interval for theaverage commute that non-residential students have to theircollege. The data below show the number of commute miles for 12randomly selected...
- Q Computation of z-scores and standardizedscoresYou are a school psychologist and havebeen asked to administer a verbal intelligence test to a localsenior high school English class to assess writing preparedness ofthe...
- Q You are the Director of Purchasing for the WV Department ofEducation. Your agency has plans to privatize the meal service for20 middle schools. Describe your bid specifications and how youwould...
- Q You are interested in finding a 90% confidence interval for theaverage number of days of class that college students miss eachyear. The data below show the number of missed days...
- Q Researchers often use z tests to compare their samples to knownpopulation norms. The Graded Naming Test (GNT) asks respondents toname objects in a set of 30 black-and-white drawings. The test,often...
- Q A fundof 3000$ is to be accumulated by n annual payments of 65 at the endof each year, followed by n annual payments of 135 at the end ofeach year,...
- Q Because not all airline passengers show up for their reservedseats, an airline sells 125 tickets for a flight that holds only120 passengers. The proportion that a passenger does not show...
- Q Certified Behavior Analysts claim that their procedures are moreeffective than any other. Their procedures are clear-cut analyticsthat anyone can learn and apply. It’s not an art they proclaim, buta science....
- Q A researcher is interested in finding a 98% confidence intervalfor the mean number of times per day that college students text.The study included 137 students who averaged 40.7 texts per...
- Q Suppose you play a \"daily number\" lottery game in which threedigits from 0–9 are selected at random, so your probability ofwinning is 1/1000. Also suppose lottery results are independentfrom day...
- Q Question 12A simple random sample of 12 e-readers of a certain type had thefollowing minutes of battery life.287, 311, 262, 392, 313, 263, 293, 316, 286, 301, 287, 291Assume that...
- Q Directions: Complete the assignment. Clearlylabel each answer. Your answers for this assignment must includereasons; simply stating the answer without justification will earnpartial credit. (32points)The gestation period of gray squirrels in...
- Q The following data represent the pH of rain for a random sampleof 12 rain dates. A normal probability plot suggests the data couldcome from a population that is normally distributed....
- Q The Law of Large Numbers is a statistical theory that you readabout in this chapter. In your own words, what does this law sayabout the probability of an event? Perhaps...
- Q In order to estimatethe difference between the MEAN yearly incomes of marketingmanagers in the East and West of the United States, the followinginformation was gathered.EastWestn = 40N = 42X =...
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