Statistics question and answers for August 09, 2023
- Q An engineer has designed a valve that will regulate waterpressure on an automobile engine. The valve was tested on 130engines and the mean pressure was 7.6 lbs/square inch. Assume thestandard...
- Q Which of the following is the complete definition of the simplelinear regression model?
- Q Find the p-value as a range using Appendix D.(Round your left-tailedtest answers to 3 decimal places and other valuesto 2 decimal places.)p-value(a) Right-tailed testt = 1.457, d.f. = 14between  and(b) Two-tailed...
- Q It may be that sunshine has a unique effect on learningstatistics. Previous research has been in disagreement, with somestudies showing that sunshine increases amount learned whereasothers show sunshine has detrimental...
- Q Below is the data for a personality questionnaire measuringconscientiousness. These data were taken from a random sample of 25undergraduate psychology majors. In the general population, scoreson this questionnaire are normally...
- Q Women athletes at the a certain university have a long-termgraduation rate of 67%. Over the past several years, a randomsample of 40 women athletes at the school showed that 22...
- Q Chapter 11 Estimation and Confidence Intervals - Pleaseanswer 2-4Practice 2) Estimation for the one-sample tTestIn chapter 9, we computed a one-sample t test examining thesocial functioning of relatives of individuals...
- Q A dept. Store marketing study claims 40% of customers preferCalvin Klein, 30% prefer Tommy Hilfiger, 20% prefer Ralph Laurenand 10% prefer other. A survey of 500 customers finds thefollowing: 175...
- Q A factory has in it five machines, A, B, C, D, and E thatproduce Smart Pencils.Machine A produces 5 % of the factory's output with a 2 %defective rate.Machine B...
- Q Determine the minimum sample size required when you want to be90​% confident that the sample mean is within one unit of thepopulation mean and sigma=10.8. Assume the population is normallydistributed.You...
- Q An educational psychologist studies the effect of frequenttesting on retention of class material. In one section of anintroductory course, students are given quizzes each week. A secondsection of the same...
- Q Could you please give me step-by-step on how to solvethis. Thank you!I believe that the population proportion for 50% of the peoplewho live in my neighborhood drive a mini van....
- Q QUESTION 11A pharmacologist decided to test two common headache-tablets fortheir effectiveness: Tablet A 500mg and Tablet B 20 mg. Theexperiment was conducted as follows: A random patient that walkedinto the...
- Q Determine P(Z<-1.85). Report your answer to four decimalplaces.
- Q Government standards limit the airborne amount of a knowncancer causing gas. A company using a known cancer causing gas inits production process limits the exposure of its employees to thegas...
- Q The values of y and their corresponding values of y are shown inthe table belowx23446y23546A) Calculate the coefficient of correlation;B) Calculate the coefficient of determination;C) Obtain the regression coefficients and...
- Q The table below shows the number of students absent on theparticular day of the week:DayMTuWThFNumber11180859499Test if the distribution of students absent is uniform throughthe week with the significance level of...
- Q During the COVID-19 pandemic, the hospital emergency departmentat a very busy hospital receives, on average, one patient every25.1 minutes. The standard deviation of inter-arrival time betweentwo consecutive patients is 9.8...
- Q 1. A state’s Division of Motor Vehicles (DMV) claims that 60% ofall teens pass their driving test on thefirst attempt. An investigative reporter examines an SRS of the DMVrecords for...
- Q The following table shows the number of full-time faculty thatWVU has on staff throughout the years.Year# ofFaculty200312302007130020091440201314702017153020181630(A) Find the equation of the regression line that represents thenumber of full-time faculty,...
- Q Given the following pmf f(x,y), calculate mx,my, sx, sy, sxy,pxy, andE[2.5x2-10y3-8x3y2+3]x2 is the same as x^2, and x3 is  x^3,y2 is y^2Yf(x,y)0134X20.10.050.030.0540.010.050.10.1580.010.060.190.2
- Q When survey data indicated that a company needed to improve its​package-sealing process, an experiment was conducted to determinethe factors in the​ bag-sealing equipment that might be affectingthe ease of opening...
- Q Suppose we take a poll (random sample) of 3907 studentsclassified as Juniors and find that 2904 of them believe that theywill find a job immediately after graduation.What is the 99%...
- Q The following are the grades of 27 students in a statisticsexam: 20 28 42 51 54 55 56 57 9 61 62 63 64 65 67 68 69 71 74...
- Q SHOW WORK!!!!! Full credit will not be givenfor answers only. NOTE: for any question asking you to determine aprobability----you MUST write out a probability statement usingproper notation!!!! Probabilities should be...
- Q [20 pts] In a random poll taken in 2008, Gallup asked 1010national adults whether they were baseball fans. 570 of the samplesaid they were. Construct a 96% confidence interval to...
- Q Kellie a developmental psychologist measured the number oferrors twenty teenagers made in a driving simulator while talkingon their cellphones.Here are the data [1, 2, 5, 2, 1, 3, 1, 4,...
- Q . Consider the 68 words in thefollowing two sentences to be modeled as random variables. Thesentences contain words of 1 letter length to 10 letter length.Thus random variable x lies...
- Q The following lists two variables taken from a survey of recentcollege graduates: Cumulative First year’s salary College GPA (in1,000’s) Joe 3.1 28 Suzy 2.5 22 Catherine 3.6 29 Simon 2.8...
- Q The Thomas Supply Company Inc. is a distributor of gas-poweredgenerators. As with any business, the length of time customers taketo pay their invoices is important. Listed below, arranged fromsmallest to...
- Q 1.perform Levene’s test for equal variance. Note, this is aoneâ€way ANOVA testing for the equality of 16 variances (eachcombination of promotion/discount). 0.1 signigicance2. perform 2-way anova with replicationTo answer these...
- 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 5.95.9 pounds/square inch. Itis...
- Q Hi I had question about finding the critical values of anindependent, ,random, two sample test( assuming equality ofvariances)The question:Philosophical and health issues are prompting an increasingnumber of Taiwanese to switch...
- Q Evaluate the data provided in thetable below.42.461.477.464.245.354.365.773.154.772.656.35429.877.357.161.443.373.158.748.542.66457.481.352.1a) Test the hypothesis that thepopulation mean is equal to 55, compared to the mean is not equalto 55 if alpha is 0.10.b) Find...
- Q A coin is flipped 34 times and heads is observed 22 times.Assuming this proportion is normal for this particular​ coin, ifthe coin is flipped 50​ times, what is the probability...
- Q The mean height of women in a country​ (ages20minus−​29)is64.3inches. A random sample of65women in this age group is selected. What is the probabilitythat the mean height for the sample is...
- Q A data set is givena)(a) Draw a scatter diagram. Comment on the type of relation thatappears to exist between x and y.​(b) Given thatx overbarxequals=3.83333.8333​,s Subscript xsxequals=2.40142.4014​,y overbaryequals=3.98333.9833​,s Subscript ysyequals=1.74521.7452​,andrequals=negative...
- Q A particular fruit's weights are normally distributed, with amean of 520 grams and a standard deviation of 40 grams.If you pick 27 fruits at random, then 11% of the time,...
- Q Use duality to answer the following application.Oz makes lion food out of giraffe and gazelle meat.Giraffe meat has 18 grams of protein and 36 grams of fat per pound,while gazelle...
- Q 1) Imagine you are explaining to your friend how Type I and TypeII errors work. You friend then asks you, “Why don’t researchersjust set the alpha error rate really low...
- Q Audrey and Diana go fishing at the Lyndon FishingPond. Upon arrival the owner informs them that the pond is stockedwith an infinite number of independent fish, and that a...
- Q The incubation time for a breed of chicks is normallydistributed with a mean of 24 days and standard deviation ofapproximately 3 days. Look at the figure below and answer thefollowing...
- Q An online retailer ships products from overseas with anadvertised delivery date within 10 days. To test whether or notdeliveries are made within the advertised time, a random sample of36 orders...
- Q A study of the effect of television commercials on 12-year-oldchildren measured their attention span, in seconds. The commercialswere for clothes, food, and toys.ClothesFoodToys2249502033534838423551552847633142531734483143582057474751445154Complete the ANOVA table. Use 0.05 significance level.(Round...
- Q The owner of Showtime Movie Theaters, Inc., would like topredict weekly gross revenue as a function of advertisingexpenditures. Historical data for a sample of eight weeksfollow.WeeklyGrossRevenue($1,000s)TelevisionAdvertising($1,000s)NewspaperAdvertising($1,000s)965.01.5902.02.0954.01.5922.52.5953.03.3943.52.3942.54.2943.02.5(a)Develop an estimated regression equation...
- Q Wildlife biologists inspect 150 deer taken by hunters and find26 of them carrying ticks that test positive for Lyme disease.a.) Create a​ 90% confidence interval for the percentage of deerthat...
- Q A poll of 1021 U.S. adults split the sample into four age​groups: ages​ 18-29, 30-49,​ 50-64, and​ 65+. In the youngest age​group, 60​% said that they thought the U.S. was...
- Q When only two treatments are involved, ANOVA and the Student’st test (Chapter 11) result in the same conclusions. Also,for computed test statistics, t2 =F. To demonstrate this relationship, use the...
- Q Each of three supermarket chains in the Denver area claims tohave the lowest overall prices. As part of an investigative studyon supermarket advertising, a local television station conducted astudy by...
- Q Suppose 400 students take an exam and the distribution of theirscores can be treated as normal. Find the number of scores fallinginto each of the following ranges:(a)Â Â Â Within 1 standarddeviation of...
- Q How do women fare in comparison with men in reaching managerialpositions in department store retailing? A sampling of 321 retaildepartment store chains may help to answer this question. Theaccompanying table...
- Q We have a lot of data and information. If you want toforecast something, find data for it from the library. Let us callthis data Dependent variable . Also find data...
- Q Chapin Manufacturing Company operates 24 hours a day, five daysa week. The workers rotate shifts each week. Management isinterested in whether there is a difference in the number of unitsproduced...
- Q Do owners of SUVs put more mils on their vehicles in a week thando owners of cars? To answer this question, the following data wascollected.Miles driven per weekSUVCar900115054017512003553001508506007006003503006292752802854004004203506756002497003006004004003502503551175300350500Using α =...
- Q 0ft10ft30ft40ft0.0450.0450.0440.0980.0430.0310.0440.0740.040.0430.0480.154The dataset contains measurements of iron levels at severaldepths in a bay. Develop your hypotheses and at .05 significancelevel conduct the appropriate statistical test to determine if ironlevels are different...
- Q Five different environments were chosen to compare the seedyield of four strains of a weed species. In each environment, fouradjacent plots of approximately same fertility and moisture levelwere found and...
- Q Suppose that there are 27 matches originally on the table, andyou are challenged by your dinner partner to play this game. Eachplayer must pick up either 1, 2, 3, or...
- Q a) What is the probability that a 5-card poker hand has at leastthree spades?(b)What upper bound does Markov’s Theorem give for thisprobability?(c)What upper bound does Chebyshev’s Theorem give for thisprobability?the...
- Q Suppose you needed totest the claim that the two samples described below come frompopulations with the same mean. Assume that the samples areindependent simple random samples.Sample 1: n1=17, x¯¯¯1=24.7,s1=3.05n1=17, x¯1=24.7,...
- Q The price of a three-month future contract on the S&P 500index is traded at 2355. Use a 9 step binomial tree model to valuean American put on the future contract...
- Q Suppose a batch of metal shafts produced in a manufacturingcompany have a variance of 6.25 and a mean diameter of 206inches.If 90 shafts are sampled at random from the batch,...
- Q I am stumped on these problems and homework question, pleasecould I get the answers to the questions below from an expert.Thank you5). Suppose that two population proportions are being comparedto...
- Q A data set lists earthquake depths. The summary statistics aren=500 x =6.35 ​km, s=4.12 km. Use a 0.01 significance level to testthe claim of a seismologist that these earthquakes are...
- Q DATA: GradesA- 10 Â Â Â B- 2 Â Â Â C- 1 D- 0Â Â F- 2Q23. a) If a committee with 2 student members is to be formed,what is the probability of forming a...
- Q 1. Of 12 possible books, you plan to take 4 with you onvacation. How many different collections of 4 books can youtake?2. There are 14 standbys who hope to get...
- Q What percentage of respondents is contacted typically duringdata validation?Group of answer choices10%15%25%33%40%A researcher should consider answers to all of the followingquestions except _____ when selecting a particular test ofsignificance.Group of...
- Q Test the four lists attached to see if there is a differencebetween the means or not, then answer the following.Test Statistic =p-value =Decision =Use alpha = 0.05.The four lists come...
- Q Copy and paste, or type, the following into cells A1:D5 of anExcel spreadsheet:Input datafixed cost16,000Units1,050variable cost per unit4.75revenue=D2*B4sell price per unit6.5expenses=B2+(B3*D2)profit=D3-D4Use Excel's Goal Seek to answer the following question. Assumingthat...
- Q If A and B are independent events, P(A)=0.10, and P(B)=0.66,what is P(B|A)?
- Q   An education researcher is interested in students’performance on a mathematics test for a novel---and generallyunfamiliar---concept. The researcher believes that if studentsparticipate in an extracurricular training session, then they willbe...
- Q An education researcher is interested in students’ motivation tostudy local history. The researcher believes that if studentsexperience a particular form of positive coaching, then they willbe more likely to show...
- Q A 10-year study conducted by the American Heart Associationprovided data on how age, systolic blood pressure relate to therisk of strokes. Data from a portion of this study follow. Risk...
- Q Fund NameFund TypeNet Asset Value ($)5 Year Average Return (%)Expense Ratio (%)Morningstar RankAmer Cent Inc & Growth InvDE28.8812.390.672-StarAmerican Century Intl. DiscIE14.3730.531.413-StarAmerican Century Tax-Free BondFI10.733.340.494-StarAmerican Century UltraDE24.9410.880.993-StarArielDE46.3911.321.032-StarArtisan Intl ValIE25.5224.951.233-StarArtisan Small CapDE16.9215.671.183-StarBaron...
- Q ONLY ANSWER PART C, D AND E1A. Suppose The lifetime for a competing brands of tires areindependent of each other and approximately normal with unknownmeans but known variancesσ^2= 975 miles^2...
- Q True or False. For samples with fewer individuals, it is astandard practice to use the t score value in place of a z scorevalue when calculating a confidence interval at...
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!