Statistics question and answers for August 17, 2023
- Q Asurvey found that women’s heights are normally distributed withmean 63.5 in. and standard deviation 2.9 in. The survey also foundthat men’s heights are normally distributed with mean 67.2 in. andstandard...
- Q How would you use confidence intervals in your daily life?
- Q I ONLY NEED PART D Thank youA global research study found that the majority of​ today'sworking women would prefer a better​ work-life balance to anincreased salary. One of the most...
- Q Twenty economist were chosen randomly, and asked to predict ifthe national economy would improve during the next 12 months.Eleven of the economists predicted an increase, and nine economistspredicted a decrease...
- Q According to an article, “only 1 in 5 American women believethat the heart disease is her greatest health threat.†A sample of50 women is taken where 8 of them stated...
- Q How would you use Describing Data: Numerical Measures inyour daily routine?
- Q X ~ ( Mean, 2.15) ( Suppose we do not have information of Meanof the population) Question1-----------------------------------------------------------------------------Use calculator go to math---> PRB-------> random sample 1. *Pick one (only-one) sample size...
- Q Are low-fat diets or low-carb diets more effective for weightloss? A sample of 70 subjects went on a low-carb At the end of thattime, the sample mean weight loss was...
- Q (1) Many people consider their smart phone to be essential!Communication, news, Internet, entertainment, photos, and justkeeping current are all conveniently possible with a smart phone.However, the battery better be charged...
- Q 7. The following data represent the number of workdays absentduring the past year, y, and the number of years employed by thecompany x, for seven employees randomly selected from a...
- Q - Assume that the variable Z is distributed as a standardizednormal with a mean of 0 and a standard deviation of 1. Calculatethe following:a. Pr (Z > 1.06)b. Pr (Z...
- 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 Directions Use the Chi-Square option in the Nonparametric Testsmenu to answer the questions based on the following scenario.(Assume a level of significance of .05 and use information from thescenario to...
- Q A genetic experiment with peas resulted in one sample ofoffspring that consisted of 441green peas and 166 yellow peas.a. Construct a 95​% confidence interval to estimate of thepercentage of yellow...
- Q Construct a scattergram for each data set. Then calculate r andr2 for each data set. Interpret their values. Complete parts athrough d.a.x−10123y−30145Calculate r.r=. 9853.​(Round to four decimal places as​ needed.)Calculate...
- Q the accompanying data represent the miles per gallonof a random sample of cars with a​ three-cylinder, 1.0 literengine. ​(a) compute the​ z-score corresponding to the individualwho obtained 38.7 miles per...
- Q To study how social media may influence the products consumers​buy, researchers collected the opening weekend box office revenue​(in millions of​ dollars) for 23 recent movies and the social mediamessage rate​(average...
- Q 9.16 A bottled water distributor wants to determine whether themean amount of water contained in 1-gallon bottles purchased from anationally known water bottling company is actually 1gallon. You know from...
- Q A. An union representing the Bottle Blowers of America (BBA) isconsidering a proposal to merge with the Teamsters Union. Accordingto BBA bylaws, at least three-fourths of the union membership mustapprove...
- Q . At a large factory, the employees were surveyed and classifiedaccording to their level of education and whether they smoked. Thedata are shown in the table below:smoking habitnot high school...
- Q The accompanying data represent the total compensation for 12randomly selected chief executive officers​ (CEOs) and the​company's stock performance.Company  Compensation  ReturnA  14.98  74.48B  4.61  63.62C  6.15  148.21D  1.11  30.35E  1.54  11.94F  ...
- Q ou are going to calculate a 95% confidence interval for aone-sample proportion. Which of the following would be yourcritical value (z*)?
- Q I drive to school and am currently looking for a parking spot soI can walk to Jacob's. If I turn into a parking lot to look for aspot to park...
- Q 20. Jogger A can run laps at the rate of 2 minutes per lap.Jogger B can run laps on the same track at the rate of 150 secondsper lap. If...
- Q (a) Briefly discuss the binomial probability distribution.(b) A coin is flipped 12 times: what is the probability ofgetting:i. no heads; and)ii. no more than 3 heads?Over the past 10 years...
- Q What are some risk for getting off topic when you are researchingfor and writing an argumentative essay
- Q The average length of time customers spent on waiting at ABCStore’s check-out counter before a new P.O.S. system was installedwas 4.3 minutes. A sample of 40 customers randomly selected at...
- Q Scenario 3:To determine the effectiveness of a new diuretic drug, urineoutput was measured in 20 men and compared to 20 men that receivedplacebo control. The data are summarized in Table...
- Q (1 point) A poll is taken in which 388 out of 600 randomlyselected voters indicated their preference for a certaincandidate.(a) Find a 99% confidence interval for p (.......≤p≤........)(b) Find the...
- Q Find the level of a two-sided confidence interval that is basedon the given value of t and the given sample size.6. t = 1.943, sample size n = 7. (Multiple...
- Q Q1: A transportcompany wants to compare the fuel efficiencies of the two types oflorry it operates. It obtains data from samples of the two types oflorry, with the following results:TypeAverage...
- Q The weekly demand for Papa’s pizzas on a Friday night is anormally distributed random variable with mean 222 and standarddeviation 8. Show your work.Find the probability that demand exceeds 220.Find...
- Q The National Sleep Foundation (NSF) recommends that collegestudents get between 8 and 9 hours of sleep per night. Notbelieving this is happening at a local college, a random sample of20...
- Q A recent national survey found that high school students watchedan average of 6.8 DVDs per month with a population standarddeviation of 0.5 DVDs. The distribution follows the normaldistribution. A random...
- Q (R code needed) Lifetimes of electronic components manufacturedby an electronic company are assumed to follow an Exp(λ)distribution with mean 1/λ. A random sample of 30 lifetimes inyears was obtained and...
- Q Using the data provided:Plot the data. What does the plot tell you about theappropriateness of using a trend and seasonally adjusted model foryour data?Develop a forecast model that incorporates both...
- Q Perform a test that shows the different applications of thecentral tendency and dispersion measures. Compare showing bothadvantages and disadvantages. Why use the standard deviationinstead of the average deviation?Minimum : 3...
- Q An important application of regression in manufacturing is theestimation of cost of production. Based on DATA (see chart below)from Ajax Widgets relating cost (Y) to volume (X), what is the...
- Q Present the regression output below noting the coefficients,assessing the adequacy of the model and the p-value of the modeland the coefficients individually.SUMMARY OUTPUTRegression StatisticsMultiple R0.2967345RSquare0.088051364Adjusted R Square0.08408637Standard Error11.78856107Observations694ANOVAdfSSMSFSignificance FRegression39258.4096743086.13655822.20718679.78014E-14Residual69095889.41876138.9701721Total693105147.8284CoefficientsStandard Errort...
- Q The Getz Products Company is investigating the possibility ofproducing and marketing backyard storage sheds. Undertaking thisproject would require the construction of either a large or smallmanufacturing plant. The market for...
- Q Four fair dices were rolled.Part(a) How many possible outcomes there will be, if the orderof dices are considered and their faces (number of points) arerecorded?Part(b) How many possible outcomes there...
- Q Toss 5 coins 25 times and note on each throw the number ofheads. Make a probability distribution of the number of heads. Findmean and variance of that distribution and compare...
- Q Using a scholarly citation, discuss a studythat extends the regression analysis where either dependent,independent, or both are qualitative. ExplainA description of the studythe conclusion.Thanks.
- Q A statistical program is recommended.The Consumer Reports Restaurant Customer SatisfactionSurvey is based upon 148,599 visits to full-service restaurantchains.†Assume the following data are representative of the resultsreported. The variable type indicates...
- Q The following time series shows the sales of a particularproduct over the past 12 months.MonthSales1105213531204105590612071458140910010801110012110(b)Use α = 0.4 to compute the exponential smoothingforecasts for the time series. (Round your answers...
- Q John surfs the website on a regular basis. Suppose the time hespent surfing the website per day is normally distributed, µ = 8minutes and σ = 2 minutes. If you...
- Q Sampling Distributions and the Central Limit Theorem:The National Survey of Student Engagement asks college studentsquestions about the quality of their education. In 2018, NSSEreported the following result about college freshman:During...
- Q You wish to test the following claim (HaHa) at a significancelevel of α=0.10α=0.10.      Ho:p1=p2Ho:p1=p2      Ha:p1<p2Ha:p1<p2You obtain a sample from the first population with 153 successesand 596 failures. You obtain a sample from...
- Q a) A data is collected from Lab A. Sample mean is 12, SD is 2.4and sample size if 16. Another set of data from Lab B have a meanof 10...
- Q Mercury is a persistent and dispersive environmental contaminantfound in many ecosystems around the world. When released as anindustrial by-product, it often finds its way into aquatic systemswhere it can have...
- Q IfXt is strictly stationary, show that the joint distributionfunction of Xt1,...,Xtn depends only on the time differencet2-t1,...,tn-t(n-1)
- Q The positive impact on women holistic advancement from unequalpay system for women. Describe how you may use CFA and SEM toconduct this own research, and why may choose to do...
- Q Construct a 95% confidence interval for the standarddeviation for both companies. Interpret and compare theresults. Company 1: S=1.38, n=36, mean=11.42. Company 2: S=55.27,n=36, mean=282.86
- Q In a clinical​ trial, 25 out of 822 patients taking aprescription drug daily complained of flulike symptoms. Supposethat it is known that 2.7​% of patients taking competing drugscomplain of flulike...
- Q Every person has a creative side, and it can beexpressed in many ways: problem solving, original and innovativethinking, and artistically, to name a few. Describe how you expressyour creative side.My...
- Q Q1In a class on 50 students, 35 students passed in all subjects, 5failed in one subject, 4 failed in two subjects and 6 failed inthree subjects.Construct a probability distribution table...
- Q Find one data set. 50 datums minimumYou may use NBA, NHL, MLB, stock market, coinmarketcap (cryptocurrency) or any other type of data.What type of data is it? Ordinal? Interval? Ratio?Create...
- Q The data in the accompanying table represent the population of acertain country every 10 years for the years​ 1900-2000. Anecologist is interested in finding an equation that describes thepopulation of...
- Q Suppose the probability of a part being manufactured by MachineA is 0.6Suppose the probability that a part was manufactured by MachineA and the part is defective is 0.09Suppose the probability...
- Q Question #1. The operations manager of a musical instrumentdistributor feels that demand for bass drums may be related to thenumber of television appearances by the popular rock group GreenShades during...
- Q IDXY123236346457587657767888978101211Test the significance of the correlation coefficient.Then use math test scores (X) to predict physics test scores(Y).  Do the following:Create a scatterplot of X and Y.Write the regression equation and interpret...
- Q Human Resource Consulting (HRC) surveyed a random sample of 66Twin Cities construction companies to find information on the costsof their health care plans. One of the items being tracked is...
- Q What is Statistical Significance? Date 01/29/2019What is statistical significance? If we randomly assignsubjects to two groups we would expect there to be some differencein the groups just by chance. If...
- Q For the data set shown​ belowx  y20  9830  9540  9150  8360  70​(a) Use technology to find the estimates of β0 and β1.β0 ≈b0=114.60​(Round to two decimal places as​ needed.)β1≈b1=−0.68​(Round to...
- Q For 50 randomly selected speed​ dates, attractiveness ratings bymales of their female date partners​ (x) are recorded along withthe attractiveness ratings by females of their male date partners​(y); the ratings...
- 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 Test the given claim. Assume that a simple random sample isselected from a normally distributed population. Use either the​P-value method or the traditional method of testing hypotheses.Company A uses a...
- Q draw six cards at random from a deck of 52 playing cards 60times with replacement. Let X be the number of queen cards.Find the probability distribution of X and Var...
- Q A simple random sample of 81 is selected from a population witha standard deviation of 17. The degree of confidence is 90%. Whatis the margin of error for the mean?
- Q Is the average amount of time spent sleeping each day differentbetween male and female students?Which hypothesis test is the most appropriate to use in thisproblem? Why? (Note: if you are...
- Q 1. Let's say there are 10,000 lawyers in the USA and 500 of themare Oreo cookie lovers. These 500 lawyers consume a total of 500Oreo cookies in a given time...
- Q The U.S. Census Bureau conducts annual surveys to obtaininformation on the percentage of the voting-age population that isregistered to vote. Suppose that 686 employed persons and 669unemployed persons are independently...
- Q In SAS, how do I extract the city, state, and zipcode intoseparate columns from a single variable with all three?Example-Bremen, KS, 66412Little River, KS, 67457Bird City, KS, 67731The above is...
- Q A researcher would like to determine if meditation training willaffect anxiety-related distress among a group of participants. Fora week prior to training, each participant records the number oftimes they feel...
- Q Using the data found in Table 4 and Bayes’ Formula, determinethe probability that a randomly selected patient will have StrepThroat given the SARTD test result was positive. Use the CDC...
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