Statistics question and answers for August 02, 2023
- Q A farmer wanted to know if the amount of feed consumed by hischickens would be affected by the presence or absence ofhatchlings. Two groups of chickens were raised from hatching...
- Q Carol is running on the cross-country team, and she's reallygood at that too! It is estimated that Carol has a 60% probabilityof winning any race that she enters. There are...
- Q Run No.CupTemp. (˚C)Time (sec.)1C101391RT22481H46212C61622RT22452H44203C81493RT22483H4220Avg.C8150Avg.RT2247Avg.H4420.33Using graphing software such as Excel®, graph theresults of Activity 1. Please see the Introduction to Graphingmanual for guidance.            a. What are the two variables that you graphed?            b.Which...
- Q what is a moving average?
- Q For the following below you should decidea) What test would you use?b) Why would you use this test?1. You want to know if major in university and tolerance ofambiguity are...
- Q A medical rehabilitation foundation reports that average cost ofrehabilitation for stroke victims is $23,672. A researcher wishesto find out the average costs of rehabilitation by selecting arandom sample of 35...
- Q For each of the following you should decidea) What test would you use?b) Why would you use this test?You wonder if changing the format on a statistics test willchange the...
- Q Answer these questions about the study described here: A groupof second graders are being studied to find out the effects ofvarious exercises on their health. Subjects in the study aredivided...
- Q Question 1: For each of the following below you shoulddecidea) What test would you use?b) Why would you use this test?You wish to test the hypothesis that introverted people earnless...
- Q USE R AND SHOW CODES!!3.a. In 1988, 71% of 15-44 year old women who have ever beenmarried have used some form of contraception. What is theprobability that, in a sample...
- Q Reports suggest that the average credit card debt for recentcollege graduates is $3000. FedLoan Servicing believes the averagedebt of graduates is much less than this, so it conducts a study...
- Q Taller basketball players have a theoretical shooting advantagebecause it’s harder to block them. But can a player’s heightdetermine how well they shoot free throws, where there is nodefender?Player Height (cm)Free...
- Q Hire-a-Car System rents three types of cars at two differentlocations. The profit made per day for each car type and company atthe two locations is listed below:Car TypeCompanyType 1Type 2Type...
- Q Salaries of 47 college graduates who took a statistics course incollege have a​ mean, overbar x​, of $65,600. Assuming a standard​deviation, σ​, of $12,213​, construct a 95​% confidence intervalfor estimating...
- Q A travel association reported the domestic airfare (in dollars)for business travel for the current year and the previous year.Below is a sample of 12 flights with their domestic airfares shownfor...
- Q Question 1Â Â Â Which of the following statements about theChi Square statistic is NOT true?Chi Square squares the differences between observed andexpected frequencies, thus inflating the true difference.Chi Square is not...
- Q The following results come from two independent random samplestaken of two populations.Sample 1Sample 2n1 = 60n2 = 35x1 = 13.6x2 = 11.6σ1 = 2.5σ2 = 3(a)What is the point estimate...
- Q A professor wants to estimate how many hours per week herstudents study. A simple random sample of 78 students had a mean of15.0 hours of studying per week. Assume that...
- Q A random sample of 20 subjects was asked to perform a giventask. The time in seconds it took each of them to complete the taskis recorded below:49, 26, 46, 40,...
- Q If you take this sample and break into 2 samples, one forgraduate degrees (MBA and MSE) and one for undergraduate degrees(BA and BSE), would you believe the populations have differentGPAs?3.56MBA3.51BA3.75MBA2.85BA3.2MBA2.94BA3.2MBA3.25BA3.87MSE2.65BSE3.2MSE3.47BSEÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3.46Mean...
- Q Question 1: A researcher would like to estimate the true meannumber of hours adults sleep at night. Suppose that populationsleep time is known to follow a Normal distribution with standarddeviation...
- Q The marketing manager of a firm that produces laundry productsdecides to test market a new laundry product in each of the firm'stwo sales regions. He wants to determine whether there...
- Q If x is a binomial random variable, compute p(x) for each of thefollowing cases:(a) n=3,x=2,p=0.9 p(x)=(b) n=6,x=5,p=0.5 p(x)=(c) n=3,x=3,p=0.2 p(x)=(d) n=3,x=0,p=0.7 p(x)=
- Q A recent study 41 compared 298 children with autismspectrum disorder to 1507 randomly selected control childrenwithout the disorder. Of the children with autism 20 of the mothersand used antidepressants drugs...
- Q A batch of 400 sewing machines contains 6 that aredefective.(a) Three sewing machines are selected at random, withoutreplacement. What is the probability that the second sewing machineis defective, but the...
- Q Constructing Confidence Intervals In Exercises 17 and 18, youare given the sample mean and the sample standard deviation. Assumethe variable is normally distributed and use a normal distributionor a t-distribution...
- Q The owner of Britten's Egg Farm wants to estimate the meannumber of eggs laid per chicken. A sample of 20 chickens shows theylaid an average of 19 eggs per month...
- Q An experiment was conducted see the effect on fertilizer onproduction of Mameys. H0 : fertilizers have no impact on mameyproduction. H1 : fertilizers have an impact on mamey production.There are...
- Q 1. Given the incidence matrix shown below: a. Apply the rankingorder clustering algorithm in order to establish the appropriatepart families and machine cells (20 points). 0 0 1 0 1...
- Q 2. A least squares adjustment is computed twice on a data set.When the data is minimally constrained with 10 degrees of freedom,a variance of 1.07 is obtained. In the second...
- Q Computers in some vehicles calculate various quantities relatedto performance. One of these is the fuel efficiency, or gasmileage, usually expressed as miles per gallon (mpg). For onevehicle equipped in this...
- Q A)In a study of distances traveled by buses before the firstmajor engine failure, a sample of 191 buses results in a mean of96,700 miles and a population standard deviation of...
- Q DestinationDeparting Flight Numbers (list all departing flightsegments)Distance(round to nearest mile)AmountMiamiDelta 3899/ Delta 951993$328San DiegoDelta 3899/ Delta 19092,321$609New York CityDelta 3899/ Delta 2021555$508ChicagoDelta 3899/ Delta 1608516$205SeattleDelta 3899/Delta 36422,568$491Salt Lake CityDelta 2899/...
- Q A research firm conducted a survey to determine the mean amountsteady smokers spend on cigarettes during a week. The populationmean is $25 and the population standard deviation is $15. What...
- Q 2.         Completethe following in regard to the footlength and height categories ofthe dataset:                                                                                                     a.   In the region to the right, produce ascatterplot of the height versus footlength data (remember thismeans footlength runs along...
- Q A student claims that he can correctly identify whether a personis a business major or an agriculture major by the way the persondresses. Suppose in actuality that if someone is...
- Q 9.50. t test and and retail; Many communities worldwide arelamenting the effects of so-called big-box retailers (eg. Walmart)on their local communities, particularly on small, independentowned shops. Do these large stores...
- Q 1) Xi~Bernoulli(p), MLE and MOME of p2) Xi~Exp(λ), MLE and MOME of λ3) Xi~Normal(μ, σ2 ), MLE and MOME of μ,σ2
- Q Human Resource Management researchers examined the impact ofenvironment on employee development. Employees were randomlyassigned one of the following four workplace types/conditions:Impoverished (isolated cubicles each with bare minimum equipment -chair, desk...
- Q Depressed patients were randomly assigned to one of threegroups: a placebo group, a group that received a moderate dose ofthe drug, and a group that received a high dose of...
- Q Students completed a high school senior level standardizedalgebra exam. Major for students was also recorded. Data in termsof percent correct is recorded below for 32 students. We areinterested to see...
- Q Suppose that at a large university 30% of students are involvedin intramural sports. If we randomly select 12 students from thisuniversity, what is the probability that no more than 4...
- Q Suppose that the total carbohydrates in the listed cereals areapproximated by a normal curve with a mean of 30.7931 and astandard deviation of 8.8858. What is the probability that arandomly...
- Q In a state, 50,000 students graduated from four-year not forprofit colleges in 2019. Out of these 50,000 graduates, 20,000students graduated from private colleges, and 30,000 studentsgraduated from public colleges. You...
- Q 1. A t-test should be used when the standard deviation of thepopulation is known, whereas a z-test should be used when thestandard deviation of the population is unknown. True orFalse?2....
- Q If we run a one-way ANOVA on 4th graders, 5th graders,and 6th graders, which of these outcomes are possiblytrue?There is a significant difference between 4th and 5thgraders, but not between...
- Q Anyone who has been outdoors on a summer evening has probablyheard crickets. Did you know that it is possible to use the cricketas a thermometer? Crickets tend to chirp more...
- Q For what type of dependent variable are poisson and negativebinomial regressions appropriate? Give an example of such avariable. In what metric are these regression coefficients? Whatcan we do to them...
- Q . Consider the following table. You need to find out ifthere is an association betweeneducational attainment and annual income.Income below $35,000Income $35,000 to $65,000Income more than $65,000TotalNo college education12210085307Some college...
- Q In the book Advanced Managerial Accounting, Robert P.Magee discusses monitoring cost variances. A cost varianceis the difference between a budgeted cost and an actual cost. Mageedescribes the following situation:Michael Bitner...
- Q A company produces refrigerator motors. These engines have alife expectancy of 19.4 years with a standard deviation of 4.8years. Assume that the service life of the motors is normallydistributed.a) Calculate...
- Q The owner of a restaurant that serves Continental-style entréeshas the business objective of learning more about the patterns ofpatron demand during the Friday-to-Sunday weekend time period. Shedecided to study the...
- Q Deluxe River Cruises operates a fleet of river vessels. Thefleet has two types ofvessels: A type A vessel has 60 deluxe cabins and 160 standardcabins, whereas a type B vessel...
- Q Adults aged 18 years old and older were randomly selected for asurvey on obesity. Adults are considered obese if their body massindex (BMI) is at least 30. The researchers wanted...
- Q 3. Write a Matlab script that describes the dynamics of Pressureand Flow in the systemic arteries and Left Ventricle. Assume that:1) Pressure in the Left atrium (PLA) and in theSystemic...
- Q A hamburger chain sells large hamburgers. When we take a sampleof 40 hamburgers and weigh​ them, we find that the mean is 0.52pounds and the standard deviation is 0.3 pound.Technology...
- Q Indicator variables are useful under which of the followingconditions:a.Some observations have a particular characteristic or attributewhile others do notb.An individual may not wish to disclose the exact value (forexample, age)...
- Q Subjects in a verbal learning study learned two equivalentlydifficult words to a criterion of one complete trial through thelist without error. In one condition, the subjects were tested witha vocal...
- Q Ata .01 significance level with a sample size of 18, find thecritical value for the correlation coefficient of 1.
- Q A random sample of 324 medical doctors showed that 178 had asolo practice.(b) Find a 98% confidence interval for p. (Use 3decimal places.)lower limitupper limitWhat is the margin of error...
- Q Find a 99% confidence interval for a mean of 220. Does the teststastic lie in the confidence interval?Standard Deviation: 74.
- Q Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Purpose: To ensurethat you can get StatCrunch up and running, download and open adata file, create graphical and numeric output, and transfer theoutput into Word.Open the data file Soda.csv in...
- Q To assess a cola video ad, a random sample of 38 individualsfrom a target audience was selected to participate in a copy test.Participants viewed two ads, one of which was...
- Q The housing market has recovered slowly from the economic crisisof 2008.​ Recently, in one large​ community, realtors randomlysampled 2626 bids from potential buyers to estimate the averageloss in home value....
- Q For the next 4 questions, please read the descriptionbelow.A marketing company wants to know the mean price of newvehicles sold in an up-and‑coming area of town. Marketingstrategists takes a simple...
- Q A random sample of 5562 physicians in Colorado showed that 3062provided at least some charity care (i.e., treated poor people atno cost).(a) Let p represent the proportion of all Colorado...
- Q xyfxy(x,y)-1-21/8-0.5-11/40.511/2121/8Show that the function above satisfies the probabilities of ajoint probability mass function.Find E(X), E(Y), V(X), V(Y)Find marginal probability distribution of XFind the covariance and correlation.
- Q On a night drive, a driver’s response time to any animalcrossing the highway is normally distributed with a mean of 0.4seconds and a standard deviation of 0.05 seconds. draw standardnormal...
- Q A random sample of workers have been surveyed and data collectedon how long it takes them to travel to work. The data are in thisfile.Compute a 99% confidence interval for...
- Q Two teaching methods and their effects on science test scoresare being reviewed. A random sample of 16 16 students, taught intraditional lab sessions, had a mean test score of 80.8...
- Q Question 1The binomial formula has two parts. The first part of thebinomial formula calculates the number of combinations of Xsuccesses. The second part of the binomial formula calculates theprobability associated...
- Q A 2009 Pew Research Survey of a nationallyrepresentative sample of 242 cell phone users, aged 16 to 17 years,found that 52% had talked on the phone while driving.1. Find a...
- Q A non-profit agency wants to estimate the proportion of adultswho answer yes to the question, ‘Was there ever a time in your lifewhen you did not have a place to...
- Q The 2010 U.S. Census found the chance of a household being acertain size, the data is in the table. Size of household 1 Person(26.7%),2 Person (33.6%), 3 Person (15.8%), 4...
- Q In Pennsylvania, 6,165,478 people voted in the election. Trumpreceived 48.18% of the vote and Clinton recieved 47.46%. Thisdoesn't add up to 100% because other candidates received votes. Alltogether these other...
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