Statistics question and answers for July 30, 2023
- Q Exercise 3.8.18: How many ways are there to choose five cardsfrom 52 so that you have all the aces? How many ways are there tochoose five cards from 52 so...
- Q According to a marketing​ website, adults in a certain countryaverage 5454 minutes per day on mobile devices this year. Assumethat minutes per day on mobile devices follow the normaldistribution and...
- Q A random sample of 90 observations produced a mean of 32.4 froma population with a normal distribution and a standard deviation?=2.98.(a) Find a 90% confidence interval for μ≤?≤(b) Find a...
- Q The types of browse favored by deer are shown in the followingtable. Using binoculars, volunteers observed the feeding habits ofa random sample of 320 deer.Type of BrowsePlantCompositionin Study AreaObserved Number...
- Q In this problem, assume that the distribution of differences isapproximately normal. Note: For degrees of freedomd.f. not in the Student's t table, usethe closest d.f. that is smaller. Insome situations,...
- Q A law firm specializing in corporate law has 4 lawyers. Becauseof various reasons, on any given day, the probabilities that eachlawyer will be attending a trial is:Â Â 0.90, 0.90, 0.85,0.80. Note...
- Q Suppose a distribution has a mean of 100 and a standarddeviation of 20. Further suppose that random samples of size n =100 are taken with replacement from this distribution. The...
- Q A Drug Company wishes to do a clinical trial on a newantidepressant drug, “summerâ€. Four groups of clinically depressedparticipants receive: 0 mg, 5 mg, 10 mg, and 15 mg of“summerâ€.  Depressed...
- Q Anystate Auto Insurance Company took a random sample of 370insurance claims paid out during a 1-year period. The average claimpaid was $1535. Assume σ = $254.Find a 0.90 confidence interval...
- Q 1) What is a hypothesis, a hypothesis test, a null hypothesisand an alternative hypothesis?2) What is a P-value, critical value and a test statistic?Provide an example of each and describe...
- Q The birth weights for two groups of babies were compared in astudy. In one group the mothers took a zinc supplement duringpregnancy. In another group, the mothers took a placebo....
- Q A developmental psychologist is examining problem solvingability for grade school children. Random samples of 5-year-old,6-year-old, and 7-year-old are obtained and a set of problems aregiven to them. The number of...
- Q Suppose the number of cars in a household has a binomialdistribution with parameters n = 12, and p = 10 %. Find theprobability of a household having: (a) 1 or...
- Q The stem diameter of wheat is important because easy breakage ofthe wheat can interfere with harvesting the crop. The diameter ofwheat is known to be normally distributed with a mean...
- Q A researcher studies the effect of the herbal stimulantButtercup on short-term memory; she randomly divides a sample of 32into four (4) groups.  Each group receives 0 mg, 500 mg,1000 mg and...
- Q Weights of 50 babies at birth.Write at least a 1-Page Report Open a Word DocumentIntroduction--Provide a description of your topic and cite whereyou found your data. Sample Data—Include a 5x10...
- Q EXPERIMENT 1Â Â Â Â Part 1:Dr. Saunders wanted to know whether adolescents who hadrestricted television viewing time studied more than adolescentswho had unlimited television viewing time. She recruited a smallsample of children aged...
- Q What is the critical value t* for a 99% confidence interval whenn = 20?
- Q Plz answer all the questions i'm boutta fail this classSuppose that for a typical FedEx package delivery, the cost ofthe shipment is a function of the weight of the package....
- Q What is the “Prime Rate-1 Month Prior†for the followingCountries:Canada- 2.45United States-3.25United Kingdom-0.66European Central BackJapanWhat methodology was used to collect and analyze the data? Didthe source collect the data? When...
- Q Confidence IntervalsIn a random sample of 1100 American adults it was found that 320had hypertension (high-blood pressure). The US Department of Healthand Human Services (HHS) wants the population proportion ofhypertension...
- Q Let X1,...,Xn be i.i.d. N(θ,1), where θ ∈ R is theunknown parameter.(a) Find an unbiased estimator of θ^2 based on(Xn)^2.(b) Calculate it’s variance and compare it with the CramÌer-Rao lower...
- Q Bud Light ran a SuperBowl advertisement stating that it doesnot use corn syrup – in direct contrast to its competitors. The BudLight marketing department wants to know the impact of...
- Q Les wants to know whether a funny ad or a serious ad is moreeffective at getting consumers to like his company, XYZ Toys. Herandomly assigns 100 consumers to watch the...
- Q A typical California license plate consists of a 7-characterstring as in the image below. The string startswith a number, isthen followed by three letters from the alphabet, and then followedby...
- Q Tire Kingdom installs automobile tires on afirst-come-first-served basis. A random sample of 40 customersexperienced an average wait time of 90.5 minutes. Assume that thestandard deviation of the total wait time...
- Q Ina survey of 900 American adults, 351 said that their favorite sportwas football. Construct a 95% confidence interval for thepopulation of American adults who say that their favorite sport isfootball....
- Q A study of randomly selected Americans found that of 1,792 men,244 had cardiovascular disease (CVD) and of 2,007 women, CVD wasprevalent in 135 of them. Conduct a hypothesis test to...
- Q Suppose that Xi’s are coming from a normal population with amean μ =10 and known variance σ=2. Generate 100 samples ofn=50 observations coming from the population of interest. Please,construct the...
- Q The fill amount of bottles of a soft drink is normally​distributed, with a mean of 1.0 liter and a standard deviation of0.06 liter. Suppose you select a random sample of...
- Q Please find or gather Statistical data and provide a real-lifeexample of Continuous Random Variables with full steps. you may tryto conduct your own experiment/survey/data collection foroccurrences of events you come...
- Q Waterbury Insurance Company wants to study the relationshipbetween the amount of fire damage and the distance between theburning house and the nearest fire station. This information willbe used in setting...
- Q Suppose the following data were collected relating CEO salary toyears of experience and gender. Use statistical software to findthe regression equation. Is there enough evidence to support theclaim that on...
- Q An office supply company services copiers and tracks how manymachines are serviced and the length of time (in minutes) for aservice call. The data below for 11 clients is below.Sum...
- Q HourSample 1Sample 2Sample 3Sample 4Sample 5Sample 6Sample 7Sample 8198.270698.82376101.8175100.1819102.9594101.16595.2595798.974232100.7166101.886698.5681398.77126101.827398.20298101.697599.63706398.9922101.9845103.785997.94211100.9618102.519197.33631101.64764103.247997.55057105.594299.3935899.5792295.3969496.26237102.56665100.40399.99954100.1254100.2193.46717103.2011100.1247101.0385697.26687101.059896.30829100.240298.0744797.92167102.4083104.06867101.224398.1746699.66765101.106100.289199.3713699.3344295.24574899.7730495.7056899.561599.89883100.3117104.133100.444596.28674998.5118699.89239101.376299.76019101.563297.3204199.62125101.41661097.4090497.85005101.42103.654896.49857101.3962103.880598.63672The data in the worksheet labeled “Problem 5&6†in the file“Test 3 Data†provides samples of size 8, collected each hour, fora...
- Q The Centers for Disease Control reported the percentageof people 18 years of age and older who smoke (CDC website,December 14, 2014). Suppose that a study designed to collect newdata on...
- Q The National Longitudinal Study of Adolescent Health interviewedseveral thousand teens (grades 7 to 12). One question asked was“What do you think are the chances you will be married in the...
- Q A study was conducted to explore the effects of ethanol on sleeptime. Fifteen rats were randomized to one of three treatments.Treatment 1 got only water (control). Treatment 2 got 1g...
- Q The following question is based on scenario 2:Researchers are interested in seeing how sitting for long periodsof time can influence cardiovascular health. They ask people howmany hours per day they...
- Q Explain in detail how a sampling distribution of means is usedin constructing the rejection regions for one-tailed and two-tailedresearch hypotheses.
- Q QUESTION 2Using the following table. Write a concise, relevant, accurateand precise interpretation of the SPSS output provided assuming thedependent variable is Total Perceived Stress. Include supportingstatistical evidence.………………………………………………………………………………………………………………..………………………………………………………………………………………………………………..………………………………………………………………………………………………………………..CorrelationsTotal perceivedstressTotal OptimismTotal MasteryageTotal...
- Q Provide two examples of how regression analysis could beused in the business world. (if you are currently employed, thinkabout how your firm could use regression analysis to evaluate andimprove business...
- Q in a random sample of 8 Laptops, the mean repair cost per laptopwas $90.46 and the standard deviation was $19.30. Assume thevariable is normally distributed and construct a 90% confidenceinterval...
- Q Match the following:A.Matched-pairs t testB.Inference for regressionC.Two-sample independent t test about meansD.Two-sample z test about proportionsE.1 sample Z test about a meanF.Chi Square testG.ANOVAH.1 sample Z test about a proportionI.1...
- Q Can people tell the difference between a female noseand a male nose? Eight Caucasian males and eight Caucasian femalesposed for nose photos. The article states that none of thevolunteers wore...
- Q The number of hours 12 studentswatched television during the weekend and the scored of eachstudent who took a test the following Monday are listed below.Hours0123355567710Test968582748768767066657550a) Find linear regression equation using...
- Q A market researcher investigated consumer preferences forCoca-Cola and Pepsi before a taste test and after a taste test. Thefollowing table summarizes the results from a sample of 200consumers:SOFT DRINK:PREFERENCE:Coca-ColaPepsiBefore Taste...
- Q In one of Boston’s public parks, mugging in summer months hasbeen a serious issue. A police cadet took a random sample of 10days and compiled the data. For each day,...
- Q 4. Julie visits the local park 90 times, and sees her favoritepigeon 38 times. Let p be the probability that Julie sees thepigeon on any given visit, and assume that...
- Q One timber company claims that the amount of usable lumber inthe trees being harvested in ClearCut is approximately normallydistributed, with a mean of 256 cubic feet per tree and a...
- Q In one of Boston’s public parks, mugging in summer months hasbeen a serious issue. A police cadet took a random sample of 10days and compiled the data. For each day,...
- Q Exercise 5 (15) In the process of learning how toconduct a sign test, each student inevitably punches their computerscreen several times. I have found that students who punch theirscreens during...
- Q Suppose that you randomly draw one card from a standard deck of52 cards. After writing down which card was drawn, you replace thecard, and draw another card. You repeat this...
- Q 3. The distances traveled by individuals to work is exponential,with a mean of 9 miles.(a) What is the probability that they travel between 5 and 11miles? (2)(b) What is the...
- Q The following statistics are computed by sampling from threenormal populations whose variances are equal: (You may findit useful to reference the t table andthe q table.)xbar = 26.5, n1 =...
- Q (b) In a tutorial session of AMA1501, there are 11 accountingstudents, 6 marketing students and 8 financial service students.Among these 25 students, a group of 5 students is selected randomlyfor...
- Q A company wants to study therelationship between an employee's length of employment and theirnumber of workdays absent. The company collected the followinginformation on a random sample of seven employees.Number of...
- Q 1. The reaction of an individual to a stimulus in apsychological experiment may take one of the two forms: A or B. Anexperimenter wishes to estimate the true proportion of...
- Q In Example 6.33 we found the distribution of the sum of twoi.i.d. exponential variables with parameter λ. Call the sum X. LetY be a third independent exponential variable with parameter...
- Q Two plots at Rothamsted Experimental Station were studied forproduction of wheat straw. For a random sample of years, the annualwheat straw production (in pounds) from one plot was asfollows.6.126.546.475.987.317.187.065.796.245.916.14Use a...
- Q You are interested in finding a 90% confidence interval for themean number of visits for physical therapy patients. The data belowshow the number of visits for 12 randomly selected physical...
- Q How much money do winners go home with from the television quizshow Jeopardy? To determine an answer, a random sample of winnerswas drawn and the amount of money each won...
- Q In a​ lottery, you bet on a six-digit number between 000000 and111111. For a​ $1 bet, you win ​$700,000 if you are correct. Themean and standard deviation of the probability...
- Q A consumer product testing organization uses a survey of readersto obtain customer satisfaction ratings for the nation's largestsupermarkets. Each survey respondent is asked to rate a specifiedsupermarket based on a...
- Q Question 4 :In the planning of themonthly production for the next four months, in each month acompany must operate either a normal shift or an extended shift(but not both) if...
- Q Imagine our population of interest is all of the students whotook a statsquiz. The average quiz score from all of the studentsin the class was 85 and the variance was...
- Q Bicycling, the world's leading cycling magazine,reviews hundreds of bicycles throughout the year. Their \"Road-Race\"category contains reviews of bikes used by riders primarilyinterested in racing. One of the most important factors...
- Q Question 2 There are 6 cities inKilroy County.  The county must determine where to buildcentral fire stations.  The county wants to build theminimum number of central fire stations needed to ensure that...
- Q 1) The mean lifetime of a tire is 36 months with a variance of49. If 126 tires are sampled, what is the probability that the meanof the sample would differ...
- Q After examining these data for all the jurisdictions, someonenotes that certain areas have an unusually high “percent of 18-64yr-olds with no high school diploma.†Based on this finding, thisindividual concludes...
- Q Nigel Rex, Remski Catsakoff and Rudolfo, are back with anotherlogic problem. Using the variables as indicated below, translatethe following English sentences into propositions and then providea formal proof to show...
- Q An economist wants to estimate the mean per capita income (inthousands of dollars) for a major city in California. Suppose thatthe mean income is found to be $23.1 for a...
- Q Define the stochastic process  where .Find  Â
- Q 1. In a presidential election, 308 out of 611 voters surveyedsaid that they voted for the candidate who won. Use a 0.01significance level to test that among all voters, the...
- Q 1) what's the probability that someone else has thesame birthday as you (assuming neither has a birthday in a leapyear).2) what's the probability that someone in a room of 20people...
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