Statistics question and answers for August 30, 2023
- Q the results of a survey in which people from high incomecountries were asked to report their level of education (less thanbasic, basic and advanced) and whether they were employed or...
- Q Using the data, find the sample skewness and excess kurtosis ofMichelson data on the speed of light (light.txt). Is this data setnrmally distribuited, based on this normal probability plot? 850740...
- Q 1.)the chair of the board of directors says, \"there is a 50%chance this company will earn a profit, a 30% chance it will losemoney next quarter.\" a.) use an addition...
- Q Find a dataset online, and get a feel for it by performing someEDA. Produce a single plot which you think captures an interestingaspect of the data, and comment on it....
- Q Data were gathered from a simple random sample of cities. Thevariables are Violent Crime (crimes per 100,000 population), PoliceOfficer Wage (mean $/hr), and Graduation Rate (%). Use theaccompanying regression table...
- Q A survey of 25 randomly selected psychiatrists found an averagehourly wage (including benefits) of $65.00 per hour. The samplestandard deviation was $6.25 per hour. 1. What is the populationmean? What...
- Q Essential Statistics for the Behavioral Sciences. Second EditionChapter 10, #22: A clinical psychologist noticed that the siblingsof his obese patients are often not overweight. He hypothesizedthat the normal-weight siblings consume...
- Q A survey of Internet users reported that 22% downloaded musiconto their computers. The filing of lawsuits by the recordingindustry may be a reason why this percent has decreased from theestimate...
- Q Essential Statistics for the Behavioral Sciences. Second EditionChapter 9, #20: A study evaluating the effects of parenting style(authoritative, permissive) on child well-being observed 20children (10 from parents who us an...
- Q *** Indicate if statement is true (T) or false (F), andexplain why? ***(a) A 95% prediction interval for a futureobservation at x0 is wider than the 95%confidence interval for the...
- Q Task: Apply mathematical problem solving skills to avariety of problems at the college level.To accomplish this task, the students will1. Identify what they are given and what they need to...
- Q For your study on the food consumption habits of teenage​ males,you randomly select 10 teenage males and ask each how many​12-ounce servings of soda he drinks each day. The results...
- Q A researcher knows from the past that the standard deviation ofthe time it takes to inspect a car is 16.8 minutes. A random sampleof 24 cars is selected and inspected....
- Q A random sample of 77 eighth-grade​ students' scores on anational mathematics assessment test has a mean score of 264 with astandard deviation of 40.This test result prompts a state school...
- 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 HW9#8Assume that the paired data came from a population that isnormally distributed. Using a 0.05 significance level andd=x−​y,find d overbard​, s Subscript dsd​,the t test​ statistic, and the critical values...
- Q The average income tax refund for the 2009 tax year was ​$3109.Assume the refund per person follows the normal probabilitydistribution with a standard deviation of ​$917. Complete parts athrough d...
- Q HW8#11A genetic experiment involving peas yielded one sample ofoffspring consisting of 430 green peas and 168 yellow peas. Use a0.01 significance level to test the claim that under the same​circumstances,...
- Q A cell phone company offers two plans to its subscribers. At thetime new subscribers sign up, they are asked to provide somedemographic information. The mean yearly income for a sample...
- Q HW8#10A certain drug is used to treat asthma. In a clinical trial ofthe​ drug,17 of 288 treated subjects experienced headaches​ (basedon data from the​ manufacturer). The accompanying calculatordisplay shows results...
- Q Choose one of the tools listed here that was not utilized in thecourse (SAS, R, or JMP,). Provide a brief description of this toolincluding its strengths and weaknesses. Describe a...
- Q Read the “Evaluating the Quality of Open Source Softwareâ€article (Spinellis, et al., 2009). What are the strengths andweaknesses of this particular study? (For example, does the studydo an adequate job...
- Q The file medinc.mtw contains data on the median incomes (medinc)of census dissemination areas in Toronto. (a) Treating this set ofdata as the population, use Minitab to calculate the populationmean and...
- Q A loan officer compares the interest rates for 48-monthfixed-rate auto loans and 48-month variable-rate auto loans. Twoindependent, random samples of auto loan rates are selected. Asample of eight 48-month fixed-rate...
- Q 1. From a box containing 10 red, 30 white, 20 blue and 15 orangeballs, 5 are drawn at random. Find the probability that:a) All are white - 0.008256723b) Be red,...
- Q A statistician would like to construct a hypothesis test of themean using the P-value approach. Rank the steps that thestatistician can follow to carry out this hypothesis test at alevel...
- Q (Question: Is the combined scores data approximately normal? Yesor no?)Data:RacePositionOral exam resultsWritten exam resultsCombined resultsBLieutenant45.834645.932BLieutenant52.924950.568BCaptain54.764951.304HLieutenant48.335854.132BLieutenant52.085654.432HLieutenant40.836454.732BCaptain605355.8WCaptain53.815856.324BLieutenant58.755556.5WLieutenant54.585856.632BLieutenant55.835857.132WLieutenant45.426557.168HLieutenant44.176657.268HCaptain42.866757.344WLieutenant44.586657.432WLieutenant51.256257.7WLieutenant57.925857.968BCaptain70.485058.192BLieutenant60.835859.132HLieutenant46.256859.3HCaptain57.146159.456WLieutenant606060WLieutenant49.586760.032BLieutenant51.256660.1BLieutenant556460.4BCaptain67.625660.648HLieutenant51.256760.7HLieutenant42.57360.8WCaptain48.576960.828BLieutenant56.256460.9BLieutenant56.676461.068WLieutenant56.256662.1HCaptain58.576562.428HLieutenant50.427162.768WLieutenant71.675762.868WCaptain55.246862.896HLieutenant51.677163.268BLieutenant69.176063.668HLieutenant57.57065WLieutenant50.427565.168BLieutenant66.256565.5WLieutenant557365.8HCaptain67.146565.856HLieutenant56.257366.3WLieutenant79.175967.068BCaptain52.387767.152WLieutenant64.586967.232BLieutenant70.836567.332WCaptain57.147567.856WLieutenant51.677968.068HLieutenant62.57268.2WLieutenant51.258068.5WLieutenant73.756669.1WLieutenant58.757669.1HLieutenant70.836869.132HCaptain60.487569.192WCaptain59.057669.22WCaptain71.436869.372WCaptain71.436869.372WLieutenant64.587369.632WCaptain78.576469.828WCaptain62.387569.952WLieutenant71.676970.068WLieutenant73.756870.3BCaptain70.957070.38WLieutenant77.56670.6HLieutenant53.758270.7WLieutenant65.837470.732WLieutenant58.337970.732HLieutenant69.177270.868HLieutenant558271.2WCaptain56.678171.268WCaptain82.386471.352BCaptain68.577471.828WLieutenant73.337171.932WLieutenant72.57272.2BLieutenant92.085972.232WLieutenant66.677672.268BLieutenant70.837472.732WLieutenant78.337073.332WCaptain707673.6WCaptain73.337473.732BLieutenant65.838074.332WLieutenant87.56674.6BCaptain82.387074.952WCaptain76.677475.068WLieutenant63.338375.132WCaptain73.817775.724WLieutenant74.177775.868BLieutenant80.427375.968HCaptain79.057476.02BLieutenant61.258676.1WCaptain807476.4WCaptain87.626976.448BLieutenant77.57676.6WLieutenant58.758976.9WCaptain84.297276.916WLieutenant73.758178.1WCaptain73.818178.124HCaptain708478.4WLieutenant69.588679.432WCaptain76.198279.676HCaptain76.198279.676WCaptain76.198480.876WCaptain88.577681.028WLieutenant68.339181.932WLieutenant63.759582.5WLieutenant80.838482.732WLieutenant73.338982.732WLieutenant73.759184.1WLieutenant808784.2WLieutenant858484.4WCaptain82.388785.152WLieutenant77.59185.6WLieutenant87.58787.2WCaptain809589WLieutenant88.759190.1WCaptain89.529592.808
- Q A headline read, “More than half of Americans Say Federal TaxesToo High.†The headline was based on a random sample of 1026 adultAmericans in which 534 stated the amount of...
- Q A lab is testing the amount of a certain active chemicalcompound in a particular drug that has been recently developed. Themanufacturer claims that the average amount of the chemical is...
- Q AlwaysRain Irrigation, Inc., would like to determine capacityrequirements for the next four years. Currently two productionlines are in place for making bronze and plastic sprinklers. Threetypes of sprinklers are available...
- Q An entrepreneur examines monthly sales (in $1,000s) for 40convenience stores in Rhode Island. (You may find it usefulto reference the appropriate table: z tableor t table)Excel dataSalesSqft14018101602500801010180217014023101101320901130110150013019508010101101770140184014023301402490120155012019002102320120170018025001702380160188012017801201610901230140192010012609012601902470130242011015501001260140223010015001401970120153012018001101520170221010014401101470a. Select the null...
- Q A manufacturing shop is designed to operate most efficiently atan output of 580 units per day. In the past month the plantaveraged 510 units per day.What was their capacity utilization...
- Q Are America's top chief executive officers (CEOs) really worthall that money? One way to answer this question is to look at rowB, the annual company percentage increase in revenue, versus...
- Q The average driving distance​ (yards) and drivingaccuracy​(percent of drives that land in the​ fairway) for 8golfers are recorded in the table to the right. Complete parts athrough e below.PlayerDistance​ (yards)Accuracy​...
- Q The score of 24 randomly selected exams in a geometry class aregiven below:72 85 62 88 75 65 76 99 74 67 83 50 98 78 90 70 80 55...
- Q Question textIn a random sample of 200 people, 32 people have blue eyes(characteristic B). Which of the following 95% confidence intervalsestimate the true proportion pp of measurements in thepopulation with...
- Q The (simulated) data (mg decrease per decilitre of blood) forthe Omega-3 group is stored in Table A1, and the data for thecontrol group is stored in Table A2. You are...
- 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​...
- Q 1. A population of values has a normal distribution with μ=182.1and σ=28.9. You intend to draw a random sample of size n=117.Find the probability that a single randomly selected value...
- Q Very Bad Drugs Corp believes that their new drug, Brain Boost,increases focus and alertness by 15%. Answer the following:(a)Formulate a set of two hypotheses to test their claim inwords and...
- Q For these binomial settings, give the parameters n and p. a)Orchid flowers can be “left-handed†or “right-handed†depending onthe position of certain structures. 25% of flowers are left-handed.In a sample...
- Q The data in the table, from a survey of resort hotels withcomparable rates on Hilton Head Island, show that room occupancyduring the off-season (November through February) is related to theprice...
- Q The following data are the heights of fathers and their sons ininches. The father's height is his height when he was the same ageas the son.Father's HeightSon's Height44444747434641424547444444454445a. A geneticist...
- Q 2. Use the methods below to normalize the following group ofdata: 150, 800, 640, 290, 2800(a)min-max normalization by setting min = 0 and max = 1(b) z-score normalization(c) normalization by...
- Q A new vaccine developed by Very Bad Drug Corp is about to bedistributed en masse in a Third World country experiencing anepidemic. The vaccine either does nothing or is effective...
- Q A manager is looking at the number of sick days used byemployees in a year.H0: the average number is 8 or belowH1: the average is over 8We know that the...
- Q Discuss a management decision-making perspective for Indexnumbers with detailed examples.
- Q State University offers several sections of a BusinessStatistics course in an in-class and online format. Both formatsare administered the same final exam each year. You have beenassigned to test the...
- Q Q1: Estimate the absolute standard deviation and the coefficientof variation for the results of the following calculations. Roundto the correct number of significant figures. The numbers inparenthesis are absolute standard...
- Q The Dean of the Business School at State University would liketo test the hypothesis that no difference exists between theaverage final exam grades for the Introduction to Marketing courseand the...
- Q The University of California, Berkeley (Cal) and StanfordUniversity are athletic archrivals in the Pacific 10 conference.Stanford fans claim Stanford's basketball team is better than Cal'steam; Cal fans challenge this assertion....
- Q A clinical trial is run to assess the effects of different formsof regular exercise on HDL levels in persons between the ages of 18and 29. Participants in the study are...
- Q A social scientist would like to analyze the relationshipbetween educational attainment (in years of higher education) andannual salary (in $1,000s). He collects data on 20 individuals. Aportion of the data...
- Q 3. A researcher is trying to determine the average SAT score for2018 SAT test-takers. (which is known to follow normaldistribution). He gathers a sample of 11 students and calculates x̄...
- Q A transect is an archaeological study area that is 1/5mile wide and 1 mile long. A site in a transect is thelocation of a significant archaeological find. Let xrepresent the...
- Q The relationship between hospital patient-to-nurse ratio andvarious characteristics of job satisfaction and patient care hasbeen the focus of a number of research studies. Suppose x =patient-to-nurse ratio is the independent...
- Q Q8 Researcher A recruited a random sample of 100 pandas.Researcher B also recruited a random sample of 100 hippos. Supposethe health scores for the panda population has a mean of...
- Q Please TYPE your answer:What is the primary feature of a good sample?
- Q interpreting conclusions of hypothesis tests:
- Q Please TYPE your answers:(a) Name the types of NONsampling error and define them in asentence or two.(b) Name the types of sampling error and define them in asentence or two.
- Q Two hundred and eighty boys completed a test that measures thedistance that the subject can walk on a flat, hard surface in 6minutes. For each age group shown in the...
- Q In Norway, the distribution of birth weights for full-terminfants whose gestational age is 40 weeks is approximately normalwith mean μ= 3500 grams. We wish to determine if the birth weightsof...
- Q The Transportation Safety Authority (TSA) has developed a newtest to detect large amounts of liquid in luggage bags. Based onmany test runs, the TSA determines that if a bag does...
- Q An insurance company has the business objective of reducing theamount of time it takes to approve applications for life insurance.The approval process consists of underwriting, which includes areview of the...
- Q In a random sample of six microwave​ ovens, the mean repair costwas ​$75.00 and the standard deviation was ​$11.00. Assume thepopulation is normally distributed and use a​ t-distribution toconstruct a...
- Q Draw the feature space plot (scatter plot) for the Green-Red,NIR-Green and NIR-Red band combinations. Based on these plots,which two bands are the most correlated?10597858282811081049382818110610910288818110610810389848110510610495898310410298949086Green12811595898990129124109948989128133125102938912913412410195901301281261121049212812511810810496Red1029791919192104101969290901031061009290891021061019392891021031029795901019998999894NIR
- Q x (Bins)frequency0010203245586137338429661077111051210313110141051584167017511840192720272115225237242252261270280290300(7) On the Histogram worksheet, calculate allfrequencies of the distribution using the table shown. (To threedecimal places) The relative frequency of all values in the (X ≤ 7)range is...
- Q These are a few short answer questions I am stumped on.1. What is the sampling distribution of the differencebetween means? Why can’t you conduct an independent samples t-testwithout it?2. What...
- Q The income distribution in two cities is the followingCity ACity B10000 – 12000100005000 – 7000400012000 - 1400050007000 – 9000600014000 - 16000200009000 – 11000800016000 – 180005000011000 – 130001400018000 - 200004000013000 –...
- Q When would a Parole Officer want to know the mean differencesbetween two or more groups? Describe a situation, including why andhow it would be used.
- Q In a recent survey of 150 students at a large community college,86 students said they were “regular†coffee drinkers. It is knownthat 64% of all students at that community college...
- Q According to Readers Digest, 49% of primary care doctors thinktheir patients receive unnecessary medical care. Use z-table.a. Suppose a sample of 290 primary care doctorswas taken. Show the sampling distribution...
- Q Consider the following sample data for the relationship betweenadvertising budget and sales for Product A: Observation 1 2 3 4 5 67 8 9 10 Advertising ($) 40,000 50,000 50,000...
- Q Suppose we have annual income for a sample of men and womenprovided below. Either using Excel or conducting this by hand, testto see whether the average annual income of men...
- Q The Wall Street Journal reported that 33% of taxpayerswith adjusted gross incomes between $30,000 and $60,000 itemizeddeductions on their federal income tax return. The mean amount ofdeductions for this population...
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