Statistics question and answers for August 22, 2023
- Q The excel data are flash durations, in milliseconds, of a sampleof 35 male fireflies of the species Photinus(Cratsley and Lewis2003). You must use excel tools data analysis and descriptivestatistics to...
- Q It is rare that you will find a gas station these days that onlysells gas. It has become more common to find a convenient storethat also sells gas. The data...
- Q COMPUTER CALCULATIONS:I need to know how to code in R for the solutions, notby hand.2. Look at the data in Table 7.18 on page 368 of the textbook.These data are...
- Q A sample of 1000 customers was selected in Rhode Island todetermine various information concerning consumer behavior. Amongthe questions asked was “Do you enjoy shopping at Shopping CenterA?†The results are...
- Q Suppose you want to determine whether the brand of laundrydetergent used or the temperature affects the amount of dirtremoved from your laundry. To this end, you buy two different brandof...
- Q A simple random sample of size n is drawn from a population thatis normally distributed. The sample​ mean, x overbar​, is found tobe 110​, and the sample standard​ deviation, s,...
- Q A group of 32 rats were randomly assigned to each of 4 dietslabelled (A, B,C, and D). Researchers measured the liver weight asa percentage of body weight (note: two rats...
- Q Suppose the National Transportation Safety Board (NTSB) wants toexamine the safety of compact cars, midsize cars, and full-sizecars. It collects a sample of three for each of the car types.Using...
- Q The maximum amount of time a guest at the Holiday Inn can waitfor an elevator is 4 minutes. Assuming the wait time follows auniform distribution:How long should a guest expect...
- Q According to the Normal model ​N(0.071​,0.031​) describingmutual fund returns in the 1st quarter of​ 2013, determine whatpercentage of this group of funds you would expect to have thefollowing returns. Complete...
- Q A telemarketer is trying two different sales pitches to sell acarpet cleaning service. For his aggressive pitch, 175 people werecontacted by phone and 62 of those people bought the cleaningservice....
- Q Use the distribution below to test that Plain M&Ms followthe stated distribution. Discuss your choice of ?. Would adifferent ? have changed your conclusion?M&M states the following distribution for PlainM&Ms:Red...
- Q Using the “Rule of Thumb†guideline flow chart, whatwould be the best choice for a 2-Level, 2-Factor Design?Taguchi L18 DesignBox-Behnkin DesignScreening DesignFull Factorial DesignA 2-level design is said to be...
- Q Betty DeRose, Inc. operates two departments, the handling department andthe packaging department. During April, the handling department reportedthe following information: ...
- Q This week we were introduced to the \"normal curve,\" also knownas the bell curve. Many human factors are normally distributed, andyour task for this week's discussion is two describe two...
- Q define U=x+y, V=x-y.find the joint and marginal pdf of U and V
- Q Assignment 1Choose any one variable of interest (e.g., cups of coffee) andcollect data from two independent samples (e.g., men vs. women,children vs. adults, college students vs. non-college students,etc.) could make...
- Q Print-O-Matic printing company spends specific amounts on fixedcosts every month. The costs of those fixed costs are in table#3.1.12.a.) Find the mean and median. For median, list the numbers inorder...
- Q State the general relationship between consumption Y anddisposable income X in ( a ) exact linear form and ( b ) stochasticform. ( c ) Why would you expect most...
- Q eBook The College Board reported the following mean scores forthe three parts of the Scholastic Aptitude Test (SAT) (The WorldAlmanac, 2009): Critical Reading 502 Mathematics 515 Writing 494Assume that the...
- Q Lloyd's Cereal company packages cereal in 1 pound boxes (16ounces). A sample of 25 boxes is selected at random from theproduction line every hour, and if the average weight is...
- Q Princess Foods wants to determine if there is a relationship inthe amount a household spends onprepared foods to family size and income.Parthika:Well, we still have data collected from a previous...
- Q Do education programs for preschool childrent that follow theMontessori method perform better than other programs? A studycompared 5-year-old children in Milwaukee, Wisconsin, who had beenenrolled in preschool programds from the...
- Q At a gymnastics meet, three judges evaluate the balance beamperformances of five gymnasts. The judges use a scale of 1 to 10,where 10 is a perfect score. A statistician wants...
- Q I need 5~10 please! thank youScores on the GRE. A college senior who tookthe Graduate Record Examination exam scored 510 on the VerbalReasoning section and 650 on the Quantitative Reasoning...
- Q When engineers design products, it is important to consider theweights of people so that airplanes or elevators aren't overloaded.Based on data from the National Health Survey, we can assume theweight...
- Q A real estate agent would like to know if the number of bedroomsin a house can be used to predict the selling price of the house.More specifically, she wants to...
- Q a) Sketch the area under the standard normal curve over theindicated interval and find the specified area. (Round your answerto four decimal places.)The area to the left ofz = −0.41...
- Q A real estate agent has 12 properties that she shows. She feelsthat there is a 40% chance of selling any one property during aweek. The chance of selling any one...
- Q You wish to test the following claim a significance level of α =0.01 . H o : p = 0.44 H a : p ≠0.44 You obtain a sample...
- Q S.M.A.R.T. test scores are standardized to produce anormal distribution with a mean of 230 and a standard deviation of35. Find the proportion of the population in each of the followingS.M.A.R.T....
- Q A school psychologist wishes to determine whether a newanti-smoking film actually reduces the daily consumption ofcigarettes by teenage smokers. The mean daily cigarette consumptionis calculated for each of eight teenage...
- Q A measure of goodness of fit for the estimated regressionequation is theQuestion 5 options:sample sizemean square due to regressionmean square due to errormultiple coefficient of determination
- Q Statistical process controlexplain the types of control charts available for analysis, thebasis under which their limits are defined and change, the types ofanalysis that lead to decisions of controlled or...
- Q Suppose a geyser has a mean time between eruptions of 62minutes. Let the interval of time between the eruptions be normallydistributed with standard deviation 14 minutes. Complete parts ​(a)through ​(e)...
- Q The textbook basically says that the general addition rule iswhen A and B are two events in a probability experiment. Theprobability that either one of the events will occur is:...
- Q Suppose a client is working on research project for her master’sdegree in nursing. She plans to survey registered nurses (RN’s) inOhio to get their opinions related to the opioid crisis....
- Q 1. The following probability distribution represents the numberof people living in a Household (X), and the probability ofoccurrence (P(X)). Compute the Expected Value (mean), the Varianceand the Standard Deviation for...
- Q At a call center, calls come in at an average rate of four callsper minute. Assume that the time elapsed from one call to the nexthas the exponential distribution, and...
- Q Discuss an example of applying probability to investigatingburglaries . What are some ways you could measure or express thatprobability using the Basic Law of Probability.
- Q a) Average talk time between charges of a cell phone isadvertised as 4.6 hours. Assume that talk time is normallydistributed with a standard deviation of 0.6 hours.Find the probability that...
- Q Suppose that you want to create a portfolio that consists of acorporate bond​ fund, X, and a common stock​ fund, Y. For a​ $1,000investment, the expected return for X is...
- Q If Z is a bernoulli random variable such that point (X,Y) fallswithin unit circle with center (0,0) and given that X & Y areindependent uniform random variables with range [-1,1]...
- Q A study of 90 workers following a new pre-workstretching exercise program was conducted. One of the variablesmeasured over the 4-week study was the increase in number ofminutes worked in an...
- Q Do students reduce study time in classes where they achieve ahigher midterm score? In a Journal of Economic Educationarticle (Winter 2005), Gregory Krohn and Catherine O’Connor studiedstudent effort and performance...
- Q Think about a population mean that you may be interested in andpropose a hypothesis test problem for this parameter. Gatherappropriate data and post your problem, Later, respond to your ownpost...
- Q A shopkeeper hires vacuum cleaners to the general public at 5$per day. The mean daily demand is 2.6. Suppose the demand followsPoisson distribution. (a) Calculate the expected daily income fromthis...
- Q Propose the following items for a pseudo-study:E-LearningResearch Question- Is E-Learning a useful educationtool for adult learnersHypotheses:Null and ResearchVariables (independent and dependent)Levels of MeasurementSample PopulationSample SizeDescriptive Statistics
- Q IQ is normally distributed with a mean of 100 and a standarddeviation of 15. Suppose an individual is randomly chosen. a) Findthe probability that the person has an IQ greater...
- Q An article in Information Security Technical Report [“MaliciousSoftware—Past, Present and Future†(2004, Vol. 9, pp. 6–18)]provided the following data on the top 10 malicious softwareinstances for 2002. The clear leader...
- Q For the decision problem in Figure 6.1, use data tables toperform the following sensitivity analyses. The goal in each is tosee whether decision 1 continues to have the largest EMV....
- Q A researcher was interested in the anxiety present in studentsjust prior to the midterm exam. The research used an anxietyself-quiz to gage the student's anxiety. The score for 30 studentsare:...
- Q 2a) Calculate an average and sample standard deviation for theindependent variable (time of heating) and the dependent variable(number of surviving organisms) given the data in the tablebelow.Time (min) ... Number...
- Q Give an example of a situation when you should perform a pairedT-test and an example of when you should do an unpairedcomparison.
- Q The weight of a small Starbucks coffee is a normally distributedrandom variable with a mean of 385 grams and a standard deviationof 8 grams. Find the weight that corresponds to...
- Q For the following data sets, are the samples positively skewed,negatively skewed or approximately symmetric? (You can use R tojustify your answer.) (a) A ={0.9961905,0.9493184,0.8332006,0.9513567,0.9856061,0.9136707,0.9706223,0.6834221, 0.8527071, 0.8052218, 0.9798628, 0.9862662}. (b) B...
- Q The number of words in the active vocabulary of children of aparticular age is normally distributed with a mean of 3000 and astandard deviation of 500.Use the Normal Curve Table...
- Q Consider these 4 samples potentially drawn from 4 differentpopulations. Sample #1) 25 19 14 21 18 18 19 19 Sample #2) 25 15 2220 15 20 16 20 20 16...
- Q Referring back to the process map that I worked in class thatinvolved “getting to work on timeâ€. Suppose that during theconstruction of that process map, we came up with many...
- Q DO NOT COPY AND PASTE FROM THE WEBSITE!!!! I NEED YOUR OWNWORD!!!Explain the seeming contradiction in the One-Way ANOVA; namely,that the null hypothesis is about comparing the means of three...
- Q what conclusion can be drawn from a study with a nullresult
- Q The average exam score for students enrolled in statisticsclasses at Indiana University Northwest is 80 and grades arenormally distributed. A professor decides to select a random sampleof 25 students from...
- Q A researcher wants to know how many security cameras are onaverage in stores located in a large shopping mall. He randomlyselects a sample of 9 stores and finds that on...
- Q State whether each of the following is always true (T) or notalways true (F).a) If X is a random variable, Corr X, (1/3)X= (1/3).b) If X and Y are independent...
- Q Given the following sample information, test the hypothesis thatthe treatment means are equal at the 0.10 significance level:Treatment 1Treatment 2Treatment 3396263555165385154417564Complete the ANOVA table. (Round the SS, MS, andF values...
- Q More than 100 million people around the world are not gettingenough sleep; the average adult needs between 7.5 and 8 hours ofsleep per night. College students are particularly at risk...
- Q How do you evaluate each of the assumptions of regressionanalysis?
- Q 9. Exercise 4.9In a study of housing demand, the county assessor develops thefollowing regression model to estimate the market value (i.e.,selling price) of residential property within her jurisdiction. Theassessor suspects...
- Q The Excel file BankData shows the values of the followingvariables for randomly selected 93 employees of a large bank. (Avery similar data set was used in a court lawsuit againstdiscrimination.)Â Â Let=...
- Q From 104 of its restaurants, Noodles & Company managerscollected data on per-person sales and the percent of sales due to\"potstickers\" (a popular food item). Both numerical variablesfailed tests for normality,...
- Q In order to investigate if the systolic blood pressuremeasurements vary in standing and lying positions the systolicblood pressure levels of a sample of 12 persons were measured inboth positions (first...
- Q A some association On-Line Discount Broker Survey polls memberson their experiences with discount brokers. As part of the survey,members were asked to rate the quality of the speed of executionwith...
- Q Evaluate and provide example of how hypothesis testing andconfidence interval are used together in healthcare research. Alsoprovide a workplace example that illustrates your ideas.
- Q This question is for my last discussion topic in Math225N -Statistical Reasoning for the Health Sciences at Chamberlain. Werely heavily on statistics and statistical research in the healthand helping professions....
- Q give example related in civil engineering on how touse the concept of normal distribution.
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