Basic Math question and answers for July 24, 2023
- Q The number of letters arriving each day at a residential addressis assumed to be Poisson distributed with mean 1.8. The numbers ofletters arriving on different days are independent randomvariables. (i)...
- Q Discuss the following in 175 words: The concept of mean &standard deviations of probability distributions play a significantrole in managerial decision-making.
- Q Find the mean and the Variance of the following sampledata: xFrequency (f)15264986124
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.In a random sample of 69 professional actors, it was found that...
- Q The college bookstore tells prospective students that theaverage cost of its textbooks is $52 with a standard deviation of$4.50. A group of smart statistics students thinks that the averagecost is...
- Q Complete each problem on a separate worksheet in a single Excelfile. Rename the separate worksheets with the respective problemnumber. You may have to copy and paste the datasets into yourhomework...
- Q 17. A campus program evenly enrolls undergraduate and graduatestudents. If a random sample of 4 students is selected from theprogram to be interviewed about the introduction of a new fast...
- Q Tire lifetime:the lifetime of a certain type of automobiletire(in thousands of moles) is normally distributed with mean u=41and standard deviation o=4 What is the probability that a radonchosen tire has...
- Q Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately ?2 =5.1. Suppose...
- Q Let's focus on the relationship between the average debt indollars at graduation (AveDebt) and the in-state cost per yearafter need-based aid (InCostAid).a) Does a linear relationship between InCost Aid and...
- Q High rent district:the mean monthly rent for a one-bedroomapartment without a doorman in Manhattan is 2544.Assume thestandard deviation is 483.A real estate firm samples 83apartments.Use cumulative distribution table if needed.What...
- Q Around 16% of all ABC college students are declared econmajors. a sample of 75 students is taken.(1) What is the distribution of the proportion of econmajors in your sample? (sampling...
- Q College students are increasingly working while attendingschool. A study was conducted to determine if there is asignificant difference in earnings of male college students andfemale college students during the eight...
- Q In order to estimate the average electricity usage per month, asample of 40 residential customers were selected, and the monthlyelectricity usage was determined using the customers' meterreadings. Assume a population...
- Q In performing a chi-square test of independence, as thedifferences between respective observed and expected frequencies_________, the probability of concluding that the row variable isindependent of the column variable increases.Stay the...
- Q A survey asks a random sample of 1500 adults in Ohio if theysupport an increase in the state sales tax from 5% to 6%, with theadditional revenue going to education....
- Q We are interested in understanding the causes of post-traumaticstress disorder (PTSD) among police officers. We draw a sample of100 officers from an urban police department and collect threepieces of information:a)...
- Q Suppose the probability of an IRS audit is 2.9 percent for U.S.taxpayers who file form 1040 and who earned $100,000 or more.(a) What are the odds that such a taxpayer...
- Q explain what is variation
- Q Question 2: A club has 20 members. Five are seniors, four arejuniors, two are sophomores and nine are freshmen. A. In how manyways can the club select a president, a...
- Q M3_IND1. A furniture cabinet maker produces two types ofcabinets, Classic and Modern, that house and hide LCD TVs. Theresource requirements and profit for the two types of cabinets areshown below.Resource...
- Q Indicate whether each statement represents a conceptualdefinition, part of an operational definition, or a hypothesis?The organizational capacity of nonprofit organizations consistsof their relevance, responsiveness, effectiveness, andresilience?To determine the quality of...
- Q An engineer designed a valve that will regulate water pressureon an automobile engine. The engineer designed the valve such thatit would produce a mean pressure of 7.2 pounds/square inch. It...
- Q A pollster surveys people at a boxing match, asking them if theyhad even struck their spouse. Of the 32 people surveyed, 30 said noand the other 2 did not respond....
- Q According to the Bureau of Transportation? Statistics, 81.9?% ofAmerican Airlines flights were on time in 2017. Assume thispercentage still holds true for American Airlines. For the next44 flights from American?...
- Q ASSIGNMENT 1 · ECON 3060 - 01 Due Date: September 4,20191) The Graduate Management Admission Test (GMAT) is astandardized test used by schools to determine the aptitude ofindividuals who are...
- Q 1. Jade is renovating his bathroom and as part of therenovations a plumber is required to install a new shower. Thebudget for this part of the renovations is $1000. An...
- Q Softsoap is the trade name of Colgate-Palmolive's liquid handsoap and body wash. The company is concerned that the mean weightof their most popular size of Softsoap is not greater than...
- Q Use the following contingency table to complete? (a) and? (b)below.ABCTotal1153045902455055150Total6080100240a. Compute the expected frequencies for each cell.ABC12?(Type integers or? decimals.)b. Compute ?2STAT. is it significant at ?=0.005??Set up the null...
- Q An independent mail delivery service wants to study factors thataffect the daily gas usage of its delivery trucks. Using datacollected from different trucks on various days, a company analystuses a...
- Q When performing a ?2 test for independence in a contingencytable with r rows and c? columns, determine the? upper-tailcritical value of the test statistic in each of the followingcircumstances.a.?=?0.05,r=6?,c=5d.?=?0.01,r=5?,c=6b.?=?0.01,r=3?,c=4e.?=?0.01,r=4?,c=5c.?=?0.01,r=3?,c=6a. The...
- Q A baseball hitter hits a home run about once every 10 times atbat. We are interested in the number of hits before thefirst home run happens.Give the distribution of X...
- Q Write out the sample space for the given experiment. Use thefollowing letters to indicate each choice: M for mushrooms, O forolives, S for shrimp, E for eggs, V for vinaigrette,...
- Q A student surveys some students on campus in the evening andfinds that 16 out of 20 of the students she interviewed are parttime students. She uses the data to estimate...
- Q 3. Use "MLB_Salaries" data in Chapter3.xlsx to answer thefollowing questions. For questions that require Excel, include theappropriate output (copy + paste) along with an explanation. Datadescription: An article in The...
- Q Describe Sampling and samling distributions in businessstatistics in 175 words please type response.
- Q All graphs must be neat and legible (use a straightedge to drawstraight lines). All graphs must be labeled appropriately (asinstructed in class). You do not need to write any completesentences....
- Q An online bookstore predicts that the percentage of collegestudents buying anthropology books online is not equal to 45 %, onaverage. Several of the bookstore’s client universities would liketo know if...
- Q Find the area under the standard normal curve to the left ofz=?0.9
- Q Outof six computer chips,two are defective. If two of the chips are chosen randomly fortesting,compute the probability that both of them are defective.List all the outcomes in the sample space,...
- Q Steps to Complete the Week 6 Lab Find this article in theChamberlain Library. Once you click each link, you will be loggedinto the Library and then click on "PDF Full...
- Q Shelia's measured glucose level one hour after a sugary drinkvaries according to the normal distribution with ?=132?=132 mg/dland ?=10.5?=10.5 mg/dl.What is the level L such that there is probability only...
- Q A random sample of 10 examination papers in a course, which wasgiven or fail basis, showed the following scores. (PAPER NUMBERS)(GRADES) (STATUS) 1 85 Pass 2 87 fail 3 92...
- Q As part of its customer service program, United Airlinesrandomly selected 10 passengers from today's flight from Chicago toTampa at nine in the morning. Each passenger in the sample will beinterviewed...
- Q Do you have a favorite statistical method?Is there a statistical method that you think you will/alreadyuse in your workplace? v
- Q Minimum wage, Part I. Do a majority of US adults believe raisingthe minimum wage will help the economy, or is there a majority whodo not believe this? A Rasmussen Reports...
- Q The R library faraway contains the pimadataset. We will fit a model with test as aresponse and bmi (only) as a predictor to see therelationship between the odds of a...
- Q OBESITYSMOKERALCOHOL - (heavy drinking more than once amonth)Physical Inactivity (during leisure time)%LCIUCI%LCIUCI%LCIUCI%LCIUCIQ1 - least deprived18.2811.6927.4216.7511.1324.4415.349.15324.5747.5632.3263.28Q221.314.9529.4121.1215.0428.8222.4110.6141.2940.2631.4349.76Q32316.1831.6121.6215.9628.5925.3918.6733.5243.0635.8250.6Q423.9916.5833.3826.1717.9736.4621.0711.8634.6250.7940.0261.48Q5 - most deprived28.3621.5736.325.2516.5836.4921.215.727.9943.4835.6551.65I have these numbers and am asked to create a bar chart witherror...
- Q Sheila's doctor is concerned that she may suffer fromgestational diabetes (high blood glucose levels during pregnancy).There is variation both in the actual glucose level and in theblood test that measures...
- Q Let A and B be two subsets of the sample space of an experiment.If P(A) = 0.35, P(B) = 0.55, and P(A ? B) = 0.1, find (i) p(A ?...
- Q Consider the following hypothesis test:H(0): mu ? 10H(a): mu < 10The sample size is 120 and the population standard deviation isassumed known with ? = 5. Use alpha = .05....
- Q Your math professor receives several student emails each day.The probability model shows the number of emails your professorreceives from students in a given day.# student emails012345Probability0.100.100.200.200.300.10How many emails should your...
- Q How do you solve this using R?The file "flow-occ.csv" contains data collected by loopdetectors at a particular location of eastbound Interstate 80 inSacramento, California, from March 14-20, 2003. For each...
- Q Debate if “failing to reject the null” is the same as “acceptingthe null.” Support your position with examples of acceptance orrejection of the null.
- Q We run 9 subjects through our treatment program and then givethem the GR-R (? = 30; ? = 3). They get a mean GR-R score of31.5a) What z score is...
- Q A research center claims that at least 25?% of adults in acertain country think that their taxes will be audited. In a randomsample of600 adults in that country in a...
- Q A university hospital is researching the effects of doctorattractiveness on patient satisfaction. Three doctors wererecruited: a middle aged male and 30 year old male and female. Eachdoctor gave every patient...
- Q I am working with SPSS software. The researchers conducted astudy to determine the following:What is the correlation between students’ age and how manyseconds they were observed washing their hands?What is...
- Q SAT scores have a mean of 1000 and a standard deviation of220.Q18: What is the probability that a random student will scoremore than 1400?Q19: Using the Central Limit Theorem, what...
- Q Use Table V in Appendix A to determine the t-percentilethat is required to construct each of the following two-sidedconfidence intervals. Round the answers to 3 decimal places.(a) Confidence level =...
- Q In class of thirty two, twenty students are to be selected torepresent the class. In how many ways can this be done, if :(a) Paul refuses to represent the class?(b)...
- Q Blood calcium levels are measured in mg/dL. In patients over 30,? = 9.7 mg/dL, and ? = 2.42 mg/dL.a) Give the blood calcium values for the middle 50% ofpatients.b) Give...
- Q For the leopard gecko (Eublepharis macularius), the gender oftheir offspring is determined by the temperature during embryonicdevelopment. Researchers determined that at 31 degrees C, theproportion of males produced is 35%....
- Q Speeding on the I-5. Suppose the distribution of passengervehicle speeds traveling on the Interstate 5 Freeway (I-5) inCalifornia is nearly normal with a mean of 73 miles/hour and astandard deviation...
- Q Calculate the mean, ????,x¯, and standard deviation, ?,s, forthe data set.SampleValue18.01328.01338.01248.02958.01368.025
- Q I don't understand the zero chart when there is more than twonumbers, i.e. z-3.17 & z=2.79=?
- Q An? airline's public relations department says that the airlinerarely loses? passengers' luggage. It further claims that on thoseoccasions when luggage is? lost, 92 % 92% is recovered anddelivered to its...
- Q Consider a generalization of the inventory model of Sec. 3.2 inwhich unfilled orders may be backlogged indefinitely with a cost ofb(u) if u units are backlogged for one period. Assume...
- Q Discuss the appropriate use of correlations statistic in clinicalpractice
- Q 15. An instrument with 20 questions [i.e., a scale of 20variables] was evaluated for internal consistency(reliability).The following is the result: Cronbach's Alpha N of Items0.623 20Please comment about the internal...
- Q Ch4A-7 Johnson Industries received a contract to develop andproduce four high-intensity long-distance receiver/transmitters forcellular telephones. The first took 2,000 labor hours and $39,000worth of purchased and manufactured parts; the second...
- Q Please explain what regression analysis is – include in youranswer a statement about how predictor and criterion variables areused, as well as an explanation of what beta-weights are. Also,please provide...
- Q An investigation of past consumer surveys done by a companyreveals that 2/3 of customers contacted respond to the survey. Themarketing manager wants to do a new survey and plans to...
- Q 5. The table below shows actual temperatures andpredicted temperatures for San Antonio from August 01 through15th.https://www.accuweather.com/en/us/san-antonio-tx/78205/august-weather/351198DayTemperature1100210039949851016100710181029103101031110412104131041410315100a. Decide which variable should be the independentvariable and which should be the dependent variable.b....
- Q Have to answer a lab question on confidence intervals in healthsciences. In using confidence intervals to make a decision or solvea problem in my job (nursing), or a life situation,...
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