Basic Math question and answers for July 25, 2023
- Q The margin of error for a multiple comparisons procedure wasdetermined to be 10.5 units. The sample means for the problem were:A: 47.3 B: 22.5 C: 19.5 D: 38.6. Which of...
- Q Please elaborate on the differences and the relationshipsbetween Brownian motion, Wiener process and Levy process, and alsothe characteristics of each.Thank you so much!
- Q The grades of a group of 1000 students in an exam are normallydistributed with a mean of 70 and a standard deviation of 10. Astudent is randomly selected from the...
- Q During the first 13 weeks of the television season, the Saturdayevening 8:00 P.M. to 9:00 P.M. audience proportions were recordedas ABC 29%, CBS 27%, NBC 24%, and independents 20%. A...
- Q The following data represent a company's yearly sales volume andits advertising expenditure over a period of 5 years.(Y) Sales in Advertising (X) Millions of Dollars in($10,000)15 3216 3318 3517 3416...
- Q Use a scatterplot and the linear correlation coefficient r r todetermine whether there is a correlation between the two variables.(Note: Use software, and don't forget to look at the scatterplot!)x...
- Q 45 people are randomly selected and the accuracy of theirwristwatches is checked, with positive errors representing watchesthat are ahead of the correct time and negative errors representingwatches that are behind...
- Q The first significant digit in any number must be? 1, 2,? 3, 4,?5, 6,? 7, 8, or 9. It was discovered that first digits do not occurwith equal frequency. Probabilities...
- Q Income at the architectural firm Spraggins and Yunes for theperiod February to July was as? follows:????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? MonthFebruaryMarchAprilMayJuneJulyIncome? ($000's)90.090.091.591.596.096.085.485.492.292.296.096.0Assume that the initial forecast for February is85.085.0?(in $? thousands) and the initial trend...
- Q The average number of people in a family that received welfarefor various years is given below.YEARWelfare family size19694.019733.619753.219793.019833.019883.019912.9y=88.721+ -0.043xpart d.Find the estimated welfare family size in 1970. (Use yourequation from...
- Q Draw one card with replacement from a well-shuffled standardpoker deck until you draw a spade. Find the probability of each ofthe following:a. You draw only once.b. You draw at least...
- Q 2. If the mean of a distribution is 100 with a standarddeviation of 10, what raw score is associated with a z-score of+2.003.3. Using the z-score formula, if you have...
- Q Rosenberg Land Development (RLD) is a developer of condominiumproperties in the Southwest United States. RLD has recentlyacquired a 40.625 acre site outside Phoenix, Arizona. Zoningrestrictions allow at most 8 units...
- Q SIMPLE LINEAR REGRESSION. For this and the next 3 parts. Thejournal, Fisheries Science (Feb 1995) reported on a study of thevariables that affect endogenous nitrogen excretion (ENE) in carpraised in...
- Q Determine the mean, median, and mode for each of the variables.What is the variance for each set of data for each of thevariables? What is the standard deviation for each...
- Q Read the article below and complete the task athand.LISTERIOSIS OUTBREAK IN SOUTH AFRICA In March 2018, Tiger Brandssuspended operations at its factories in Polokwane, Germiston andPretoria, which the department of...
- Q A student is given 20 multiple choice questions. Each multiplechoice question has 4 options & only one correct answer. Thestudent answers all the questions in a random manner.a) What is...
- Q The probability a telesales represenative making a sale on acustomer call is .15. Find the probability: 1. Her first sale comesafter 5 calls. 2. Her first 5 calls went with...
- Q Define GN to be the game which pays the longest runof heads or tails observed in N flips of a fair coin. LetEN be the expected value of the game...
- Q ( i need Unique answer, don't copy and paste,please) (dont' use handwriting, please).(i need references URL Link)General Question** How to perform logistic regression inSPSS?
- Q Let X represent the standard normal random variable. The P{X> 2.07} is equal to:
- Q You may need to use the appropriate appendix table or technologyto answer this question.A simple random sample of 60 items from a population with? = 6 resulted in a sample...
- Q Rejection RegionAfter reviewing data from a sample, an inference can be madeabout the population. For example,Find a data set on the internet. Some suggested search terms:Free Data Sets, Medical Data...
- Q How could an assignment problem be solved using thetransportation approach? What condition will make thesolution to this problem difficult?Please give a typed answer and focus on the second partof the...
- Q Compute the annual standard deviation of returns for allcountries from 1980 – 1981YearMonthAustraliaCanadaFranceGermanyItaly19807-0.00268890.0546111-0.02041650.03696330.1278857198080.0407999-0.01176270.0244608-0.02300180.0696608198090.0607460.01356790.0113528-0.01902230.14209831980100.0585204-0.02200670.0920545-0.02057310.2766413198011-0.01750110.0490367-0.0163204-0.0030604-0.0968726198012-0.030612-0.074856-0.0757283-0.02109460.001744619811-0.0965194-0.0119725-0.0590439-0.0344340.190496319812-0.0241678-0.03228550.0308526-0.00968640.0908233198130.08162660.04926370.01121110.00996010.035885919814-0.0156632-0.0168862-0.06076070.03501480.101452719815-0.00348590.0154803-0.1894615-0.03720210.053198619816-0.0324157-0.0358805-0.07597040.0361752-0.216495419817-0.1098754-0.055260.1138425-0.0065494-0.09292519818-0.0136848-0.03407050.0249309-0.04620120.131922119819-0.1024419-0.1480877-0.0313814-0.0480223-0.1772388198110-0.0587205-0.0334613-0.0514094-0.015371-0.0518721981110.06836760.07688310.02506030.01864730.0455291198112-0.0010473-0.0444019-0.0153722-0.0308835-0.016512
- Q The dataset Roslyn in the accompanying workbookgives appraised values (In $1000’s) and size (in squarefeet) for thirty houses in the Roslyn neighborhood.a) UseExcel’s Data Analysis ToolPak to produce output for the simplelinear regression,...
- Q Construct the indicated confidence interval for the differencebetween the two population means. Assume that the two samples areindependent simple random samples selected from normallydistributed populations. Also assume that the population...
- Q Data are collected on the relationship between the number ofhours per week practicing a musical instrument and scores on a mathtest. The line of best fit is as follows: ?...
- Q Here is a random sample of the body temperature of 25 youngadults.9696.696.796.99797.197.197.297.397.497.497.797.797.797.897.9989898.298.298.398.398.798.898.9Complete the relative frequency distribution table.Temperature GroupFrequencyRelative FrequencyCumulative96 ? x < 96.4111/2596.41 ? x < 96.8222/2596.82 ? x <...
- Q What is a p-value and how is it used to make a decision aboutthe null hypothesis?How is the p-value related to the test statistic?Explain whether or not rejecting the null...
- Q two randomly assigned groups are compared in a health pilotevaluation project. data down on both groups are assumed to benormally distributed. the mean for the group 1 is 280, with...
- Q In case studies, what do we mean by “operationalizing thevariables”?
- Q A homeowner is travelling overseas long-term and wants to rentout his house. A local management company advises the home-ownerthat average rental income for houses like his in this area, i.e....
- Q 1) A population of values has a normaldistribution with ? = 97.3 and ? = 21.5 .You intend to draw a random sample of size n = 42 .A) Find...
- Q ? 62% of U.S. adults have very little confidence in newspapers.You randomly select 10 U.S. adults. Find the probability that thenumber of U.S. adults who have very little confidence in...
- Q Two companies market new batteries targeted at owners ofpersonal music players. Dura Tunes claims a mean battery life of 11hours, while RockReady advertises 12 hours.a. Explain why you would also...
- Q In Nebraska, the average ACT score is 21.7 with a standarddeviation of 1.1. We collect a random sample of 30 students whotook the exam last year.Part 1: (6 pts)Check the...
- Q An advertisement for A-1 Motor Oil states that in a survey ofauto mechanics across the country, the majority of them use A-1Motor Oil in their own vehicles.a. correlation does not...
- Q 2.51 Cards are drawn from a standard 52-carddeck until an ace is drawn. After each card is drawn, it is putback in the deck and the cards are reshuffled so...
- Q Census data for a city indicate that 64.4?% of the? under-18population is? white, 14.5?% black, 19.5?% Latino, 1.4% ?Asian, and0.2?% other ethnicities. The city points out that of 25,0092police? officers,...
- Q A manufacturing process has two assembly lines, A and B. Supposethat line A produces 60% of the product. and line B produces therest. We are told that 5% of the...
- Q In another case –control study researchers investigated cleftlip with or without cleft palate by smoking status in thoseparticipants who reported consuming folic acid supplements. In thissub-group there were 42 cases...
- Q How would an error in the application of a "treatment" impactthe results of a study....provide an example.
- Q 3.50Passedix is a game of chance played with three fair dice.Players bet whether the sum of the faces shown on the dice will beabove or below ten. During the late...
- Q in 2010, the Maricopa Community College District's enrollmentdata showed the following breakdown of students by ethnicity: 54.9%White; 21.1% Hispanic; 7.9% Black; 4.5% Asian/Pacific Islander;2.9% Native American; 8.8% Other. Information was...
- Q Find the median, quartiles, and make a histogram for thefollowing data.1,3,3,3,3,3,3,4,4,4,4,4,4,5,6,7,7,7,9,10,10,10,11,12,12,13,14,14,14,15,16,17,17,17,17,18,19,19,21,22,23,25,27,27,29,32,35,35,36,45
- Q Answer True or False for the following:1. Chi-square requires assumptions about the shape of thepopulation distribution from which a sample is drawn.2. Goodness of fit refers to how close the...
- Q According to the college board, scores by women on the SAT-Itest were normally distributed with a mean of 998 and standarddeviation of 202. Score by women on the ACT test...
- Q Assume adult IQ scores are normally distributed with a mean of100 and a standard deviation of 15a) What is the probability that a randomly selected adult has anIQ that is...
- Q One thousand cars were stopped at random for a roadside test oftyres and lights: 115 had unroadworthy tyres; and 46 had a lightingfault. These figures include 22 cars with both...
- Q show all work1) The following is a list of prices (in dollars) of birthdaycards found in various drug stores:2.451.200.851.332.252.252.092.991.000.881.422.362.152.851.521.992.380.852.222.75a. Using R find the mean, median, mode, range, variance andstandard deviation...
- Q Describe in 175 words please type response:Describe statistical inference and how it corralates withhypothesis testing for single populations.Describe in 175 words please type response:Describe how decision making is done using...
- Q Using the following sample data; 6, 7, 11, 6, 11, 5, 15, 11,5;Compute the sample standard deviation using either the computingformula or the defining formula.A.3.6B.3.5C.3.4D.3.3
- Q A researcher thinks that listening to classical music reducesanxiety. She measures the anxiety of 10 persons then plays Mozart's"Eine Kleine Nachtmusik". Following that the researcher measurestheir anxiety again. (Note that...
- Q Describe the connection between a correlation and a bivariateregression analysis. In your discussion, specifically note: 1)statistical significance, 2) sign, and 3) use or application.
- Q Professor Fair believes that extra time does not improve gradeson exams. He randomly divided a group of 300 students into twogroups and gave them all the same test. One group...
- Q Many people grab a granola bar for breakfast or for a snack tomake it through the afternoon slump at work. A Kashi GoLean CrispChocolate Caramel bar weights 45 grams. The...
- Q Ineed a copy of organized data in a spreadsheet with rows andcolumns labeled, can anyone help me with this please? I am doing amade up experiment where I see if...
- Q A firm works 5 days a week. Every employee must work exactly 2full days and 3 half-days each week. A half-day can be eithermorning or afternoon, and two half-days cannot...
- Q 12.19. A study of300 male and female employees in two manufacturing plants wasconducted to explore whether there was gender and age gap inself-esteem. The study’s participants were asked to respond...
- Q how can i apply the concept of normal distribution incivil engineering?
- Q An urn contains 6 white and 10 black balls. The figure gives bythe roll of a dice balance indicates the number of balls that will be drawn without delivery of...
- Q Biostatistics with R- Solve the following by evaluating the test statistic and pvalue. Suppose that the population mean of systolic blood pressurein the US is 115. We hypothesize mean systolic...
- Q Dr. Smile is interested in evaluating whether 7-year-oldautistic children differ from the general population of 7-year-oldchildren in their ability to recognize facial expressions. Shedevelops the Facial Recognition Test, which has...
- Q 1, You want to obtain a sample to estimate a populationproportion. At this point in time, you have no reasonable estimatefor the population proportion, so we assume p=.5. You would...
- Q Explain the difference between non-directional and directionalhypotheses, and explain in which circumstances it is important toapply directional hypothesis.Explain why Chi square distributions are positively skewed andwhat is its relationship with...
- Q Department of Labor reported the average hourly earnings forproduction workers to be $15.23 per hour in 2001. A sample of 75production workers during 2003 showed a sample mean of $15.86...
- Q Suppose X and Y are independent random variables with X = 2:8and Y = 3:7. Find X+Y , the standard deviation of X + Y .
- Q The Kroger Company is one of the largest grocery retailers inthe United States, with over 2,000 grocery stores across thecountry. Kroger uses an online customer opinion questionnaire toobtain performance data...
- Q Twenty five high school students complete a preparation programfor taking the SAT test. Here are the SAT scores from the 25students who completed the SAT prep program: 434 694 457...
- Q *tables and figures are listed by page number and areincluded in the table of contents TRUE OR FALSE*WHICH OF THE FOLLOWING IS CORRECT IN TERMS OF APA NUMBERSTYLE?a) 1950's b)...
- Q The following sample observations were randomly selected.(Do not round the intermediate values. Round your answersto 2 decimal places.)X:453610Y:8.758.915.321.5a.Determine the 0.95 confidence interval for the mean predictedwhenX = 5 ( ,...
- Q For the third quarter (Q3) of 2014, a group of 163 mutual fundshad a mean return of 4.6% with a standard deviation of 5.1%. Ahistogram of fund returns shows a...
- Q A family math night at your school includes the followingactivity. A bag is filled with 10 small bears that are identicalexcept that 3 are yellow and 7 blue. The directions...
- Q Did you come across any notable data analysis tools during yourresearch for the activity submission? Share with your fellowclassmates any interesting or useful hardware or software toolsthat you have come...
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