Statistics question and answers for August 18, 2023
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.†Suppose a small group of 19Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q Text Book: Introduction to Probability Models 11th edition,Sheldon M. Ross: Chapter 5, Question 42(b)Can you please explain how the expression in b was derived andwhich theorem (or provide page #...
- Q When do you use Chi-squared test with Yates correction versuswithout Yates correction?
- Q You wish to test the following claim (HaHa) at a significancelevel of α=0.001α=0.001.      Ho:μ=88.9      Ha:μ>88.9You believe the population is normally distributed, but you do notknow the standard deviation. You obtain a sample...
- Q A pediatrician wants to determine the relation that may existbetween a​ child's height and head circumference. She randomlyselects 5 children and measures their height and headcircumference. The data are summarized...
- Q c. Taking every 20th passenger in your sorted table, create anew table that lists Passenger ID and Rating for the 20 data pointsyou will now have (In excel please) with...
- Q In the study, the authors state the following: “Becauseventilator-free days and days free of multiple organ dysfunctionsyndromes are known to have a bimodal distribution, the data wereinitially analyzed by means...
- Q Consider the following sequence of numbers:0.120.010.230.280.890.310.640.280.830.930.990.150.330.350.910.410.600.270.750.880.680.490.050.430.950.580.190.360.690.87Test whether the 3rd, 8th, 13th, and so on, numbers in thesequence given above auto correlated. (Use α = 0.05)
- Q You measure 33 textbooks' weights, and find they have a meanweight of 53 ounces. Assume the population standard deviation is9.1 ounces. Based on this, construct a 99% confidence interval forthe...
- Q 5 In a certain northern Wisconsin town (cough...cough...Oliver),there are 100 families. 30 families have 1 child, 50 families have2 children, and 20 families have 3 children. The children are thenranked...
- Q Tom is trying to enter the used car business. He knows thatJean-Ralphio will sell him a car that needs repairs. Once repaired,Tom can sell it for $100 more than he...
- Q Random samples of employees in fast-food restaurants where theemployer provides a training program were drawn. Of a sample of 67employees who had not completed high school, 11 had participated ina...
- Q 18 teams, 5 of which are professional, take part in a footballtournament. At the beginning of the tournament the 18 teams arerandomly divided into two groups (A and B) of...
- Q A total of 8 neutrinos, presumably from Supernova 1987A, asobserved in an underground detector located in a salt mine nearCleveland.(a) If the average number of \"background\" neutrinos observed perday is...
- Q The manufacturer of hardness testing equipment uses​ steel-ballindenters to penetrate metal that is being tested.​ However, themanufacturer thinks it would be better to use a diamond indenter sothat all types...
- Q Can you please explain how s could e true or false?It is okay to violate the assumption of independent errors aslong as the data are normally distributed.Thank you! ?
- Q 4.6/16. Many newspapers carry a certain puzzle in which thereader must unscramble letters to form words. How many ways can theletters of COUYPC be​ arranged? Identify the correct​ unscrambling,then determine...
- Q Please write in detail neatly. Kindly don't use any symbols andshortcut words. Please write the formula appropriately. Thequestion is:Consider an unbiased 4-sided die where the sides are numbered 1,2, 3,...
- Q sume that a procedure yields a binomial distribution withnequals4 trials and a probability of success of pequals0.40. Use abinomial probability table to find the probability that the numberof successes x...
- Q 2. Data for the average cost of a major remodeling job nearly 20years ago in 11 selected US cities were captured and are shownbelow: City Average Cost Atlanta, GA $20,427...
- Q a) Submit a copy of your dataset along with a file thatcontains your answers to all of the following questions.b) What the mean and StandardDeviation (SD) of the Close column...
- Q Problem 3: [5 pts.]Inorder to investigate if the systolic blood pressure measurementsvary in standing and lying positions the systolic blood pressurelevels of sample of 12 persons were measured in both...
- Q Problem 2: [5 pts.]Health researchers believe that the neonatal mortality rate ishigher at home (MRH) than that in the health centers (MRC). Theneonatal mortality rates (both MRH and MRC) for...
- Q An important application of regression analysis in accounting isin the estimation of cost. By collecting data on volume and costand using the least squares method to develop an estimatedregression equation...
- Q Make a histogram using the data belowWhat type of probability do these represent ?THUMBS UP!Colors  RED 17GREEN 19  BLUE 28   YELLOW 22ORANGE 21  BROWN 7  TOTALS 114RED 15%GREEN      17%BLUE 25%YELLOW...
- Q Problem 4: [6 pts.] Blood fat content may be influenced by many factors including age and weight. A nutritionist collected data on blood fat content, age and weight from sample...
- Q The following is sample information. Test the hypothesis thatthe treatment means are equal. Use the 0.05 significance level.Treatment 1Treatment 2Treatment 334863103861078Question: Complete the ANOVA table.(Round the SS, MS, and F...
- Q When and how do we split stems for a stem and leaf plot?
- Q We considered the mean waiting time at the drive-through of afast-food restaurant. In addition to concern about the amount oftime cars spend in the drive-through, the manager is also worriedabout...
- Q Suppose that a committee of 12 people is selected in a randommanner from a group of 100 people. Determine the probability thattwo particular people A and B will both be...
- Q The following are the ages of a group of tourists visiting TheLibrary of Congress:36, 38, 33, 44, 37, 37, 38, 34, 34,36, 34, 40, 42, 41, 35, 48, 31, 33,...
- Q 4. Data were collected on student teachers relative to their useof certain teaching strategies that had been presented to them inpreservice education. There were 28 student teachers who hadlearned to...
- Q What is the difference between a statistic and a parameter?
- Q In a distribution, X=75, and standard deviation=5. if z=3 is themaximum z score value of a data value in the distribution, and z=-2is the minimum z score value of data...
- Q The height of women ages 18 to 24 are approxiametly bell shapedwith X=64.5 inches and S=2.5 inches. according to the empiricalrule, approximately what percentage of the women's height would youexpect...
- Q Show all of your work. No credit will be given if there is nowork. Simplify if possible, unless noted.Setup:• Suppose the probability of a part being manufactured byMachine A is...
- Q In Excel, the RAND function generates random numbers between 0and 1compute the expectation and Standard deviation.Hintsa = 0 , b = 1P(x1<= X <= x2) = F(x2) - F(x1)
- Q Dr. Harmon expected that her neurotic patients would comesignificantly earlier to all scheduled appointments compared toother patients, and planned to run a one-tailed test to see iftheir arrival times were...
- Q Normal (or Gaussian) distributions are widely used in practicebecause many sets of observations follow a bell-shaped curve. Instatistics, the normal distribution is one of the main assumptionsin statistical inferences, such...
- Q You are given the sample mean and the population standarddeviation. Use this information to construct the​ 90% and​ 95%confidence intervals for the population mean. Interpret the resultsand compare the widths...
- Q Isthere any relationship between SCAL (Specil Core Analysis) andsaturation distribution? Explain how and give examples?Please answer the question based on reliable citations orresearches.
- Q Suppose you toss a fair coin 10 times.(a) Calculate the probability of getting at least 6 heads, usingthe exact distribution.(b) Now repeat the calculate above, but approximate theprobability using a...
- Q Scores of an IQ test have a​ bell-shapeddistribution with a mean of 100 and a standard deviation of 20.Use the empirical rule to determine the following:​(a) What percentage of people has...
- Q An engineer has carefully measured the spacing betweenanchor bolts (in mm) as:19  23  21  2119  13  26  1530  30  17  2420  16  24  20Find:a. The 90 percent CI for µb....
- Q OptiJet Airlines provide daily service for commuters travelingfrom South to MidWest. One of the fare classes for this flight hasbeen set at $250. The airline has set aside a capacity...
- Q Describe the difference between standard deviation andstandard error.
- Q What is the purpose of two confidence intervals and please give anexample
- Q In what follows use any of the following tests/procedures:Regression, confidence intervals, one-sided t-test, or two-sidedt-test. All the procedures should be done with 5% P-value or 95%confidence interval. Open Brain data....
- Q Let Y = ex where X isnormally distributed with μ = 1.2 and σ = 0.5.Compute the following values. [You may find it useful toreference the z table.]a. Compute P(Y...
- Q Suppose μ1 and μ2 are true mean, for An experiment resulted inthe following data:System 1: m = 6, Xbar= 115.7, s1= 5.03;System 2: n = 6, Ybar=129.3, s2= 5.38.Use the...
- Q CHAPTER 2-32.14A construction job is comprised of two tasks, which we will call''task A\" and \"task B.\" The two tasks are initiated simultaneouslyand their completion times are uncertain. The entire...
- Q An engineer has carefully measured the spacing betweenanchor bolts (in mm) as:19  23   21   2119  13   26   1530   30  17   2420  16   24   20Find:a. The 90 percent CI for µb....
- Q A random variable X is exponentially distributed with amean of 0.21.a-1. What is the rate parameter λ?(Round your answer to 3 decimal places.)a-2. What is the standard deviation of X?(Round...
- Q CHAPTER 2-4Exercise 2.24In this exercise, we examine the effect of combining investmentswith positively correlated risks, negatively correlated risks, anduncorrelated risks. A firm is considering a portfolio of assets.The portfolio is...
- Q Maggie Vitteta, single, works 30 hours per week at $14 an hour.How much is taken out for federal income tax with one withholdingexemption? (Assume the overtime for each employee is...
- Q A consumer preference study compares the effects of threedifferent bottle designs (A, B, and C) on sales of a popular fabricsoftener. A completely randomized design is employed. Specifically,15 supermarkets of...
- Q The Social Security Administration increased the taxable wagebase from $107,200 to $109,100. The 6.2% tax rate is unchanged. JoeBurns earned over $120,000 each of the past two years. a. What...
- Q If μ = 100, σ = 12, and n = 16, then use the t distribution toevaluate the probability ?̅ exceeds 103? Express your answer as apercentage with 3 decimals.
- Q As a systems analyst you are leading a project to identifyimprovements for the current R-ADT system. The primary uses of thesystem include patient scheduling, patient admitting, HIM, casemanagement, and nursing.Explain...
- Q Please answer the following questions,1- Explain a problem/question related to your work2- make up a fictional data set with the variables that you'llneed to answer your question or solve your...
- Q Asingle card is drawb from a standard 52-card deck. What is theprobability that the card is eithera) a seven, or an eight, or a ten?b) a heart, or a club,...
- Q Use the sample data and confidence level given below to completeparts​ (a) through​ (d). A research institute poll askedrespondents if they felt vulnerable to identity theft. In the​poll, n equals...
- Q How to calculate the P(A|B) of a 8 sided die that isrolled one time?Event A occurs whenever a less than 2 is rolled. EventB occurs whenever an even number is...
- Q IQ tests are sometimes used to assess children’s cognitiveabilities. However, typical IQ tests draw on reading skills,whichmay translate into lower scores for dyslexic children.Nonverbal IQ tests should circumvent this issue,...
- Q There was a certain class in which students had completed thework load assigned was very heavy. The instructor knew that theamount learned was directly related to that work load. Theinstructor...
- Q Using R StudioUse the two iid samples. (You can copy and paste the code intoR). They both come from the same normal distribution.X = c(-0.06, 1.930, 0.608 -0.133,0.657, -1.284, 0.166,...
- Q Find the expected count and the contribution to the chi-squarestatistic for the (Group 1, Yes) cell in the two-way table below.Yes No Group 1 711 263 Group 2 1159 313...
- Q 9.13Using the SHHS data in Table 2.10,fit all possible multipleregression models (without interactions) that predict the yvariable serum total cholesterol from diastolic bloodpressure,systolic blood pressure,alcohol,carbon monoxide andcotinine. Scrutinize your results...
- Q Raw scores on behavioral tests are often transformed for easiercomparison. A test of reading ability has mean 55 and standarddeviation 5 when given to third graders. Sixth graders have meanscore...
- Q Question 1: You will receive a prize if both afair coin lands \"heads\" AND a fair die lands \"6\". After the coin isflipped and the die is rolled you ask...
- Q The community bank survey asked about net income and reportedthe percent change in net income between the first half of lastyear and the first half of this year. The mean...
- Q The administrators of the city's Stormwater Program areinterested in evaluating the public's knowledge of the causes andeffects of stormwater pollution. They set up an information boothat the city's Earth Day...
- Q We assume that our wages will increase as we gain experience andbecome more valuable to our employers. Wages also increase becauseof inflation. By examining a sample of employees at a...
- Q As part of the study on ongoing fright symptoms due to exposureto horror movies at a young age, the following table was presentedto describe the lasting impact these movies have...
- Q Questions 13 – 16 refer to the following:The ages of a sample of eight commercial planes which anairline uses at O’Hare Field are:15, 18, 22, 3, 15, 21, 12, 1414....
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