Basic Math question and answers for August 25, 2023
- Q A simple random sample of 60 items from a population of withα=8 resulted in a sample mean of 35.A. Provide a 90% confidence interval for the populationmean.B. Provide a 95%...
- Q A psychologist is interested in constructing a 95% confidenceinterval for the proportion of people who accept the theory that aperson's spirit is no more than the complicated network of neuronsin...
- Q The data in the table represent the weights of various domesticcars and their miles per gallon in the city for the 2008 modelyear. For these​ data, the​ least-squares regression line...
- Q What approaches are there by which coefficients are estimatedfor linear and logistic regression?How is the deviance affected when an explanatory term is omitted(i know that it increases, but surely there...
- Q Calculate the weekly return for BIT and construct a histogramin Excel. Does the data on return rates appear normallydistributed? On the basis of z-scores do you find evidence ofoutliers? Hint:...
- Q Inter State Moving and Storage Company is setting up a controlchart to monitor the proportion of residential moves that result inwritten complaints due to late delivery, lost items, or damageditems....
- Q The accompanying data set provides the closing prices for fourstocks and the stock exchange over 12 days:DateABCDStock Exchange9/3/10127.3718.3421.0315.5110432.459/7/10127.1518.1820.4415.5110334.679/8/10124.9217.8820.5715.8210468.419/9/10127.3517.9520.5216.0210498.619/10/10128.3717.8220.4215.9810563.849/13/10128.3618.6421.1616.2110616.079/14/10128.6118.8321.2916.2210565.839/15/10130.1718.7921.6916.2510627.979/16/10130.3419.1621.7616.3610595.399/17/10129.3718.8221.6916.2610517.999/20/10130.9719.1221.7516.4110661.119/21/10131.1619.0221.5516.5710687.95With the help of the Excel Exponential Smoothing tool, I wasable to forecast...
- Q The method of tree ring dating gave the following years A.D. foran archaeological excavation site. Assume that the population of xvalues has an approximately normal distribution. 1285 1250 11871236 1268...
- Q A randomized controlled experiment has 50 participants, of whom20 are women. A simple random sample of 25 participants areassigned to the treatment group and the remainder to the controlgroup.a) Say...
- Q Overproduction of uric acid in the body can be an indication ofcell breakdown. This may be an advance indication of illness suchas gout, leukemia, or lymphoma.†Over a period of...
- Q When a truckload of apples arrives at a packing​ plant, a randomsample of 175 is selected and examined for​ bruises, discoloration,and other defects. The whole truckload will be rejected if...
- Q Explain the advantages and disadvantages of bar charts and piecharts. Include discussion of the type of data that is best suitedfor each and justify why this is the best form...
- Q You are playing blackjack at a casino and have a hand with atotal of 19. You decide to stay. The dealer flips over theirfacedown card to reveal a total of...
- Q Suppose that National Motors randomly selects a sample of n = 91ZX-900s. The company records the stopping distance of each of theseautomobiles and calculates the mean and standard deviation of...
- Q The ages of commercial aircraft are normally distributed with amean of 13.013.0 years and a standard deviation of 8.11428.1142years. What percentage of individual aircraft have ages between1010 years and 1616...
- Q Situation B: An independently selected sample of five men alsoparticipated in the same study. The table below shows results forthe number of pounds lost by the five men and five...
- Q Using the “Z†table, indicate the values ofZ1 andZ2associated with a95% area under the normal distribution:
- Q Consider a 9 × 9 Sudoku, where each number appears exactly oncein each row andexactly once in each column. Assume that a list of numbers alreadyappear in somecells are given.(a)...
- Q A restaurant chain that has 3 locations in Portland is trying todetermine which of their 3 locations they should keep open on NewYear’s Eve. They survey a random sample of...
- Q Using the Standard Normal Table. What is the probability az-score is between -1.11 and 0.91?In other words, what is P( -1.11 < z < 0.91)?A.0.0479B.0.5186C.0.9521D.0.6851
- Q A city council suspects a judge of being a \"hanging judge\"because s/he is perceived as imposing harsher penalties for thesame sentence. To investigate this, a random sample of 47 cases...
- Q Stratified Sampling and Cluster Sampling are two approaches usedwithin Probability Sampling Techniques.Explain using examples, instances where Stratified Samplingwould be preferred over Cluster Sampling, and vice versa.Remember to cite your source...
- Q Suppose that a bag of scrabble tiles contains 5 Es, 4 As, 3 Nsand 2 Bs. It is my turn and I draw 4 tiles from the bag withoutreplacement. Assume...
- Q A recent National Science Foundation (NSF) survey indicates thatmore than 20% of the staff in American research and developmentlaboratories is foreign. Results of the study have been used forpushing legislation...
- Q An orange juice producer buys only one kind of oranges. Theamount of juice squeezed from each of these oranges isapproximately normally distributed with a mean of 4.2 ounces and apopulation...
- Q In a test of the effectiveness of garlic for lowering​cholesterol, 43 subjects were treated with garlic in a processedtablet form. Cholesterol levels were measured before and after thetreatment. The changes...
- Q What percentage of hospitals provide at least some charity care?Based on a random sample of hospital reports from eastern states,the following information is obtained (units in percentage ofhospitals providing at...
- Q You are interested in knowing whether wealthier people arehappier. You collected data from fifty people about their incomesand their overall happiness levels on a scale of 1 to 10. Uponanalyzing...
- Q consider the linear programming problemmaximize z = x1 +x2subjected tpx1 + 3x2 >= 152x1 + x2 >= 10x1 + 2x2 <=403x1 + x2 <= 60x1 >= 0, x2>= 0solve using...
- Q The Army finds that the head sizes (forehead circumference) ofsoldiers has a normal distribution with a mean of 22.7 inches and astandard deviation of 1.1 inches.Approximately 68% of soldiers have...
- Q 1.14 Let Xn be a Markov chain on state space {1,2,3,4,5} withtransition matrixP=01/21/2000001/54/50002/53/5100001/20001/2(a) Is this chain irreducible? Is itaperiodic?(b) Find the stationary probability vector.
- Q Farmers know that driving heavy equipment on wet soil compressesthe soil and injures future crops. Here are data on the\"penetrability\" of the same type of soil at two levels ofcompression....
- Q simple hypothesis test please be clear withalgorithmThe United States and Japan often engage in intense tradenegotiations. U.S. officials claim that Japanese manufacturersprice their goods higher in Japan than in the...
- Q The CPA Practice Advisor reports that the mean preparation feefor 2017 federal income tax returns was $273. Use this price as thepopulation mean and assume the population standard deviation ofpreparation...
- Q 2. Let X be exponential with rate lambda. What is the pdf of Y =X^0.5? How about Y = X^3? Contrast the complexity of this result totransformation of a discrete...
- Q The management of a business concern will be making a decisionwhether to upgrade their office desktops to Windows 10 from Windows7. However the management wants to see whether the employees...
- Q n a poker hand consisting of 5​ cards, find the probability ofholding​ (a) 2 jacks​; ​(b) 1 diamond and 4 spades.
- Q A statistics professor gave a 5-point quiz to the 50 students inhis class. Scores on the quiz could range from 0 to 5: Thefollowing frequency table resulted: (1.5 points)Quiz Scorefrfcfcrfc%54.08501.00100%410.2046.9696%314.2836.7272%210.2022.4444%18.1612.2424%04.084.088%1....
- Q A die is rolled twice. Find the joint probabilitymass function of X andY if X denotes the value on the first rolland Y denotes the minimum of the values...
- Q suppose that 65% of all registered voters in an area favor acertain policy. Among 225 randomly selected registered voters, findthe following:P(x ≤ 150), the probability that at most 150 favor...
- Q a) What is the probability that a hand of 13 cards contains fourof a kind (e.g., four 5’s, four Kings, four aces, etc.)?b) A single card is randomly drawn from...
- Q Suppose a bank quotes S = $1.1045/€. The annualized risk-freeinterest rates are 4% and 6% in the U.S and Germany, respectively.Find the approximate forward rate for the euro. Do not...
- Q 1)A new chemical has been found to be present in the humanbloodstream, and a medical group would like to study the presenceof this chemical in some samples of patients. The...
- Q At one point the average price of regular unleaded gasolinewas​$3.543.54per gallon. Assume that the standard deviation price per gallonis​$0.080.08per gallon and use​ Chebyshev's inequality to answer thefollowing.​(a) What percentage of...
- Q ________a number that is used to represent a populationcharacteristic and that generally cannot be determined easily________a method for selecting a sample and dividing thepopulation into groups; use simple random sampling...
- Q Number of Police Officers (X) Â Â Number of Crimes(Y)0 Â Â 1020 Â Â 10Â Â 30 Â Â 40a. Calculate the correlation coefficient and the covarianceb. Calculate the regression coefficient of the slope.c....
- Q A mill operator is concerned that bags are not being filled tothe stated 1000g of grain. 20 bags are randomly weighed and resultsrecorded. There is a sign on the machine...
- 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 Describe a scenario where a researcher could use a One-Way ANOVAto answer a research question. Fully describe the scenario and thevariables involved and explain the rationale for your answer. Whyis...
- Q Directions: Use theBivatiate Correlation function and the Options submenu to answereach of the questions based on the above scenario.The superintendent has continued theexamination of data by examining the relationship betweenattendance...
- Q in the statistical analysis section, the authors write:“Post hoc power calculations of our sample size with 107per group was 95% (5% significance) to detect an increasereadmission rate as found in...
- Q 1. You know the true properties of the data so you can answerthe two following questions: (and you do not need to know the Yvalues to answer)Expected value= 0 Variance=...
- Q The shares of the U.S. automobile market held in 1990 by GeneralMotors, Japanese manufacturers, Ford, Chrysler, and othermanufacturers were, respectively, 34%, 32%, 19%, 9%, and 6%.Suppose that a new survey...
- Q Standard deviation is a useful concept in performancemanagement. Let us say that a director in a local fire departmentwants to know any variation between the performance of this yearand that...
- Q A random variable is normally distributed with a mean of 24 anda standard deviation of 6. If an observation is randomly selectedfrom the​ distribution,a. What value will be exceeded 5​%...
- Q An engineer is comparing voltages for two types of batteries (Kand Q) using a sample of 74 type K batteries and a sample of 46type Q batteries. The mean voltage...
- Q A fish story: The mean length of one-year-oldspotted flounder, in millimeters, is 133 with standard deviation of20, and the mean length of two-year-old spotted flounder is 156with a standard deviation...
- Q 1) We are creating a new card game with a new deck.Unlike the normal deck that has 13 ranks (Ace through King) and 4Suits (hearts, diamonds, spades, and clubs), our...
- Q SAVE OUTFILE = ‘\\Client\H$\Desktop\car.sav'.explains what this part does in SPSS
- Q Complete Table 2 by calculating the expected deaths for Indiana(columns a and b) and Alaska (columns a and d) based on thestandard population distribution of the US in 1992. Theage-specific...
- Q A poll is given, showing 75% are in favor of a new buildingproject. If 138 people are chosen at random, answer the following.What is the probability that exactly 103 of...
- Q For the problems 1 -6Consider the data set   16, 26, 31, 32, 32, 32, 42, 47, 47, 47, 50, 50 (already put inincreasing order)Compute the following:1/  The mode:A/ 47     ...
- Q salessqftadv_costinventorydistancedistrict_sizestorecount2311.477.6289710.979.48402321.539.578929.451.154121561.688.375427.960.358411571.3556.735526.855.56168101.331.662423.589.62414101.331.172353.686.898625191.8912.96367018.5108.857565201.88512.02365719.1100.685754371.712.29334517.490.138594871.8612.5332216.5111.284222991.49.86178411.575.606261951.637.2212309.864.24527201.245.234832.455.92911681.513.931144.573.187334281.7811.04282916.4101.192514291.7259.43341015.780.694164641.7212.19287315.8105.25484151.21.172893.280.93731651.476.562923.980.18797661.515.553123.885.89766981.245.792356.490.219753381.653.34116012.1121.988842491.5132.2311849.7115.277121611.46.953997.950.188144671.4613.17206216.1101.211893981.8411.68210315.995.406494971.6812.1127431880.195145281.9410.98377918110.025585291.76511.11391618.9103.2652991.314.357824.8111.732521001.5253.798044.799.74111.454.6811163.485.882503471.6510.08222313.494.181493481.8117.87218012.195.242503411.6410.34149414.370.693285571.6613.55352218.594.329435081.69811.53352116.799.91750In the “HomeSales†dataset, the response variable,sales, depends on six potential predictor variables,sq_ft, adv_cost, inventory, distance,district_size, and storecount. Fit four simple linearregression (SLR) models corresponding to the four predictors,sq_ft, adv_cost,...
- Q Let X ~ N(196; 19). Find:(a) P(X </= 223)(b) P(143 < X < 206)(c)Â Â P(|X-196|> 30)
- Q telephone calls arrive at an exchange have a poisson distributionat an average rate of one every second. Find the probabilities ofthe following;a. no calls arriving in a given five-second periodb....
- Q For this discussion, comment on any programming errors youencountered.Did the same issues keep recurring?
- Q In this problem, we explore the effect on the standard deviationof multiplying each data value in a data set by the same constant.Consider the data set 11, 9, 4, 6,...
- Q According to recent studies, 57.6% of American citizens areoverweight. Suppose that 17% of those who are overweight arechildren. If American citizen is randomly selected, determine thefollowing probabilities:a) Selected citizen is...
- Q QUESTION SEVEN a) A cigarette manufacturingfirm distributes two brands of cigarettes. Two random samples areselected and it is found that 56 of 200 smokers prefer brand Α andthat 29 of...
- Q The City Council wants to gather input from residents about therecreational opportunities in the city. Categorize each techniqueas simple random sample, stratified sample, systematic sample,cluster sample, or convenience sample.a) Get...
- Q Stem 3, 2, 1, 0   Leaf 177, 3444, 4699, 089a. How many observations were in the originaldata​ set?b. In the bottom row of the​ stem-and-leafdisplay, identify the​ stem, the​...
- Q Do bonds reduce the overall risk of an investment portfolio? Letx be a random variable representing annual percent return forVanguard Total Stock Index (all stocks). Let y be a random...
- Q We are creating a new card game with a new deck. Unlikethe normal deck that has 13 ranks (Ace through King) and 4 Suits(hearts, diamonds, spades, and clubs), our deck...
- Q According to a Yale program on climate change communicationsurvey, 71% of Americans think global warming is happening.†(a)For a sample of 16 Americans, what is the probability that atleast 13 believe...
- Q Specialty Toys, Inc. sells a variety of new and innovativechildren’s toys. Management learned that the preholiday season isthe best time to introduce a new toy, because many families usethis time...
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