Statistics question and answers for July 18, 2023
- Q A study was made on the amount of converted sugar in a certainprocess at various temperatures. The data were coded and recordedas follows:TemperatureConverted Sugar1.08.11.17.81.28.51.39.81.49.51.58.91.68.61.710.21.89.31.99.22.010.5Estimate the linear regression line.Estimate the mean...
- Q A United Nations report shows the mean family income for Mexicanmigrants to the United States is $28,120 per year. A FLOC (FarmLabor Organizing Committee) evaluation of 27 Mexican family unitsreveals...
- Q In a study of cell phone use and brain hemispheric dominance, aninternet survey was emailed to 2601 subjects randomly selected froman online group involved with ears. 975 surveys were returned.Construct...
- Q A small dairy wants to make sure that their butter mill isproducing bricks of butter that do not differ from the labelledweight by too much. The machine produces 30 bricks...
- Q Assume a normal distribution for each question.(a) What proportion of the distribution consists of z-scoresgreater than 0.25? (b) What is the probability of obtaining a z-score less than0.50? (c) What...
- Q Suppose a batch ofmetal shafts produced in a manufacturing company have a standarddeviation of 1.4 and a mean diameter of 212 inches.If 80 shafts aresampled at random from the batch,...
- Q Two cards are drawn at random from a standard deck of 52 cards.The number of aces drawn is counted. Prepare a probabilitydistribution for this random experiment. Hint: Find theprobability that...
- Q The following table presents data on wine consumption (in litersper person per year) and death rate from heart attacks (in deathsper 100,000 people per year) in 19 developed Western countries.CountryAlcohol...
- Q a) Explain intuitively why denseness is a desirable property ofa sample set in sampling-based planning.b) Explain intuitively why we want a low dispersion sample setin sampling-based planning.
- Q Suppose U.S. consumers 21 years and older consumed 26.2 gallonsof beer and cider per person during 2017. A distributor inMilwaukee believes that beer and cider consumption are higher inthat city....
- Q 2. Suppose we have the hypothesis testH0 : µ = 200Ha : µ > 200in which the random variable X is N(µ, 10000). Let the criticalregion C = {x :...
- Q Identify the appropriate statistical test for each researchdescription:Single-sample z-testSingle-samplet-testIndependent samples t-testRelated samples t-test (repeated measures or matchedsamples)CorrelationA researcher investigates whether single people who own pets aregenerally happier than singles without...
- Q QUESTION 1Solve the problem.A bank's loan officer rates applicants for credit. The ratings arenormally distributed with a mean of 200 and a standard deviation of50. If 40 different applicants are...
- Q dentify the appropriate statistical test for each researchdescription:Single-sample z-testSingle-samplet-testIndependent samples t-testRelated samples t-test (repeated measures or matchedsamples)CorrelationAn office manager wants to know if there’s a gender differencein punctuality. Over the...
- Q Q1.Explain what happens to the 95 % confidence interval as thesample size increases. Explain what happens to the width of the confidence intervalfor a 99% interval versus a 95%. Q2....
- Q a. We are testing H0: μ1 - μ2 =0. Our 95% confidence interval is (-27.01,-7.5).We should expect the t-statistic to be  ---Select---greater than 2 between 0 and 2 between 0 and...
- Q An investment company knows that the rates of return on itsportfolios have a mean of 7.45 percent, with a standard deviationof 3.82 percent. The company selects a sample of 144...
- Q Remember to SHOW ALL YOUR WORK, and INCLUDE ALL STEPS forhypothesis tests.1. A sociologist is investigating the relationship between lifesatisfaction and sociability. For a sample of 16 individuals, thefollowing data...
- Q A die is tossed 600 times. H0 is the hypothesis that theproportion of tosses showing aces is binomially distributed withmean 1/6. Find the upper limit of the region for which...
- Q The following three independent random samples are obtained fromthree normally distributed populations with equal variances. Thedependent variable is starting hourly wage, and the groups are thetypes of position (internship, co-op,...
- Q 1) You are interested in testing if there is a difference inweight-loss between 3 popular diet types; low calorie, low fat andlow carb. Participants are randomly assigned one of the...
- Q A tire manufacturer produces tires that have a mean life of atleast 30000 miles when the production process is working properly.The operations manager stops the production process if there isevidence...
- Q PLEASE EXPLAIN. THANK YOU!DataActivity1. A random sample of36 skeletal remains from females was taken from data stored in theForensic Anthropology Data Bank (FDB) at the University ofTennessee. The femur lengths...
- Q The following three independent random samples are obtained fromthree normally distributed populations with equal variance. Thedependent variable is starting hourly wage, and the groups are thetypes of position (internship, co-op,...
- Q 1)Â Â Background: Data on infantmortality mortality (measured as deaths per 1,000 under 1 year old)was collected by the United Nations Educational, Scientific, andCultural Organization (UNESCO) for the 1990 Demographic Year Bookand...
- Q Anecdotal evidence has suggested that a specific type of oralcontraceptive pill puts women at greater risk for blood clots.Researchers decide to examine this scientifically by starting aprospective cohort study. They...
- Q Because of the relatively high interest rates, most consumersattempt to pay off their credit card bills promptly. However, thisis not always possible. An analysis of the amount of interest paidmonthly...
- Q A chef is opening a new restaurant in Portland. Oregon. andwants to know how many vegan meals he should prepare. 300 peoplewill attend opening night. He knows that about 4%...
- Q sas questionsWhat options would you specify to direct a proc print statementto print only observations 5 through 10?How do you get the last word of a text string? Write a...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.The National Council of Small Businesses is interested in theproportion of small...
- Q 1. Identify which test the scenario will use:independent samples t test, paired samples t test, chi square testfor goodness of fit, chi square test for independence or chi squaretest for...
- Q Jan523.9Feb510.23March545.65April514.23May550.71June505.34July525.34August600Sept.569.42October500.2Novem.533.12December507.11What percentage of your bills are within two standard deviationsof the mean?
- Q anutritionist claims that the standard deviation of the number pfcalories in 1 tablespoon of thr major brands of pancake surup is45. A sample of major brands of pancakes syrup is...
- Q Grades and AM/PM Section of Stats: There weretwo large sections of statistics this term at State College, an8:00 (AM) section and a 1:30 (PM) section. The final grades forboth sections...
- Q Wait-Times (Raw Data, Software Required):There are three registers at the local grocery store. I suspect themean wait-times for the registers are different. The sample data isdepicted below. It gives the...
- Q The production of a nationally marketed detergent results incertain workers receiving prolonged exposures to a Bacillussubtilis enzyme. Nineteen workers were tested to determine theeffects of those exposures, if any, on...
- Q The Oman National Grid Company ventures to a new project in thesouthern part of the Sultanate which is a 250-kilometer, 132kilovolts transmission lines. The company has to choose between anOverhead...
- Q Win/Loss and With/Without Joe: Joe playsbasketball for the Wildcats and missed some of the season due to aninjury. The win/loss record with and without Joe is summarized inthe contingency table...
- Q Hoping to lure more shoppers​ downtown, a city builds a newpublic parking garage in the central business district. The cityplans to pay for the structure through parking fees. For a...
- Q May I have the answers for the following questions step by stepplease.Annual sales, in millions of euros, for 21 pharmaceuticalcompanies follow.         8408             1374             1872             8879             2459             11413           60814138 6452 1850 2818 1356 1049874784019 4341 739 2127...
- Q Which Data Set should you run a post-hoc T-test on? Think aboutwhat an ANOVA can tell us and what can't an ANOVA tell us?Group of answer choicesData Set BData Set...
- Q You are visiting an orchard with 6 different varieties of fruit:Pears, Bananas, Kiwis, Limes, Nectarines, and Dates.They only have 8 pears left but they have an unlimited supply ofthe other...
- Q Supplier 1Supplier 292.050291.120496.020286.840483.980270.410478.550277.010496.490283.9104107.880261.450490.710270.710496.110284.430486.230263.190484.080269.930493.1202103.740480.470282.120479.020293.980494.060272.7204100.060258.180473.890273.540483.690274.780482.620284.140490.110285.560469.490262.420494.870273.260481.550294.350481.480287.410488.950290.030497.620275.810488.950289.880482.620279.630473.930263.830477.280282.240469.770273.040465.150288.980494.620278.360471.690298.370481.930271.240473.200261.770477.570297.760464.250277.740483.070282.310460.280260.520481.790279.350462.880266.310491.140278.260494.2302106.630485.860275.830494.360294.010484.030281.740489.040283.480485.030290.870476.880287.040472.340275.7504a) What is the lower limit of the 95% confidence interval? Giveyour answer to three decimal places.b) What is the upper limit of the 95% confidence interval? Giveyour...
- Q Q1) Construct IPO chart that calculate grade of someone. Workingbackwards by beginning with deciding the output should the gradebe. Â
- Q Research Paradigms: Different kinds of researchrequire different types of paradigms. Identify three types ofresearch and the appropriate paradigm for each.
- Q The relationship between the amount of remaining carbon monoxide(CO) in an individual’s lungs and the time since that person lastsmoked a cigarette can be summarized using a linear regressionapproach.Write down...
- Q A cereal company has claimed that one serving of their cerealhas on average 120 calories with a standard deviation of 12calories.  You decide to test their claims and examine 10different recommended...
- Q QUESTION 5 [4]A courier service company has found that their delivery time ofparcels to clients is approximately normally distributed with amean delivery time of 30 minutes and a variance of...
- Q a) The design specifications for a small PVC liner for aconstruction project calls for a thickness of 3.0 mm  0.1 mm. Thestandard deviation of the process is 0.02 mm....
- Q 10 brands of vanilla yogurt and found these numbers of caloriesper serving:130 160 150 120 110 170 160 110 130 90- Check the assumptions and conditions for inference.-Create a 95%...
- Q Consider the following statements.(i). If we are testing for the difference between two populationmeans, it is assumed that the sample observations from onepopulation are independent of the sample observations from...
- Q 1.We are interested in conducting a study in order to determinewhat percentage of voters of a state would vote for the incumbentgovernor. What is the minimum size sample needed to...
- Q A customer service department asks its customers to rate their​over-the-phone service on a scale of​ 1-20 immediately after theirservice has been completed. The department then matches each​customer's rating with the...
- Q suppose you will perform a test to determine whether there issufficient evidence to support a claim of a linear correlationbetween two variables. Find the critical values of r given numberof...
- Q 1) Using the Binomial Distribution formula find theprobability that a family that has 13    children  has 10 girls.2)   Given the paired data set below ofSuper Models ( heights and weights) to...
- Q Let X and Y be independent Poisson random variables withparameters 1 and 2, respectively, computeP(X=1 and Y=2)P(X+Y>=2)Find Poisson approximations to the probabilities of thefollowing events in 500 independent trails with...
- Q The true average diameter of ball bearings of a certain type issupposed to be 0.5 inch.What conclusion is appropriate when testing H0: μ =0.5 versus Ha: μ ≠0.5 inch...
- Q Health researchers believe that theneonatal mortality rate is higher at home (MRH) than that in thehealth centers (MRC). The neonatal mortality rates (both MRH andMRC) for 20 countries are recorded...
- Q A computer operations department decided to study the effect ofthe connection media used (either cable or fiber). The teamdesigned a study in which a total of 30 subscribers were chosen.The...
- Q The null hypothesis and the alternate hypothesis are:H0: The frequencies are equal.H1: The frequencies are not equal.Categoryf0A10B30C30D10State the decision rule, using the 0.05 significance level.(Round your answer to 3 decimal...
- Q The dataset HomesForSaleCA contains a randomsample of 30 houses for sale in California. Suppose that we areinterested in predicting the Size (in thousands of squarefeet) for such homes.State Price...
- Q Using the raw data from each trial perform a T-testcomparing results from one variable group to another variable ( 6hrvs overnight ) and determine the p-value for the comparison. Reportwhether...
- Q You want to rent an unfurnished one-bedroom apartment indowntown San Diego next year. The mean monthly rent for a randomsample of 100 apartments advertised on Craigslist is $1800. Assumea population...
- Q The heights of adult men in America are normally distributed,with a mean of 69.5 inches and a standard deviation of 2.65 inches.The heights of adult women in America are also...
- Q Chloe plans to invest some of her savings into two blue-chipstocks, namely Stock A and Stock B. Suppose that the mean andstandard deviation of the annual return of Stock A...
- Q 13. The National Institutes of Health funded a study of a randomsample of 856 people age 71 and older in the United States. Theyfound that 9.7% of these people suffer...
- Q what type of questions can be answered by followinganalysis...?Chi squaret testanovamanovaancovamancovapath analysis
- Q SE Appliances manufacturers refrigerators in Richmond,Charlotte, and Atlanta. Refrigerators then must be shipped to meetdemand in Washington, New York, and Miami. The table below liststhe shipping costs, supply, and demand...
- Q Prove the following equivalences without using truth tables, andspecify at each step of your proof the equivalence law you areusing.(a) ¬ (p ∨ (¬ p ∧ q)) ≡ ¬ p...
- Q Suppose that a person plays a game in which he draws a ball froma box of 10 balls numbered 0 through 9. He then puts the ball backand continue to...
- Q 3.17 You and I play a tennis match. It is deuce, which means ifyou win thenext two rallies, you win the game; if I win both rallies, I winthe game;...
- Q Suppose the heights of adult women follow a normal distributionwith a mean of 65.5 inches and a standard deviation of 2.75 inches.Determine the following:1.) What percent of adult women are...
- Q In a random sample of 26 ​people, the mean commute time to workwas 30.7 minutes and the standard deviation was 7.2 minutes. Assumethe population is normally distributed and use a​...
- Q According to the National Bureau of Economic Research, thelengths of business cycles from 1919 to 1995, measured from troughto trough (a trough is the low point) in months, were 61...
- Q 7. A political group randomly samples 60 potential voters togauge the proportion of voters who favor a certain legislativeissue. Assume the true proportion of voters who favor the issue is75%....
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