Basic Math question and answers for September 30, 2023
- Q A study was conducted of recent high school graduates who beganfull-time jobs rather than going to college. We wish to find theaverage starting income µ of such workers. A random...
- Q Answer following:After several studies, professor smith concludes that there is azero correlation between body weight and bad tempers. This meansthatA traffic safety officer conducted an experiment to determinewhether there is...
- Q 1. The daily temperature in August in a region is normallydistributed with a mean of 86 degrees F and a standard deviation of4 degrees F. What is the probability (4...
- Q Describe how simple linear regression analysis andmultiple regression are used to support areas of industry research,academic research, and scientific research.
- Q Consider a sample with data values of 26, 24, 23, 18, 31, 35,29, and 24. Compute the range, interquartile range, variance, andstandard deviation
- Q In a lottery 5 different numbers are chosen from the first 90positive integers.(a) How many possible outcomes are there? (An outcome is anunordered sample of five numbers.)(b) How many outcomes...
- Q You manage an ice cream factory that makes two flavors: CreamyVanilla and Continental Mocha. Into each quart of Creamy Vanilla go2 eggs and 3 cups of cream. Into each quart...
- Q As reported in "Runner's World" magazine, the times of thefinishers in the New York City 10 km run are normally distributedwith a mean of 61 minutes and a standard deviation...
- Q Probability theory and the binomial expansion show that, wereyou to sample families consisting of four children 1/16 of thesefamilies would consist of 4 boys, 4/16 would consist of 3 boys...
- Q A simple random sample of 400 individuals provides 100 Yesresponses.a. What is the point estimate of the proportion of thepopulation that would provide Yes responses? (to 2 decimals)later use p--...
- Q Question 1:Some people are more susceptible to hypnosis than others. Peoplewho are highly suggestible have a vivid imagination and fantasylife. This has led researchers to hypothesize that the ability torecall...
- Q Wayne Collier designed an experiment to measure thefuel efficiency of his family car under different tirepressures.For each run, he set the tire pressure and then measured themiles he drove on...
- Q The World Health Organization (WHO) keeps track of how manyincidents of leprosy there are in the world. Using the WHO regionsand the World Banks income groups, onc can sask if...
- Q A sample of 30 diabetic women was taken at a health center, andthe age at which the disease appeared was recorded, as shown in thetableXiyearsXiyearsXiyearsXiyearsXiyears13664612501844243925274113531953254035584314412055264446195215402151274654810551644223828536561140173723402955Get the following probability distributionP <...
- Q In how many ways can 2 men, 4 women, 3 boys, and 3 girls beselected from 6 men, 8 women, 4 boys and 5 girls if a particularman and woman...
- Q Allele frequency is the relative frequency of a certain alleletype among a certain population. Suppose that within a certainarea, the allele frequency of A, B and O are 0.2, 0.1,...
- Q What is the level measurement of the following OperationalDefinitions. i.e., Nominal, Ordinal or Interval level data?1 The unemployment rates of the 50 states.2 The region of country in which people...
- Q A survey reported that 37% of people plan to spend more oneating out after they retire. Ifeight people are randomly? selected, determine the valuesbelow.a.The expected number of people who plan...
- Q Let x be a random variable that represents the pH ofarterial plasma (i.e., acidity of the blood). For healthy adults,the mean of the x distribution is ? = 7.4.† A...
- Q Consider the quarterly electricity production for years 1-4:Year 1 2 3 4 Q1 99 120 139 160 Q2 88 108 127 148 Q3 93 111 131 150Q4 111 130 152...
- Q The service time in minutes from admit to discharge for tenpatients seeking care in a hospital emergency department are 21,136, 185, 156, 3, 16, 48, 28, 100, and 12.Use Minitab...
- Q 2. A University has completed an internal survey on itsdepartment achievements. The key question in the survey is whetherthe professors think the new on-line system is effective. Thefollowing is the...
- Q A scientist has read that the mean birth weight ? of babies bornat full term is 7.3 pounds. The scientist, believing that the meanbirth weight of babies born at full...
- Q 68 % of students at a school weight between 54 kg and 86 kg.Assuming this data is normally distributed, what are the mean andstandard deviation?
- Q Evaluate some background research on the various methods oflinear and multiple regression techniques. Then discuss inscholarly detail using examples researched or based on lifeexperiences how linear and multiple regression techniques...
- Q Assume that the last two digits on a car number plate areequally likely to be any of the 100 outcomes{00, 01, 02, ........98, 99}. Peter bets Paul, at even money,...
- Q In Craps once the point is set, the shooter continues to rollthe dice until either the point comes up (in which case the shooterwins) or a 7 comes up (in...
- Q Anystate Auto Insurance Company took a random sample of 376insurance claims paid out during a 1-year period. The average claimpaid was $1600. Assume ? = $262.Find a 0.90 confidence interval...
- Q A newsgroup is interested in constructing a 90% confidenceinterval for the proportion of all americans who are in favor of anew green initiative. Of the 560 randomly selected Americanssurveyed, 392...
- Q How will each of the following affect the individualdemand curve for the flu vaccine?Left Shift, Right Shift, or No effect for the individualdemand curve for the flu vaccine? An increase in...
- Q Suppose two independent random samples of sizes n1 = 9 and n2 =7 that have been taken from two normally distributed populationshaving variances ?12 and ?22 give sample variances of...
- Q The number of chocolate chips in a bag of chocolate chip cookiesis approximately normally distributed with a mean of 1262 chips anda standard deviation of 118 chips. ?(a) Determine the...
- Q Lemington’sis trying to determine how many Jean Hudson dressesto order for the spring season. Demand for the dresses is assumedto follow a normal distribution with mean of 400 and standarddeviation...
- Q The probability the adult used tobacco products is 0.300.The probability the adult binge drank alcohol is 0.384.The probability the adult drank any alcohol is 0.571.The probability the adult used tobacco...
- Q 1) You buy a lottery ticket to a lottery that costs $10 perticket. There are only 100 tickets available to be sold in thislottery. In this lottery there are one...
- Q Choose ONE of the random variables from the options provided ineach part. (a) Confirm the essential properties of the probabilityfunction for the binomial or Poisson or geometric random variable.[5 marks]...
- Q Random sample of size n=19 is taken from a Normal population,sample mean is 11.5895, standard deviation is 1.0883.1. At the 2% level, test whether it is reasonable to believethat the...
- Q Explain the differences between a sample and a population, andoffer example (s) to further illustrate your explanation
- Q 2) A random sample of 10 miniature Tootsie Rolls was taken froma bag. Each piece was weighed on a very accurate scale. The resultsin grams were:3.087 3.131 3.241 3.241 3.270...
- Q A supermarket chain analyzed data on sales of aparticular brand of snack crackerat 104 stores for a certain one week period. The analystdecided to build a regresion model to predict...
- Q Answer the following questions and use Excel or this document toshow your work.1. Consider the following results for two samples randomly takenfrom two normal populations with equal variances.Sample ISample IISample...
- Q This is an extension of the Birthday Problem. Suppose you have500 Facebook friends. Make the same assumptions here as in theBirthday Problem.a) Write a program in R to estimate the...
- Q The length of industrial filters is a quality characteristic ofinterest. Thirty samples,each of size 5, are chosen from the process. The data yields anaverage length of110 mm, with the process...
- Q Discuss the three properties (characteristics) of data andexplain some of the descriptive measures associated with eachproperty.
- Q Use the data given inthe table to answer the following questions. The data representsthe average number of miles that a salesperson travels in a dayverses the number of sales made...
- Q The mean waiting time at the drive-through of a fast-foodrestaurant from the time an order is placed to the time the orderis received is 84.3 seconds. A manager devises a...
- Q A supermarket chain analyzed data on sales of aparticular brand of snack crackerat 104 stores for a certain one week period. The analystdecided to build a regresion model to predict...
- Q Appraise what new statistical methods are used in the evaluationof conceptual theories outlining specific advantages these methodsprovide. Compare Structural Equation Modeling (SEM) techniquesproviding advantages of using SEM to other conventional...
- Q Choose the correct answer.1. What is the percentile rank of 60 in the distribution ofN(60, 100)?a. 10b. 50c. 60d. 100The skewness value for a set of data is +2.75. This...
- Q An academic department has just completed voting by secretballot for a department head. The ballot box contains four slipswith votes for candidate A and three slips with votes for candidateB....
- Q what is the average age in the class? what is the averagefeeling? what is the average city?32Cedar Rapids324CedarRapids334Marion423Coralville224IowaCity035Solon026Waterloo331Marion320Marion232CedarRapids330CedarRapids434CedarRapids226CedarFalls347CedarRapids-331CedarRapids329Coralville029NorthLiberty033NorthLiberty244CedarRapids340Williamsburg340CedarRapids231Marion128CedarRapids028Robins326CedarRapids427Marion348Solon122Wever235Marion327CedarRapids327Dubuque338Riverside-127CenterPoint028CenterPoint227CedarFalls326CedarRapids124IowaCity254IowaCity225CedarRapids026NorthLiberty127Dubuque225Dubuque226NorthLiberty527CedarRapids024CedarFalls230NorthLiberty124CedarRapids024Waterloo226NorthLiberty527CedarRapids025CedarRapids426CedarRapids324Coralville324CedarRapids331Marion-3
- Q Let X be a uniform random variable with pdf f(x) = ?e??x for x> 0, and cumulative distribution function F(x).(a) Show that F(x) = 1?e ??x for x > 0,...
- Q Quantitative studies can be designed in many ways. Pleaseexplain the differences between and among the following:a) experimental, quasi-experimental, and pre-experimentalstudies (be sure to discuss the concept and usage of a...
- Q Western Family Steakhouse offers a variety of low-cost meals andquick service. Other than management, the steakhouse operates withtwo full-time employees who work 8 hours per day. The rest of theemployees...
- Q Data were collected on the top 1,000 financial advisers. CompanyA had 239 people on the list and another company, Company B, had121 people on the list. A sample of 16...
- Q The Company collected a sample of the salaries of itsemployees. There are 70 salary data points summarized in thefrequency distribution below:SalaryNumber of Employees5,001–10,000810,001–15,0001215,001–20,0002020,001–25,0001725,001–30,00013Find the standard deviation.Find the variance.
- Q The wait times (in seconds) for fast food service at two burgercompanies were recorded for quality assurance. Using the sampledata below, find the following for each sample:RangeStandard deviationVarianceLastly, compare the...
- Q 67% of adults age 55 or older want to reach their 100thbirthday. You randomly select 8 adults age 55 years or older andask them if they want to reach their...
- Q A forester studying the effects of fertilization on certain pineforests in the Southeast is interested in estimating the averagediameters of pine trees. In studying diameters of similar trees formany years,...
- Q what are the characteristics of a research question
- Q Problem#5: The Birthday Problem (10pts) In your classroom thereare 45 students, assume that none of them is born on February 29,and hence consider only common years (365 days) [do not...
- Q The lengths of a professor's classes has a continuous uniformdistribution between 50.0 min and 52.0 min. If one such class israndomly selected, find the probability that the class length isbetween...
- Q A researcher plans to do an experiment in the college settingconcerning the effects of class size on attendance in a first yearlaw course. He has four levels of size, namely,...
- Q AM -vs- PM Test Scores: In my AM section ofstatistics there are 22 students. The scores of Test 1 are given inthe table below. The results are ordered lowest to...
- Q A well-known company manufactures combination locks. Theirretractable cable lock works well for securing sports equipment(skis, bikes, golf equipment, etc.) as well as duffel or sportsbags. A five-digit (0–9) dial combination...
- Q SAS code please.Two cholesterol-lowing medications (statins) and a placebo weregiven to each of 10 volunteers with total cholesterol; readings of240 or higher. After 6 weeks, the flowing total cholesterol valueswere...
- Q Consider the quarterly electricity production for years 1-4:Year 1 2 3 4Q1 99 120 139 160Q2 88 108 127 148Q3 93 111 131 150Q4 111 130 152 170(a) Using a classical additive decomposition, calculate theseasonal component.(b) Explain...
- Q In a poll of 1000 randomly selected prospective voters in alocal election, 281 voters were in favor of a school bondmeasure.a. What is the sample proportion? Type as: #.###b. What...
- Q An experimenter is investigating the effects of noise on theperformance of a tracking task. The task is to use a mouse to keepa cursor on a computer screen on a...
- Q Identify if population parament or sample statistic:Is statement population parameter or sample statistic? If,parameter, then identify population and parameter. If sample, then,what is population, sample, and statistic?A) North Carolina State’s...
- Q Define.(a) Descriptive statistics(b)Inferential Statistics(c)Nominal Data(d) Ordinal data(e)Standard deviation
- Q The manufacturers of Good-O use two different types of machinesto fill their 25 kg packs of dried dog food. On the basis of randomsamples of size 15 and 18 from...
- Q Econ 2310Business Statistics: Problem Set #1Instructions: You may use Excel and/or a calculator tocomplete this assignment. Please show work or reference what Excelcommands you used to solve the problems.You are...
- Q Suppose it is known that the IQ scores of a certain populationof adults are approxi- mately normally distributed with a standarddeviation of 15. A simple random sample of 25 adults...
- Q Suppose that the antenna lengths of woodlice are approximatelynormally distributed with a mean of 0.2 inches and a standarddeviation of 0.05 inches. What proportion of woodlice have antennalengths that are...
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