Basic Math question and answers for September 13, 2023
- Q ) A researcher recruited 2100 men in his research and followedup every year for 4 years to find out the incidence rate ofrespiratory disease.After 1 year, there was not a...
- Q In an article in the Journal of Management, Joseph Martocchiostudied and estimated the costs of employee absences. Assume aninfinite population. The mean amount of paid time lost during athree-month period...
- Q Choose a population that you would plan to sample or survey.Your discussion board thread title should be "Sampling from______". Some ideas for populations to take a sample from:Mesa studentsSan Diego...
- Q 1.The yearly salary (in thousands of dollars) for a smallcompany are listed below. Find the mode, mean, median andpopulation standard deviation and use the Empirical Rule to find a95% confidence...
- Q A population proportion is 0.4. A sample of size 200 will betaken and the sample proportion p-- will be used to estimate thepopulation proportion. Use z-table.Round your answers to four...
- Q Suppose that the fuel price at a specific gas station consistsof :A fixed government fuel excise of $0.416/LWholesale costs for supplier, which average $0.712/L, with avariance of 0.10.Retail costs (including...
- Q Discuss the applications of ANOVA (One-Way ANOVA, Two-Way ANOVA)and regression techniques in the context of e-commerce firms likeAmazon, Flipkart etc.
- Q Describe:(1)every componentof the equation for calculating a correlationcoefficient; (2) thepurpose of each component; (3) whatkind of data you would use this equation on; and(4)how touse theequation onrawdata.
- Q wo men, A and B, who usually commute to work together decide toconduct an experiment to see whether one route is faster than theother. The men feel that their driving...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.In a marketing survey, a random sample of 1010 supermarket shoppersrevealed that...
- Q Q1. An advertising company collected information from 10Hollywood Movies, including the number of the first year box officereciepts ad the total promotional costs for each movies. They wishto study the...
- Q Locate the results of a recent survey that show at least twovariables in a newspaper, magazine, or internet article. Outlinethe survey data so that your peers can understand the variables...
- Q When purchasing bulk orders of? batteries, a toy manufactureruses this acceptance sampling? plan: Randomly select and test 42batteries and determine whether each is within specifications. Theentire shipment is accepted if...
- Q A college professor claims that the entering class this yearappears to be smarter than entering classes from previous years. Hetests a random sample of 14 of this year's entering students...
- Q State which sampling design should be used in the followingsituations, and justify your reasoning:i. You need to collect statistics on types of softwareapplications used by employees of a company. Separate...
- Q 2. I stand outside the student union and conduct a poll ofpassing students about their favorite fast food place. There are 6response options = McDonald's, Wendy's, Burger King, Taco Bell,Popeye's,...
- Q The length of industrial filters is a quality characteristic ofinterest. Thirty samples,each of size 5, are chosen from theprocess. The data yields an average length of110 mm, with the process...
- Q 1. A medical school claims that more than 28% of its studentsplan to go into general practice. It is found that among a randomsample of 130 of the school's students,...
- Q A college looked at a random sample of students who worked theprevious summer. Use the following information to answer questions 1 - 7.The following data show the average earnings and sample...
- Q 1. Have you ever played rock-paper-scissors (orRochambeau)? It’s considered a “fair game” in that the twoplayers are equally likely to win (like a coin toss). Both playerssimultaneously display one of...
- Q What are the advantages and disadvantages of strip mines vs.underground mines?
- Q Please show in EXCEL how toexpress with function formula.As we discussed during Week 3,researchers decide to ask 4 tie-purchasing customers whether theybought a bow tie or normal tie. According to...
- Q | | a1 | a2 ||----|------|------|| b1 | 0.37 | 0.16 || b2 | 0.23 | ? |1. What is ?(?=?2,?=?2)P(A=a2,B=b2)?2. Observing events from this probability...
- Q -Event time T follows an exponential distribution witha mean of 40-Censoring time Tc follows an exponential distribution with a meanof 25-Generate 500 observations, with censoring flag indicating whethercensoring happened before...
- Q There is one 1$ bill and one 5$ bill in your left pocket andthree 1$ bills in your right pocket. You move one bill from theleft pocket to the right...
- Q For PART B USE A TI 84 AND LIST THE STEPS THAT YOU DID!THANK YOUResearchers want to determine whether all bags of Skittles® havethe same proportion of colors regardless of...
- Q Inthe game of craps, a player (known as the shooter) rolls two fairsix-sided dice. The shooter immediately loses if the sum of thedice is 2, 3, or 12 and immediately...
- Q 1.13. Problem. (Section 3.4) Three black boxes are labeled withRoman numerals I, II and III. • Box I contains four red chips andthree blue chips. • Box II contains two...
- Q Six people of different ages are getting in line to buy coffees.Compute the number of ways they can arrange themselves in line suchthat no three consecutive people are in increasing...
- Q 1.11. Problem. (Sections 2.2-2.4, 3.1) Five cards are drawn froma standard deck of 52 cards.(a) Given that exactly three of the five cards show a heartssuit, calculate the probability that...
- Q 1.14. Problem. (Section 3.4) A public health researcher examinesthe medical records of a group of 937 men who died in 1999 anddiscovers that 210 of the men died from causes...
- Q 1.8. Problem. (Sections 2.2-2.4) Three fair, six-sided dicecolored red, green and blue are rolled. Calculate each of thefollowing probabilities:(a) The probability all three dice show the same face(“triples”).(b) The probability...
- Q In August 2003, 56% of employed adults in the United Statesreported that basic mathematical skills were critical or veryimportant to their job. The supervisor of the job placement officeat a...
- Q Which probability rule would be used to determine theprobability of getting into both your first choice graduate programAND getting an interview at your first choice post-graduation?Solve for the probability of...
- Q A starting lineup in basketball consists of two guards, twoforwards, and a center. (a) A certain college team has on itsroster four centers, four guards, three forwards, and oneindividual (X)...
- Q The effectiveness of antidepressants in treating the eatingdisorder bulimia was examined in the article “Bulimia Treated withImipramine: A Placebo-Controlled Double-Blind Study” (AmericanJournal of Psychology [1983]: 554–558). A group of patientsdiagnosed...
- Q (Hypothetical) In a major national survey of crimevictimization, the researchers found that 17.0% of Americans age 12or older had been a victim of crime. The size of the sample was6,4,00.a)...
- Q Suppose men's heights are normally distributed with mean of 176cm and variance of 25cm^2.A. What proportion of mean are between 172 cm and 178 cmtall?B. Find the minimum ceiling of...
- Q The production of wine is a multibillion-dollar world-wideindustry. In an attempt to develop a model of wine qual-ity asjudged by wine experts, data was collected from red wine variantsof Portuguese...
- Q Height (cm)Measure 1168.00162.80182.40155164.59182.75185.50160.00185.55159.2174167.64191.5175.21161.50159.40175170.50146.50178173.00147.50153157.48Measure 2168.50163.00182.60156164.59183185.49161.00185.62160174170.18192175.54161.50159.90174172.50146.00178174.00147.40154.5158.75Weight (kg)Measure 1116.5746.27140.915955.7980.598.4260.80124.79138136.4281.65124.174.7560.0171.2184.82157.5049.9069.04118.95259.9017869.85Measure 2116.1245.81139.7659.455.7980.3598.5260.70124.96138136.5379.38124.174.7560.5071.1285.28157.0049.4469.04118.95259.9017869.85Palm Width (cm)Measure 18.006.5010.167.107.008.709.537.208.137.49.846.5098.257.628.208.708.267.008.49.357.507.56.80Measure 28.006.8010.187.107.108.809.607.108.137.49.846.7098.117.628.108.708.577.008.459.207.407.57.00Hand Length (cm)Measure 117.1518.2920.3216.5016.4020.1019.6917.7820.0717.917.1517.1019.618.0517.7816.6918.4219.0517.2719.218.1016.0016.715.90Measure 217.2717.7820.3016.5016.3019.9419.7117.7820.5717.817.151719.617.9117.7816.6918.7518.9917.5319.218.4215.9016.815.80Elbow-grip length (cm)Measure 140.6433.5335.5631.7034.0040.0034.2934.7939.3716.2940.9635.5643.232.1131.7533.3438.7438.1030.2335.8837.7832.2033.0033.00Measure 240.0133.5335.5632.2033.6039.6234.5434.2939.1716.2940.6436.0743.231.8931.7533.3439.0137.7830.7335.8837.4732.1032.4032.50Upper arm length (cm)Measure 135.5635.0535.0531.5034.0039.8036.8332.0037.5916.0436.5135.5639.437.5134.2935.7238.3536.3529.9738.140.6431.4035.5030.00Measure 236.8334.2935.3031.5034.5039.6736.4532.2637.4715.7936.8335.0539.636.2333.6535.5637.8536.9929.2138.140.3231.1035.3030.50Hand Grip Strength 2.0” (kg)Measure 145.0020.0048.0014.0019.0052.6028.5812.0049.1514.512122.006131.1218.0033.0063.0095.0018.0030.0046.0029.004237.00Measure 241.0018.0049.0013.0023.0055.5024.9513.0038.551813021.0058.532.2017.0032.0062.0097.0017.0031.5048.0029.004935.00Hand...
- Q We are interested in studying the performance of collegestudents on statistics exams. In anygiven semester, there are hundreds of students taking statistics inthe department of psychology,mathematics, business, or other related...
- Q Greenville Cabinets received a contract to produce speakercabinets for a major speaker manufacturer. The contract calls forthe production of 4,100 bookshelf speakers and 4,900 floor speakersover the next two months,...
- Q 1. Suppose it is known that the IQ scores of a certainpopulation of adults are approxi- mately normally distributed witha standard deviation of 15. A simple random sample of 25...
- Q Twelve sheep were fed a special diet consisting of dried grassand barley for three months. At the end of the period the plasmainsulin concentration (??/??) was determined for each sheep....
- Q Let’s say you have an unfair six-sided die that lands on 2exactly 20% of the time. If you roll this “loaded” die 5 times,what are the odds that you: (a)...
- Q A coin that lands on heads with a probability of p is tossedmultiple times. Each toss is independent. X is the number of headsin the first m tosses and Y...
- Q Brandon wants to find a cheap computer, but he knows thatcomputer prices are extremely skewed, since most computers are veryexpensive. He knows that computer prices have a mean of $1,223...
- Q Statistics questionsIn a Doctor’s office, the average wait time before apatient sees the doctor is normally distributed with mean20minutes. Because of some actions taken at the office, thestandard deviation has...
- Q Which is cheaper: eating out or dining in? The mean cost of aflank steak, broccoli, and rice bought at the grocery store is$13.04. A sample of 100 neighborhood restaurants showed...
- Q Can you tell me the step by step process of how to do this?Provide a substantive response that addresses all areas of theitem below. Your organization has asked you to...
- Q In 2011, when the Gallup organization polled investors, 34%rated gold the best long-term investment. In April of 2013 Gallupsurveyed a random sample of U.S. adults. Respondents were asked toselect the...
- Q 1. Given: A 4-inch cube with all 6 faces painted is cut up into64 1-inch cubes. A cube is picked at random. What is theprobability that (a) It is unpainted:________________________________...
- Q Practice problems 1 – Type of variables1. In the following situations give an example of a parameter and astatistica. Political electionsb. Subaru 2020 Forester vehicles c. RUM studentsd. Puerto Ricans2....
- Q A club with 8 members elects a president, treasurer,and a secretary. How many ways can these positions be filled?the club also forms a xommitee of 4 members, chosen from the...
- Q A person has 5 coins in his pocket. Two have both sides beingheads, one has both sides being tails, and two are normal. Thecoins cannot be distinguished unless one looks...
- Q Suppose a circular disk is divided into n sectors and that youhave ten different colors of paint.Let Sn denote the number of ways you can paint the n sectors, ina...
- Q The maximum temperatures recorded in Houston for the month ofJanuary in 2013 are: 67, 46, 56, 50, 47, 60, 57, 64, 67, 69, 73,75, 72, 45, 42, 52, 63, 62,...
- Q Suppose that the national average for the math portion of theCollege Board's SAT is 513. The College Board periodically rescalesthe test scores such that the standard deviation is approximately75. Answer...
- Q This is a 3 part question but one question(A) Discuss the probability of landing on heads if you flipped acoin 10 times?(B) What is the probability the coin will land...
- Q A theme park owner records the number of times the same kidsfrom two separate age groups ride the newest attraction.Age 13–16TimeAge 17–21Time1111528233337414459596261777388859695106101Using the computational formula, what is the SS, samplevariance,...
- 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 Consider the following data: 5, 0, 1, 3, 6, 3, 7, 11.Find the standard deviation.d) Find the median if 10.9 is added to each datapoint.e) Find the mean if 10.9...
- Q Suppose you have just received a shipment of 27 modems. Althoughyou? don't know? this, 3 of the modems are defective. To determinewhether you will accept the? shipment, you randomly select...
- Q In a debate on altering the traffic system in the city centre,measurement of a number of cars per minutes were taken at twointersections during the hours between 07h00 and 08h00...
- Q Find the percent of the area to the left ofz = ?2.35.
- Q According to a study done by a university? student, theprobability a randomly selected individual will not cover his orher mouth when sneezing is .267Suppose you sit on a bench in...
- Q An 10-bit password is required to access a system. A hackersystematically works through all possible 10-bit patterns. Let ? bethe number of patterns tested until the correct password isfound.(a) Find...
- Q NSA electronics is experimenting with the manufacture of a newtype of transistor that is very difficult to mass produce at anacceptable quality level. Every hour a supervisor takes a randomsample...
- Q The following appeared in the Wall Street Journal, September 16,2019 "Letters to the Editor" that refers to a September 11 articlethat appeared in the Journal. Read the letter reproduced below...
- Q A population consists of the following N=6 scores: 2,4,1,2,7,2a) compute mean and standard deviation for the population b)Findz-score for each score in the population c) Transform the originalpopulation into a...
- Q 5. Arsalaan A., a well-known financial analyst, selected 50consecutive years of U.S. financial markets data at random. For 11of the years, the rate of return for the Dow Jones IndustrialAverage...
- Q Color blindness is the decreased ability to see colors andclearly distinguish different colors of the visible spectrum. It isknown that color blindness affects 11% of the European population.A sample of...
- Q A report states that adults 18- to 24- years-old send andreceive 128 texts every day. Suppose we take a sample of 25- to 34-year-olds to see if their mean number...
- Q 4. For random variable X with unknown variance let S_x^2=49,x?=8,n=25,"and" ?=0.10. Conduct the following tests. Make sure youstate the decision rule and the inference.a) H_0:?<7H_A:??7b) H_0:?>10H_A:??10c) H_0:?=3H_A:??3d) Give a 90%...
- Q b. An investor wants to create a portfolio of three stocks forma set that consists of 5 defense companies, 4 transportationcompanies and 6 healthcare companies. If the investor picks thethree...
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