Basic Math question and answers for September 12, 2023
- Q The blood platelet counts of a group of women have a?bell-shaped distribution with a mean of 261.7 and a standarddeviation of 65.5. ?(All units are 1000 ?cells/mu?L.) Using theempirical? rule,...
- Q Researchers collected data to examine the relationship betweenpollutants and preterm births in Southern California. During thestudy air pollution levels were measured by air quality monitoringstations. Specifically, levels of carbon monoxide...
- Q Assume that the two samples are from a normal population. Pleaseperform a t test for the differences in sample averages, indicatingwhether it is significant to 95% confidence (0.05 significance)using one...
- Q I have figured them all out except DOn average, commuters in Phoenix, Arizona, area requirem= 40.0 minutes to get to work. Assume thetimes to get to work are normallydistributed with astandard...
- Q I need to time series plot the following data. I am confusedsince there are multiple sections (441, 442, 443, 444, 445, 452,4521. This is just two years worth of the...
- Q Iron-deficiency anemia is the most common form of malnutritionin developing countries, affecting about 50% of children and womenand 25% of men. Iron pots for cooking foods had traditionally beenused in...
- Q How can one of the attributes control charts (p,np, c or u) could be used to stabilizethe process? Can you please give an example of a process from aquality perspective?
- Q Suppose that, on average, electricians earn approximately ? =54, 000 dollars per year in the United States. Assume that thedistribution for electricians' yearly earnings is normallydistributed and that the standard...
- Q Consider the following data on distances traveled by 100 peopleto visit the local park.distancefrequency1-8309-162517-242525-321033-4010Expand and construct the table adding columns for relativefrequency and cumulative relative frequency. Then plot Histogram,Frequency Polygon...
- Q Calculate the value for the marked cell(?).Risk of coronary death, by number of cigarettes smoked per day,for 1,416 employed middle-aged men: ChicagoWestern Electric study, 22-year follow-up.No. Cigarettes smoked per dayNo....
- Q This is an introduction to social science researchmethods course:Imagine you’re planning to estimate the price of the averagebook at your college bookstore.The bookstore carries 13,000 titles, but you plan to...
- Q Last year, 45% of business owners gave a holiday gift to theiremployees. A survey of business owners conducted this yearindicates that 35% plan to provide a holiday gift to theiremployees....
- Q Please explain your work. Thanks.Compute the probability of each of the following poker handsoccurring (poker hand = 5 cards dealt out of a regular 52-carddeck, the order does not matter)....
- Q Let x represent the dollar amount spent on supermarketimpulse buying in a 10-minute (unplanned) shopping interval. Basedon a certain article, the mean of the x distribution isabout $39 and the...
- Q The Fairfax County Economic Development Authority is concernedthat increasing traffic congestion in the county is deterring newbusiness from moving to the area. A sample of 49 commuters inFairfax County were...
- Q Discuss what are some of the possible "lurking variables" thatmay exist from the below scenario.A correlation was found between high blood pressure and cancerrates. (People with high blood pressure were...
- Q X ? NBD(r, p). Derive the var(X).
- Q QUESTION 6. Z is a standard normal variable. Find the value of Zin the following. (12 points)2 Points eacha. The area to the left of Z is 0.8554b. The area...
- Q Which of the following is not a drawback to a longitudinalstudy?The data can establish a pattern over an extended period oftime.Over time, the participants can change in ways that can...
- Q A professor in a graduate course wants to form a team of threestudents to represent the class at a national case competition? Ofthe 20 students in the class, 5 have...
- Q A defective car has a probability of 2/3 upon turning on theignition in each attempt. Assume attemptsare independent.• (a) What is the probability that exactly 3 attempts are neededuntil the...
- Q A marketing researcher wants to estimate the mean amount spentper year? ($) on a web site by membership member shoppers. Supposea random sample of 100 membership member shoppers who recently...
- Q You would like to study the height of students at youruniversity. Suppose the average for all university students is 68inches with a SD of 20 inches, and that you take...
- Q Safeco company produces two types of? chainsaws: The Safecut andthe Safecut Deluxe. The Safecut model requires 2 hours to assembleand 1 hour to? paint, and the Deluxe model requires 4...
- Q 1. A company is testing how different compensationplans might affect a salespersons performance. The company takes asample of 100 sales representatives and puts 50 on compensationplan “A” and the other...
- Q You have 120 mice lacking insulin receptors in their braintissue. On average 15.2% of these types of mice will die within amonth. What is the probability at least 100 mice...
- Q Do larger universities tend to have more property crime?University crime statistics are affected by a variety of factors.The surrounding community, accessibility given to outside visitors,and many other factors influence crime...
- Q At one hospital there is some concern about the high turnover ofnurses. A survey was done to determine how long (in months) nurseshad been in their current positions. The responses...
- Q QUESTion 6The association between the variables "golf score" and "golf skill"would bea.POSITIVEb.NEGATIVEc.NEITHERQUESTION 7If the correlation coefficient for a lnear regression is 0.987.there is sufficient evidence that a linear relationship existsbetween...
- Q calculate the range for the expected true mean temperature with95% confidence (2-sided confidence interval)calculate the value the true mean temperature should be greaterthan with 95% confidence (1-sided confidence interval)What is...
- Q True or false1.T or F:A numerical variable is continuous if it’s possiblevalues correspond to isolated pointson the number line.2.T or F:A control group provides a baseline for comparison witha treatment...
- Q Epsilon Airlines services predominately the eastern andsoutheastern United States. A vast majority of Epsilon’s customersmake reservations through Epsilon’s website, but a small percentageof customers make reservations via phone. Epsilon employscall-center...
- Q An urn contains 10 balls numbered 1 through 10. Five balls aredrawn at random and without replacement. Let A be the event that“Exactly two odd-numbered balls are drawn and they...
- Q What does regression analysis test?A) Relationship between variablesB) Prediction of one variable based on another variableC) Differences between variablesD) Slope of the regression line
- Q Y is a Binomial random variable where, Y = The number of days ina week someone goes to the gym.Where a week has 7 days and the probability of someone...
- Q Dana Rand owns a catering company that prepares banquets andparties for both individual and business functions throughout theyear. Rand’s business is seasonal, with a heavy schedule during thesummer months and...
- Q Choose the most appropriate statistic for measuring spread forthe following data sets.a.) A medical survey asks for patients' body fat percentages.Most people in the study had body fat percentages in...
- 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 Let ? and ? be two independent uniform randomvariables such that??????(0,1) and??????(0,1).A) Using the convolution formula, find the pdf??(?) of the random variable?=?+?, and graph it.B) What is the moment...
- Q Describe what it means that your statistical analysis wasstatistically significant at the p-value of .05? What does thisreally mean
- Q A sociologist wants to know about the stress levels in thenation over the past years. In the late 2000s, the average score onthe Brown's Stress Inventory (BSI) in the nation...
- Q The closing price of Schnur Sporting Goods Inc. common stock isuniformly distributed between $18 and $32 per share.What is the probability that the stock price will be:a. More than $29...
- Q DISCUSSION BOARD FORUM 1/PROJECT 2 INSTRUCTIONS StandardDeviation and Outliers Thread:For this assignment, you will use the Project 2 ExcelSpreadsheet to answer the questions below. In each question, usethe spreadsheet to...
- Q A doctor has scheduled two appointments, one at 1pm and theother at 1:30pm. The amount of time the doctor spends with thepatient is a constant 20 minutes plus a random...
- Q Quality Air Conditioning manufactures three home airconditioners: an economy model, a standard model, and a deluxemodel. The profits per unit are $67, $95, and $133, respectively.The production requirements per unit...
- Q Suppose approximately 80% of all marketing personnel areextroverts, whereas about 70% of all computer programmers areintroverts. (For each answer, enter a number. Round your answers tothree decimal places.) (a) At...
- Q For this assignment,use data from W1 Assignment.Compute at-test comparing males' and females' heights. You mustdetermine which type of t-test to compute.Move your output intoa Microsoft Word document and write a...
- Q Suppose that T (? 0) is a continuous random variable. Let itspdf, cdf, survival function, hazard rate function, and cumulativehazard rate function be f(t), F(t), s(t), h(t), and H(t),respectively. Note...
- Q SexIndustrial EngineeringMechanical EngineeringElectrival EngineeringCivil EngineeringTotalMale1567230Female1043623Total2510108531.) Based on your answers on part a and d, are sex and collegemajor of students in this class independent? Provide a mathematicalargument? (Problem A asked...
- Q Consider the data in the file Growth.csvwhichcontains data on average growth rates over 1960-1995 for 65countries, along with variables that are potentially related togrowth. A complete description of the data...
- Q The director of the IRS has been flooded with complaints thatpeople must wait more than 45 minutes before seeing an IRSrepresentative. To determine the validity of these complaints, theIRS randomly...
- Q 2. Battery Level of Laptop Computers in Shipment A computermanufacturer ships laptop computers with the batteries fullycharged so that customers can begin to use their purchases rightout of the box....
- Q 3. Discuss why a researcher needs to be concerned about thesurvey response rate. What are the implications of a survey havinga low response rate?
- Q A box contains eight chips numbered 1 through 8. You randomlyselect three at random withoutreplacement.(a) What is the probability that the largest chip selected ischip number 5?(b) What is the...
- Q 2. Think of an example of a research question that would beappropriate for using quantitative or qualitative data. How arethey similar and how are they different?
- Q Given the data set A = {5, 4, 6, 14, 2, 2, 11, 4, 5, 8, 3, 1,12, 15, 13}, which is the data of a sample taken from a...
- Q In a test of the quality of two television commercials, eachcommercial was shown in a separate test area six times over aone-week period. The following week a telephone survey wasconducted...
- Q A Gallup Poll showed that 44% of Americans are satisfied withthe way things are going in the United States. Suppose a sample of25 Americans are selected. Based on this information,...
- Q (1) Consider a normal distribution with mean 38 and standarddeviation 3. What is the probability a value selected at randomfrom this distribution is greater than 38? (Round your answer totwo...
- Q Adam tabulated the values for the average speeds on each day ofhis road trip as 60.5, 63.2, 54.7, 51.6, 72.3, 70.7, 67.2, and 65.4mph he wishes to construct a 98%...
- Q Our event of interest is whether a defective chip is found in aset of chips, and let Y be the number of chips that must be sampleduntil a defective one...
- Q You may need to use the appropriate appendix table or technologyto answer this question.A simple random sample of 60 items resulted in a sample mean of90. The population standard deviation...
- Q For the year 2009, the table below gives the percent of peopleliving below the poverty line in the 26 states east of theMississippi River. Answer the following questions based on...
- Q This investigation will involve measuring how highpeople can jump. Use of tools, such as tape measures and rulers,should be considered.1. Collect data.2. Calculate the means and the five-number summaries for...
- Q You may believe that the population proportion of adults in theUS who own SUVs is 0.25. Your data is that you surveyed peopleleaving work at the end of the day...
- Q Researchers watched groups of dolphins off the coast of Irelandin 1998 to determine what activities the dolphins partake in atcertain times of the day. The numbers in the Table below...
- Q (1 point) (NOTE: You will be limited to no more than 4 attemptsfor credit for this problems.)Rework problem 13 from section 3.2 of your text, involvingExample 3.9, with the changes...
- Q An exam has 8 multiple choice questions. Each question has 4possible answers, only one of which is correct. If a student takesthis exam and answers all questions at random, what...
- Q Assume that you are planning to have a party at your house. Youreally would like to have the party outside in the sun, but thereis a chance that it might...
- Q Suppose that an investigation of the association between regularphysical activity and ovarian cancer revealed that the incidencerate of ovarian cancer among women who engaged in regular physicalactivity was 30 per...
- Q Describe why hypothesis testing is important to businesses?
- Q Cigarettes/DayDeath Rate/1000/Year due to CHFMalesDeath Rate/1000/Year due to CHFFemales00.010.0081-140.270.1115-241.231.1525+2.001.50Your team would like to calculate the attributable risk orattributable proportion of CHF death rates due to smoking 1-14 and15-24 cigarettes per...
- Q Two critics rate the service at six award-winning restaurants ona continuous 0 to 10 scale. Their rankings are shown in the tablebelow. Restaurant 1 2 3 4 5 6 Critic...
- Q HealthyAOAUD10.829.3210.718.7310.568.4610.498.4610.308.429.498.239.328.129.258.099.207.979.087.829.067.059.026.638.988.778.778.728.608.458.408.047.927.937.876.471. Assume that the mean adjusted hippocampal volume for healthyadolescents is 9.01 cubic centimeters. State the hypotheses to testwhether the AOAUD mean hippocampal volume is less thanthis value.To perform the...
- Q Determine the margin of error for a confidence interval toestimate the population mean with n=18 and s=12.1 for theconfidence levels below.A) The margin of error for an 80% confidence intervalis:B)...
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