Basic Math question and answers for August 20, 2023
- Q The Hillsboro Aquatic Centre has an indoor pool with lanes forlap swimming and an open area for recreational swimming and variousexercise and water aerobics programs. From 1 June to mid-August...
- Q Two equal groups of seedlings, and equal in height, wereselected for an experiment. One group of seedlings was fedFertilizer A, and the other group with Fertilizer B. The meanheights of...
- Q The medical community unanimously agrees on the health benefitsof regular exercise, but are adults listening? During each of thepast 15 years, a polling organization has surveyed americans abouttheir exercise habits....
- Q (Problems 1.19, 1.23 and 2.4. from KNN) The director ofadmissions of a small college selected 120 students at random fromthe new freshman class in a study to determine whether a...
- Q Name if the following are discrete or continuous variables.Also name if the scenario is ratio, ordinal, nominal, orinterval  The different heights of children in a fourth-grade class-The divisions of the American...
- Q apply statistical methods and analysis. Unless otherwise stated,use 5% (.05) as your alpha level (cutoff for statisticalsignificance).#1. What information does a correlation coefficient convey?#2. State whether each of the following...
- Q What is the BEST statistical method to use when you want toassess the association between a variable that is in ordinal scaleand multiple variables that are in ratio/interval/ordinalscale.
- Q Section 1Tennis players often spin a racquet to decide who serves first.Th e spun racquet can land with the manufacturer’s label facing upor down. A reasonable question to investigate is...
- Q The following require calculating the probability of thespecified event based on an assumed probability distribution.Remember to consider whether the event involves discrete orcontinuous variables.You are measuring height of vegetation in...
- Q Quality Air Conditioning manufactures three home airconditioners: an economy model, a standard model, and a deluxemodel. The profits per unit are $61, $99, and $135, respectively.The production requirements per unit...
- Q Suppose that nn independent trials are performed, with trial iibeing a success with probability 1/(2i+1).12i1. Let PnPndenote theprobability that the total number of successes that result is anodd number.1.Find Pn...
- Q The manufacturer of a portable music player (PMP) has shown thatthe average life of the product is 72 months with a standarddeviation of 12 months. The manufacturer is considering using...
- Q Suppose that 47% of all Americans have flown in an airplane atleast once and that 28% of all Americans have ridden on a train atleast once.What is the probability that...
- Q There are six blue balls and four red balls in thepocket. Take out a ball at random, check the color and put it backin the pocket.1. If you take the...
- Q A paper studied various aspects of bus service and presenteddata on travel times from several different routes. Theaccompanying frequency distribution is for bus travel times fromorigin to destination on one...
- Q Section 3.4 Measures of Position andOutliersYou Explain it – Percentiles &Quartiles:The 5thpercentile of the weight of males 36 monthsof age is 12.0 kg.The 95thpercentile of the length of newborn femalesis...
- Q From each description, identify or infer the target population,the sampling frame, the unit of analysis, and the type of sample.Discuss whether the sampling strategy will allow the researcher toform inferences...
- Q I have three errands to take care of in the AdministrationBuilding. Let  Xi = the timethat it takes for the ith errand(i = 1, 2, 3),and let X4 = thetotal time...
- Q Suppose we know that the average height of Americans is 176cmwith standard deviation of 6cm; and that the average height ofAustralians is 181cm with standard deviation of 8cm. Suppose in...
- Q R programmingBabies born in the US have birth weights that are approximatelynormally distributed with mean 3.339 kg and standard deviation0.573 kg.Using R, determine:a) What fraction of babies are more than...
- Q Researchers selected a simple random sample of 4048 medicalrecords of adults diagnosed with gum disease. In all, 2226 werecurrent smokers, 891 were former smokers, and 931 never smokedregularly. Their research...
- Q For a new study conducted by a fitness magazine,240females were randomly selected. For each, the mean daily calorieconsumption was calculated for a September-February period. Asecond sample of210females was chosen independently...
- Q Copier maintenance. The Tri-City Office Equipment Corporationsells an imported copier on a franchise basis and performspreventive maintenance and repair service on this copier. The databelow have been collected from 45...
- Q An article gave data on various characteristics of subdivisionsthat could be used in deciding whether to provide electrical powerusing overhead lines or underground lines. Here are the values ofthe variable...
- Q You are given a list of all employees. You group the names bydepartment (Logistics, Sales, IT, Human Resource). Suppose youselect all employees in Sales.What type of sampling method did you...
- Q thevariable is “number of motor vehicle fatalitiesâ€A. Continuous, ratio levelB. Discrete, nominal levelC. Discrete, ratio levelD. Continuous, intervalALSO PLEASE EXPLAIN ANSWERithink the answer is B?notsure of correct answer
- Q 1. A class has 15 girls and 10 boys. The teacher wants to forman unordered pair consistingof 1 girl and 1 boy. How many ways are there to form such...
- Q The mean of the uniform distribution between 0 and 1 is μ = 0.5.Estimate this value with a 95% confidence interval using samples of100, 200, 400, 800, 1600, 3200, and...
- Q In 2017, 965 students registered for a course. Explain how you willuse the random number table to select a simple random sample of 20students.Start from digit one of row 6.Fill...
- Q Another coefficient mentioned in this week's readings is thecoefficient of determination, r^2. What information do we obtainfrom this coefficient?
- Q Aside fromplotting a graph- Describe another way to find the concentration ofan unknown other than interpolating from a graph.
- Q Please write down your understanding of binary class linearSVMs. Please cover the following subtopics:1)The primal form and its dual form for both hard margin and softmargin case;2) Concept of support...
- Q Geoff is running a carnival game. He has 15 marbles in a bag:there are 4 green marbles, 7 red marbles and 4 yellow marbles. Toplay a round of the game,...
- Q A two-variable model involving one quantitative explanatoryvariable and one categorical (binary) explanatory variable (and nointeraction), results in two regression lines that are:A.     Always parallel.B.     Could be parallel but, dependingon the data, may...
- Q he following question involves a standard deck of 52 playingcards. In such a deck of cards there are four suits of 13 cardseach. The four suits are: hearts, diamonds, clubs,...
- Q write as much you can*Imagine that a group of obese children is recruited for a studyin which their weight is measured, then they participate for 3months in a program that...
- Q The SAT has gone through many revisions over the years. Peopleargue that female students generally do worse on math tests butbetter on writing tests. Consider the following portion of data...
- Q 1.In the country of United States of Heightlandia, the heightmeasurements of ten-year-old children are approximately normallydistributed with a mean of 55.7 inches, and standard deviation of1.7 inches.What is the probability...
- Q Costco sells paperback books in their retail stores and wantedto examine the relationship between price and demand. The price ofa particular novel was adjusted each week and the weekly sales...
- Q In a study of cell phone usage and brain hemispheric​ dominance,an Internet survey was​ e-mailed to 6980 subjects randomly selectedfrom an online group involved with ears. There were 1332 surveysreturned....
- Q Advair, a combine bronchodilator and inhaled steroid isrelatively slow working. Usually a patient has to wait at least anhour before the full effect of this medicine kicks in. We wereinterested...
- Q Keno: Keno game is a game with 80 numbers 1,2, … , 80 where 20 numbered balls out of these 80 numbers will bepicked randomly. You can pick 4, 5,...
- Q Coronary heart disease (CHD) begins in young adulthood and isthe fifth leading cause of death among adults aged 20 to 24 years.However, studies of serum cholesterol levels among college studentsare...
- Q write a case study about problem solving using 7 qualitytools.
- 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 Suppose it is known that in a certain population the meansystolic blood pressure (SBP) is 120 mmHg and the standarddeviation is 10 mmHg. In a random sample of size 40...
- Q 100 losses are independent, identically distributed, with acommon uniform distribution over (0, 6). Using the normalapproximation, calculate the probability that the sum of all thelosses (the aggregate loss) will exceed...
- Q A treadmill manufacturer has developed a new machine with softertread and better fans than its current model. The manufacturerbelieves these new features will enable runners to run for longertimes than...
- Q FriendlyCooperativeImpatientTotalMale67416640800Female886161381085Total1560327781965The table shows a cross tabulation of two variables, gender andthe attitudes of the survey respondents towards the interviewerswho collected data from them.Can you conclude with at least 95% confidence...
- Q ID of Respondent# of Friends who BullyRespondent was a Bully Victim(0 = No; 1 = Yes)Gender(0 = Female; 1 = Male)# of Times Respondent Bullied Others121152410233018420045611663002771178400092111107118If you were to draw...
- Q AgeMileage6538087828381111590365490387756410959114406861212667515167636141287981096589535049A used car dealer wants to develop a regression equation thatdetermines mileage as a function of the age of a car in years. Hecollects the data shown below for the...
- Q Two plots at Rothamsted Experimental Station were studied forproduction of wheat straw. For a random sample of years, the annualwheat straw production (in pounds) from one plot was asfollows.5.705.915.706.687.317.187.065.796.245.916.14Use a...
- Q A high school is examining whether or not a certain collegeadmissions test prep course is helpful. To evaluate this, 15students took the college admissions test. Afterwards, they wentthrough the prep...
- Q Demonstrating that a correlation exists does not prove thatchanges in one variable are the cause of changes in the other,partly because other factors which are undetected may beinfluencing both known...
- Q Tomato weights and Fertilizer (Raw Data, SoftwareRequired):Carl the farmer has three fields of tomatoes, on one he used nofertilizer, in another he used organic fertilizer, and the third heused a...
- Q I have a ratio that in total doesn't equal to 100%, how wouldyou explain the reason for that? The data is of 13 people. I havedata Male 8 people= 61.54%,...
- Q 1) You want to construct a 92% confidence interval. The correctz* to use isA) 1.645B) 1.41C) 1.752) Suppose the average Math SAT score for all students takingthe exam this year...
- Q The following data represent the calories and​ sugar, in​ grams,of various breakfast cereals.ProductCaloriesSugarA27010.0B2803.8C29021.2D41023.4E52019.8F53023.9G55017.7Use the data above to complete parts​ (a) through​ (d).Compute the covariance.b. Compute the coefficient of correlation.c. Which...
- Q Calcium is essential to tree growth because it promotes theformation of wood and maintains cell walls. In 1990, theconcentration of calcium in precipatation in a certain area was0.12 milligrams per...
- Q Find the minimum sample size n needed to estimate μ for thegiven values of​ c, σ​, and E.c=0.95, σ=7.2, and E=1Assume that a preliminary sample has at least 30 members.n=___...
- Q Because some peopleare unable to stand to have their height measured, doctors use theheight from the floor to the knee to approximate their patients’height (in cm).Height of KneeOverall Height57.7192.347.5153.343.5146.244.8160.455.6171.454.9176.7a. Use...
- Q A computer training group would like to compare theeffectiveness of two modes of training. The first mode of trainingis a short 20 minute interactive one-on-one tutorial with theparticipant and the...
- Q Companies often develop and test hypotheses about theirproducts. For example, car manufacturers will test their cars todetermine fuel efficiency and miles per gallon. To ensure thatproducts are safe and that...
- Q A local anime fan club surveyed its members regarding theirviewing habits last weekend, and the following information wasobtained: 37 members had watched an episode of Naruto, 47 hadwatched an episode...
- Q A Chi-square test for goodness of fit is used to evaluatepreferences for 8 different designs of a new automobile. With asample of n = 500 the researcher obtained a Chi-squarestatistic...
- Q Explain the difference between convenience, non-probability,probability, stratified, clustered, and systematic samples.Write a multi-paragraph response.I just need each topic explained simply so I can understand andwrite the paragraphs
- Q Question 1: Refer to accompanying data set and use the25 home voltage measurements to construct a frequency distributionwith five classes. Begin with a lower class limit of 121.7 volts,and use...
- Q Not sure about question f-j . looking to confirm my answers withsomeoneHealth spending per person from a random sample of 20 countriesis shown below.CountryPer capita health expenditure in 2010Bahrain868Belarus324Belize243Brunei Darussalam886Colombia476Congo,...
- Q Suppose retailers would like to forecast the percentageof customers who plan to purchase gift cards during the upcomingholiday season. The following data show this percentage from 2002to 2009. The data...
- Q Agolf association requires that golf balls have a diameter that is1.68 inches. To determine if golf balls conform to the standard, arandom sample of golf balls was selected. Their diameters...
- Q How much money do people spend on graduation gifts? In 2007, afederation surveyed 2415 consumers who reported that they boughtone or more graduation gifts that year. The sample was selected...
- Q Assume that a researcher is interested in the relationshipbetween hours of sleep and anxiety. Eight individuals are randomlyselected and the amount of hours slept and anxiety scores aremeasured. The scores...
- Q In a survey conducted to determine, among other things, the costof vacations, 64 individuals were randomly sampled. Each person wasasked to compute the cost of her or his most recent...
- Q Lisa is at a bus stop. The times between successive bus arrivalsare independent and identically distributed exponential randomvariables with mean 3 minutes. While lisa is waiting, Mindy callsto say she...
- Q You intend to estimate a population mean with a confidenceinterval. You believe the population to have a normal distribution.Your sample size is 9.Find the critical value that corresponds to a...
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