Basic Math question and answers for September 09, 2023
- Q The dataset TrafficFlow gives the delay time in seconds for 24simulation runs in Dresden, Germany, comparing the current timedtraffic light system on each run to a proposed flexible trafficlight system...
- Q 8) What proportion of a normal distribution is located betweeneach of the following z-score boundaries?a. z = –0.25 and z = +0.25b. z = –0.67 and z = +0.67c. z...
- Q We are interested in whether math score (math – a continuousvariable) is a significant predictor of science score (science – acontinuous variable) using the High School and Beyond (hsb2)data.State the...
- Q Assume that a sample is used to estimate a population proportionp. Find the 95% confidence interval for a sample of size380 with 125 successes. Enter your answer as a tri-linearinequality...
- Q Find the median, the lower half and the upper half of thehistory 108 test scores10,16,14,22,21,13,15,14,10,18,19,8,16,12,18,11,9,10,15,10,21,14,18,19,1819,3,25,18,13,1,16,9,14,821,13,14,18,16,5,11,17,14,12,16,18,16,18,17,10,12,19,9,3,15,17
- Q The director of research and development is testing a newmedicine. She wants to know if there is evidence at the 0.1 levelthat the medicine relieves pain in more than 363...
- Q Determine the Appropriate Analysis For each of the followingscenarios, identify the appropriate analysis.2. A guidance counselor at a high school wants to be bestinformed about the universities and colleges that...
- Q List and explain the t-test assumptions.
- Q a. What is hypothesis testing in statistics? Discussb. Does Type I error being considered more serious than Type IIerror? Explainc. What is the p-value of a test? Give an example
- Q Let X represent a binomial random variable with n = 380 and p =0.78. Find the following probabilities. (Round your final answersto 4 decimal places.) Probability a. P(X ? 300)...
- Q A machine at Katz Steel Corporation makes 4-inch-long nails. Theprobability distribution of the lengths of these nails isapproximately normal with a mean of 4 inches and a standarddeviation of 0.10...
- Q The mean per capita consumption of milk per year is 133 literswith a variance of 576.If a sample of 195 people is randomly selected, what is theprobability that the sample...
- Q Complete the following problems usingR. Name the file with your last name, e.g.,“Prob set 6-Smith.eoc”Clearly label problems, and be sure to turnin explanations and interpretations whereappropriate.3.Total cholesterol has been reported to...
- Q 3. A machine is used to fill containers withorange juice. Fill volume can be assumed to be normallydistributed. A random sample of ten containers is selected, and thenet contents (oz)...
- Q A manufacturer of electronic components is interested indetermining the lifetime of a certain type of battery. A sample, inhours of life, is as follows 123, 116, 122, 110, 175, 126,...
- Q The USA has been invaded by a ship of 6 aliens -- well, sort of,they actually just flew here from planet YB54D (known to themsimply as "Home") as a part...
- Q A Relaxin receptor agonist drug (RRA01) for the acute heartfailure treatment is developed by the Sunny Pharmaceutical Company.It is a publicly traded company. The reduction of cardiovasculardeath (mortality) was used...
- Q The Acme Company manufactures widgets. The distribution ofwidget weights is bell-shaped. The widget weights have a mean of 49ounces and a standard deviation of 7 ounces. Use the Empirical Ruleand...
- Q An online shoe retailer sells women’s shoes in sizes 5 to 10. Inthe past orders for the different shoe sizes have followed thedistribution given in the table provided. The management...
- Q A random sample of 400 electronic components manufactured by acertain process are tested, and 30 are found to be defective.a) Let p represent the proportion of componentsmanufactured by this process...
- Q A data set with whole numbers has a low value of 20 and a highvalue of 89. Find the class width for a frequency table with sevenclasses.If possible, Please show...
- Q As you just saw, we used a Tukey post hoc test to look at thedifferences between the sloppy, dressy, and casual conditions. Sowhy not just use three t-Tests (one comparing...
- Q please assist with data cleaning problemsjust want article on data cleaning problems
- Q In 1950?, an organization surveyed 1100 adults and? asked, "Areyou a total abstainer? from, or do you on occasion? consume,alcoholic? beverages?" Of the 1100 adults? surveyed, 363 indicatedthat they were...
- Q ou wish to determine if there is a negative linear correlationbetween the age of a driver and the number of driver deaths. Thefollowing table represents the age of a driver...
- Q he mean cost of domestic airfares in the United States rose toan all-time high of $375 per ticket. Airfares were based on thetotal ticket value, which consisted of the price...
- Q In your own words write a summary about anti smokingmessages in the United state
- Q The following table shows the unemployment rate for people withvarious education levels in the United States. Suppose we areinterested in predicting the unemployment rate based on theeducation level.Years of EducationUnemployment...
- Q Answer True or FalseA in a density histogram the area of a region is equivalent tothe density of that region_________.Extreme values or “outlier” have a great effect on theInterquartile range...
- Q 6. (a).In a particular town 10% of the families have no children, 30%have one child, 20% havetwo children, 40% have three children, and 0% have four. Let Trepresent the totalnumber...
- Q According to Harper's Index, 50% of all federal inmatesare serving time for drug dealing. A random sample of 15 federalinmates is selected.(a) What is the probability that 10 or more...
- Q 1. Major television networks have never seemed to have issuesshowing commercials for beer and other alcoholic beverages. Eventhough adult viewers tend to enjoy the commercials, most adultsseem to think that...
- Q Assume that 80% of people are left-handed. If we select 5 peopleat random, find the probability of each outcome described below,rounded to four decimal places:a. There are some lefties (?...
- Q For a study, 375 patients were randomly assigned tor eceive adaily dose of levvofloxacin, and 363 were given placebo. In thegroup receiving treatment, fever was present in 243 patients forthe...
- Q Group 1: 4.2, 4.2, 3.4Group 2: 4.5, 2.1, 2.3Group 3: 1.2, 0.3, -0.3, 2.3Use the Bonferronni method to test each of the 3 possiblehypotheses at the 3% significance level.(a) Find...
- Q 1. a. Assume that Data Set A depicts the scoresof 10 subjects who received either Treatment 1 orTreatment 2. Calculate a t-test for independent means todetermine whether the means are...
- Q The yield of a chemical process is being studied. The two mostimportant variables are thought to be the pressure and thetemperature. Three levels of each factor are selected, and afactorial...
- Q According to one survey taken a few years ago, 32% of Americanhouseholds have attempted to reduce their long-distance phone billsby switching long-distance companies. Suppose that businessresearchers want to test to...
- Q Question 15.What are the three required assumptions for the appropriate useof the independent groups t-test? What are the three requiredassumptions for the appropriate use of the dependent groupst-test?Can you use...
- Q Please answer (F)Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately ?2...
- Q Yellow stains on white clothing are stubborn discolorationsbelieved to result from oxidated body oils that have reactedchemically with clothing’s cellulose fibers (as if it were a dye).In as little as...
- Q Is 2k-1 odd?I get that 2(some int k) + 1 is the property for odd numbers.The main question:I am confused on how 2k-1= 2k-2+1 which is a form of k?
- Q Researchers for an advertising company are interested indetermining if people are more likely to spend more money on beerif advertisers put more beer ads on billboards in a neighborhood inPhiladelphia....
- Q Problem 8-12 (Algorithmic)Many forecasting models use parameters that are estimated usingnonlinear optimization. The basic exponential smoothing model forforecasting sales isFt + 1 = ?Yt + (1 –?)FtwhereFt + 1 = forecast of...
- Q The length of time for an individual to wait at a lunch counteris a random variable whose density function isf(x) = (1/4)e^(-x/4) for x > 0 and = 0 otherwisea)...
- Q A poll printed the results of a survey of 880Americans focusingon their perception of the quality of Japanese products. It hasbeen observed that the sentiment towards Japanese products hasactually improved...
- Q Meteorites randomly strike the earth’s surface at an averagerate of 90 meteorites per hour.(a) Find the probability that at least 4 meteorites strike theearth during a three-minute interval.(b) Find the...
- Q Ocean currents are important in studies of climate change, aswell as ecology studies of dispersal of plankton. Drift bottles areused to study ocean currents in the Pacific near Hawaii, theSolomon...
- Q It is well established that both nature (genetics) and nurture(environment) play a role in who we are and how we behave ashumans. One way to examine the effect of nature...
- Q Researchers conducting a clinicaltrial randomly assigned 60 patients with painful kneeosteoarthritis evenly into one of three treatment groups:glucosamine, chondroitin, or placebo.After the study period,patients were asked if they experienced substantial...
- Q A research service estimates that the mean annual consumption offresh market tomatoes by a person in the US is atleast 21 pounds.You doubt this claim. A simple random sample of...
- Q What is the relationship between the number of minutes per day awoman spends talking on the phone and the woman's weight? The timeon the phone and weight for 8 women...
- Q At Acme Bank the total amount of money that customers withdrawfrom an automatic teller machine (ATM) each day is believed to benormally distributed with a mean of $8600 and a...
- Q Here are summary statistics for randomly selected weights ofnewborn? girls: n =191?, x? = 33.2 ?hg, s = 6.1 hg. Construct aconfidence interval estimate of the mean. Use a 90?%confidence...
- Q A professor's commute is normally distributed with a mean of 40minutes and a standard deviation of 10 minutes. (a) What is theprobability that the professor gets to work in 30...
- Q Given the follow data for two pooled samples, calculate %95confidence interval for eachmean, 95% confidence interval for difference of means, andone-tailed p-value for the null hypothesis, “Ynot greater than X”.a....
- Q A chemical engineer is investigating the effect ofprocess operating temperature on product yield.The study results inthe following data:TemperatureYield10061.0711066.0112079.2813075.0414080.3015097.9516098.17170110.07180121.28190118.21You can use Minitab to answer the following questions.However, you should be able...
- Q 6. The table below gives the list price and the number of bidsreceived for five randomly selected items sold through onlineauctions. Using this data, consider the equation of the regressionline,...
- Q You may need to use the appropriate appendix table or technologyto answer this question.A simple random sample withn = 54provided a sample mean of 23.5 and a sample standard deviationof...
- Q 1. Listed below are attractiveness ratings made by participantsin a speed dating session. Each attribute rating is the sum of theratings of five attributes (sincerity, intelligence, fun, ambition,shared interests)Use a...
- Q There is a game called Bishops bank where on the table had numbers1 through 25 painted on it. Players place a dime on a number theychoose and a fair gaming...
- Q 3. Find the data female and male lifeexpectancy for the 13 richest and 14 poorest countries onearth.Country IDCountry NameFemale LEMale LE1Japan86.880.52Switzerland85.381.33Singapore86.1804Australia84.880.95Spain85.580.16Iceland84.181.27Italy84.880.58Israel84.380.69Sweden8480.710France85.479.411south Korea85.578.812Canada84.180.213Luxembourg8479.8170Malawi59.956.7171Mali58.358.2172Guinea6056.6173Mozambique59.455.7174South Sudan58.656.1175Cameroon58.655.9176Somalia56.653.5177Nigeria55.653.4178Lesotho55.451.7179Cote d'Ivoire54.452.3180Chad54.551.7181Central African Republic54.150.9182Angola5450.9183Sierra Leon50.849.3Test whether there is...
- Q 5. Listed in the table below are the robbery and aggravatedassault rates (occurrences per 100,000) for the 12 most populatedU.S. cities in 2006: City Robbery (x) Aggravated Assault (y) NewYork...
- Q suppose we take a die with 3 on three sides 2 on two sides and 1on one side, roll it n times and let Xi be the number of times...
- Q Distillation is a process for separating and collectingsubstances according to their reaction to heat. When heat isapplied to a mixture, the substance that evaporates and iscollected as it cools is...
- Q 6.20. A convenience store owner wants to know how long hiscustomers spend browsing the store before making a purchase. It isfound that time spent is normally distributed with an average...
- Q A husband and wife, Ed and Rina, share a digital music playerthat has a feature that randomly selects which song to play. Atotal of 3476 songs have been loaded into...
- Q A random sample of ? measurements was selected from a populationwith standard deviation ?=11.7 and unknown mean ?. Calculate a 90 %confidence interval for ? for each of the following...
- Q 1.Are men smarter than women at Private Universities in theUnited States? A study was conducted, randomly selecting 400 men,and 400 women from different Private Universities across the US,and asking for...
- Q USA Today reported that Parkfield, California, is dubbed theworld’s earthquake capital because it sits on top of the notoriousSan Andreas fault. Since 1857, Parkfield has had a major earthquakeon average...
- Q What is an approach to assigning probability? And what is adifficult one to understand?
- Q A biologist measures the lengths of a random sample 45 maturebrown trout in a large lake and finds that the sample a mean weightof 41 pounds. Assume the population standard...
- Q A new battery’s voltage may be acceptable (A) orunaccept- able (U). A certain flashlight requires twobatteries, so bat- teries will be independently selected and testeduntil two acceptable ones have been...
- Q Your company isconsidering two products for a new market. The probabilitydistribution for the demand for the two products is presented inthe table below. Q(A) and Q(B) are the possible quantities...
- Q A transect is an archaeological study area that is 1/5mile wide and 1 mile long. A site in a transect is thelocation of a significant archaeological find. Let xrepresent the...
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