Basic Math question and answers for October 11, 2023
- Q give example for a static mathematical model?
- Q Minium 150-200 words: Why is a confidence intervalbetter than a point estimate? Provide an example
- Q What are ALL the possible difficulties with with fitting linearregression? Please explain the reasoning.
- Q the shape of the distribution of the time required to get an oilchange at a 20?-minute ?oil-change facility is unknown.? However,records indicate that the mean time is 21.2 minutes?, and...
- Q A team of health research wants to investigate whether havingregular lunch break improves working adults’ sleep. A group of 85adults with a full-time job were recruited in the study, theyreported...
- Q Eyeglassomatic manufactures eyeglasses for different retailers.They test to see how many defective lenses they made the timeperiod of January 1 to March 31. Table #11.2.4 gives the defect andthe number...
- Q Use the data in the file andy.dta consisting of data onhamburger franchises in 75 cities from Big Andy's Burger Barn.Set up the modelln(Si)=b1 + b2ln(Ai) + ei,whereSi = Monthly sales...
- Q The types of raw materials used to construct stone tools foundat an archaeological site are shown below. A random sample of 1486stone tools were obtained from a current excavation site.Raw...
- Q 1. A recent poll was conducted by the Gallup organizationbetween April 2nd and April 8th, 2018. A total of 785 Facebookusers living in the U.S. were selected using random digit...
- Q The ideal (daytime) noise-level for hospitals is 45decibels with a standard deviation of 9 db; which is to say,this may not be true. A simple random sample of 80hospitals at...
- Q (3) A random sample of 51 fatal crashes in 2009 in which thedriver had a positive blood alcohol concentration (BAC) from theNational Highway Traffic Safety Administration results in a meanBAC...
- Q he number of chocolate chips in an? 18-ounce bag of chocolatechip cookies is approximately normally distributed with a mean of1252 chips and standard deviation 129 chips.?(a) What is the probability...
- Q Commercial real estate prices and rental rates sufferedsubstantial declines in 2008 and 2009.† These declines wereparticularly severe in Asia; annual lease rates in Tokyo, HongKong, and Singapore declined by 40%...
- Q Chi Square TestWe will now use Excel to run an example of a chi square test.Chi square test is checking the independence of two variables. Ourexample will test if taking...
- Q Match each example to the type of bias that would result. A researcher wants to know what proportion of AZ residentssupport light rail expansion. S/he arranges a two-monthstudy period during which...
- Q HeightWeightAgeShoe SizeWaist SizePocket Change64180397361866140319301256913031925151631253672511681552483115162129426322146317330834138601022662567661803383028566130319305063125328263268145331028118752354412406068138438275065165559302264140247319578240409381097116328732146819524103656612233926170531152572536712103010365078108237227569126238241757721524123641681252383036621055062423569126429271305514042829146714530830501. weight vs. age ? ?=.01/2Step1: Ho: __ _ ___ Ha: __ _ ___Step 2: Alpha level = _____Step 3: Samplingdistribution is df = _____Step 4: DecisionRule: I will reject...
- Q Cereal NameMfrCalProtFatSodFiberCarbSugarPotVitShelfRating100% BranN7041130105628025368.4100% Natural BranQ12035152881350333.98All-BranK704126097532025359.43All-Bran with Extra FiberK5040140148033025393.7Almond DelightR110222001148*25334.38Apple Cinnamon CheeriosG110221801.510.5107025129.51Apple JacksK11020125111143025233.17Basic 4G13032210218810025337.04Bran ChexR9021200415612525149.12Bran FlakesP9030210513519025353.31Cap'n'CrunchQ12012220012123525218.04CheeriosG11062290217110525150.77Cinnamon Toast CrunchG1201321001394525219.82ClustersG11032140213710525340.4Cocoa PuffsG11011180012135525222.74Corn ChexR1102028002232525141.45Corn FlakesK1002029012123525145.86Corn PopsK1101090113122025235.78Count ChoculaG11011180012136525222.4Cracklin' Oat BranK11033140410716025340.45Cream of Wheat (Quick)N10030801210*0264.53CrispixK1102022012133025346.9Crispy Wheat & RaisinsG100211402111012025336.18Double...
- Q The following random sample of weekly student expenses indollars is obtained from a normally distributed population ofundergraduate students with unknown parameters.8567675628172699184497569597053657871877174696564You have been charged to conduct a statistical test in...
- Q You read in the results section of an article in a psychologyjournal that the results of at-test for independent sample meansrevealed a significant t12 = 1.8, with ?ˆX1?X2 = 2....
- Q Solve for x -2 < (1/6)(10-x) < 2
- Q A university would like to examine the linear relationshipbetween a faculty? member's performance rating? (measured on ascale of? 1-20) and his or her annual salary increase. The table tothe right...
- Q Ch. 11, 2. Given two dependent random samples with the followingresults:Population 17168508476768079Population 27663548079827582Can it be concluded, from this data, that there is a significantdifference between the two population means?Let d=...
- Q *****Show step-by-step inExcel******An automobile rental company wants to predict the yearlymaintenance expense (Y) for an automobile using the number of milesdriven during the year ( X1 ) and the age...
- Q A manufacturer of nickel-hydrogen batteries randomly selects 100nickel plates for test cells, cycles them a specified number oftimes, and determines that 14 of the plates have blistered.z = 1.33p- value...
- Q In this exercise you are choosing between the followinginvestment strategies:Invest $200 in stock A. Stock A costs $20 per share. Expectedyield per share of stock A is $2, and the...
- Q A family is relocating from St. Louis, Missouri, to California.Due to an increasing inventory of houses in St. Louis, it is takinglonger than before to sell a house. The wife...
- Q Inyour own words, describe what you have learned about hypothesistesting and hypothesis testing for the mean. Give one or moreexamples of how you could use this information to test a...
- Q The density of an oil mixture (?mix) as a function of thetemperature (T) and the mass fraction of the three components (mi)was measured and results are shown :T (K) m1...
- Q A nutrition lab tested 40 randomly selected hot dogs to see iftheir mean sodium content was less than 325mg upper limit set byregulations for "reduced sodium" franks. The sample yielded...
- Q A nutritionist is interested in the relationship betweencholesterol and diet. The nutritionist developed a non-vegetarianand vegetarian diet to reduce cholesterol levels. The nutritionistthen obtained a sample of clients for which...
- Q Prove "The Birthday Problem" in this regard,Suppose there are some number of people in a room and we needneed to consider all possible pairwise combinations of those peopleto compare their...
- Q When using the test for homogeneity of variance, basically fouroutcomes or options can be considered if a violation of thehomogeneity of variance assumption is violated. These include:Option 1: Since a...
- Q In this problem, we use your critical values table to explorethe significance of r based on different sample sizes. (a) Is asample correlation coefficient ? = 0.82 significant at the...
- Q For a poisson distribution where X ~ Pois(u), solve thequestions below. Please show all work and all steps.a.) Show that the pmf is a pmf using the criteria for verifyingpmf...
- Q A numerical taxonomist studying the branched lamentous alga,Cladophora glom-erata, believes she has discovered a new species. C. glomerata hasa median branchingangle of 47. While the new species is quite similar...
- Q What is the minimum sample size required for estimating ? forN(?, ?2=121) to within ± 2 with confidence levels 95%,90%, and 80%?a. Find the minimum sample size for the 95%confidence...
- Q Theon-base percentage (OBP) indicates how successful a baseball playeris as a batter. The dataset OBP in UsringR contains the OBP for theyear 2000. Test whether these data come from normal...
- Q Question 1Seven baseballs are randomly selected from the production line tosee if their stitching is straight. Over time, the company hasfound that 89.4% of all their baseballs have straight stitching....
- Q Heights for group of people are normally distributed with mean =63 inches and standard deviation = 4.0 inches. Find the proportion,P, of people in the group whose heights fall into...
- Q Please be very clear in part b) show all steps please. I havetrouble understanding that part. Thank you.Whencoin1isflipped,itlandsonheadswithprob- ability .4; when coin2 is flipped, it lands on heads with probability...
- Q Saeko owns a yarn shop and want to expands her color selection.Before she expands her colors, she wants to find out if hercustomers prefer one brand over another brand. Specifically,...
- Q in Pennsylvania Cash 5 lottery balls are numbered 1 to43 right balls are selected does not replacement the order in whichthe balls are selected does not matter the term your...
- Q 95% conf, n=41 , X bar=$67,600, s=18,484 use chi-square criticalvalues Finding confidence interval for population standarddeviation. Assume simple random sample has a normaldistribution.
- Q a dentist wants to find out the average time taken by herhygienist for x rays and clean teeth for patients. she recorded thetime to serve 24 randomly selected patients ....
- Q The data below shows the sugar content in grams of severalbrands of? children's and? adults' cereals. Create and interpret a?95% confidence interval for the difference in the mean sugar?content, ?C??A....
- Q The Daily Show. A 2010 Pew Research foundationpoll indicates that among 1,099 college graduates, 33% watch TheDaily Show. Meanwhile, of the 1,110 people in the poll with a highschool degree...
- Q Sociologists say that 90% of married women claim that theirhusband's mother is the biggest bone of contention in theirmarriages (sex and money are lower-rated areas of contention).Suppose that ten married...
- Q According to the sixth annual survey of employees of advertisingagencies, carried out by the company Altschuler, Melvoin &Glasser, these employees can wait another excellent year for theircompensation (Adveertising Age, December...
- Q In what ways do advertisers in magazines use sexual imagery toappeal to youth? One study classified each of 1509 full-page orlarger ads as "not sexual" or "sexual," according to the...
- Q A certain academic program claims that their students graduatein less than 4 years on average. A random sample of 50 students istaken and the mean and standard deviation are found....
- Q When traveling 40 mph (miles per hour), the distance that ittakes Fred’s car to stop varies evenly between 120 and 155 feet.(This includes the reaction distance and the braking distance.)...
- Q USE SSPS FOR THIS APPLICATION EXERCISE!!!A nurse at a health clinic hypothesizes that ear thermometersmeasure lower body temperature than oral thermometers. The nurseselects a sample of healthy staff members and...
- Q Let the independent random variables X1, X2, and X3 havebinomial distributions with parameters n1=3, n2=5, n3=2 and thesame probabilitiy of success p = 2/5.Find P(X1=1-X3).Find P(X1=X3).Find P(X1+X2+X3>=1).Find the expected value...
- Q Explain the difference between a set that is well defined andone that is not. Give an example of a well-defined set. Name anddescribe your well-defined set using roster form and...
- Q According to the Normal model ?N(0.052?,0.027) describing mutualfund returns in the 1st quarter of? 2013, determine what percentageof this group of funds you would expect to have the followingreturns. Complete...
- Q 4. Consider the relationship between the number of bids an itemon eBay received and the item's selling price. The following is asample of 5 items sold through an auction.Price in...
- Q How can size of a sample hide a confounder? Is this aparadox?
- Q Scores in the first and final rounds for a sample of 20 golferswho competed in tournaments are contained in the Excel Online filebelow. Construct a spreadsheet to answer the followingquestions.ABCD1PlayerFirst...
- Q 2. 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 Among a simple random sample of 322 American adults who do nothave a four-year college degree and are not currently enrolled inschool, 145 said they decided not to go to...
- Q Consider the following gasoline sales time series. If needed,round your answers to two-decimal digits.WeekSales (1,000s of gallons)118222315424518615721819921102011161222(a)Show the exponential smoothing forecasts using ? = 0.1, and ? =0.2.ExponentialSmoothingWeek? = 0.1?...
- Q 1. Consider the relationship between the number of bids an itemon eBay received and the item's selling price. The following is asample of 55 items sold through an auction.Price in...
- Q A company maintains three offices in a certain region, eachstaffed by two employees. Information concerning yearly salaries(1000s of dollars) is as follows:Office112233Employee123456Salary 24.7 28.6 25.2 28.6 20.8 24.7 (a) Suppose two of these employees are randomly selected...
- Q Consider the table of test scores below:36166197273764599181863956852636511868697861492982Find the Mean.Find the Median.Find the Mode.Discuss which of these statistics you would use to describethis set of test scores and back up your...
- Q Fill in the blank. In a drive thru performance study, theaverage service time for McDonald's is 203.21 seconds with astandard deviation of 5.67 seconds. A random sample of 90 times...
- Q Men at a construction site were moving concrete blocks from atruck, a short distance to the base of a house. The first day theaverage man moved 62 blocks per hour.The...
- Q Police response time to an emergency call is the differencebetween the time the call is first received by the dispatcher andthe time a patrol car radios that it has arrived...
- Q 0-49922500-9992011000-14991,6451500-19999,3652000-249992,1912500-2999569,3193000-34991,387,3353500-3999988,0114000-4499255,7004500-499936,7665000-54993,9940-49922500-9992011000-14991,6451500-19999,3652000-249992,1912500-2999569,3193000-34991,387,3353500-3999988,0114000-4499255,7004500-499936,7665000-54993,994D) Use the normal model to determine the proportion of babies ineach classHow do I manually determine the normal mode? Please provide stepby step manually (excel is what I am...
- Q 1a) Explain why we reject the null hypothesis when the p-valueis less than the level of significance?b) Explain to someone unfamiliar with statistics how to tellwhether a statistical test is...
- Q Tom Marley and Jennifer Griggs have recently started a marketingresearch firm in Jacksonville, Florida. They have contacted theFlorida Democratic Party with a proposal to do all politicalpolling for the party....
- Q Please state which of the following apply to questions6. Pr(r = 6 | n = 22, p = 48%)BinomialPoissonHypergeometricNone of the above7. Pr(r = 6 | n = 13, p...
- Q Given are five observations for two variables, and . xi2 15 7 2219 yi50 48 58 11 23 d. Develop the estimated regression equation bycomputing the values of and using...
- Q Given a normal distribution with the ?=52 and ?=3?, completeparts? (a) through? (d).a. What is the probability that X>47??P(X>47?)=0.9525?(Round to four decimal places as? needed.)b.What is the probability that X<49???P(X<49?)=0.1587?(Round...
- Q In a simple random sample of 1000 people age 20 and over in acertain? country, the proportion with a certain disease was foundto be 0.160 ?(or 16.0?%). Complete parts? (a)...
- Q A researcher is interested in investigating whether religiousaffiliation and the brand of sneakers that people wear areassociated. The table below shows the results of a survey.Frequencies of Religions andSneakersNikeAdidasOtherProtestant97100101Catholic5461100Jewish152524Other856173What can...
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