Statistics question and answers for July 13, 2023
- Q Find the 94th percentile, P94,  from thefollowing data11.712.314.114.71617.217.42223.124.825.92626.527.127.52828.228.43031.433.133.635.535.737.237.337.84242.342.744.145.345.447.948.349.9Please show work, I have tried to multiply total number of datapoints (36) by .94 percent to get the answer of 33.84, which Ibelieve...
- Q A local SME bank provides 4 types of loans of its customers andthese loans yield the following interest rates to the Bank:Personal Loan 1: Â Â Â Â Â Â Â 14%Personal Loan 2: Â Â Â Â Â Â Â 20%HomeLoan:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 20%Overdraft:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10%The Bank has...
- Q 10.2.9An article in Radio Engineering and Electronic Physics(1980, Vol. 25, pp. 74-79) investigated the behavior of astochastic generator in the presence of external noise. The numberof periods was measured in...
- Q n chips manufactured, two of which are defective. k chipsrandomly selected from n for testing.Q1. What is Pr(a defective chip is in k selected chips) ?n persons at a party...
- Q The business faculty of a public university recorded data on thenumber of students enrolled in the different study majors for theyears 2018 and 2019. These data are useful for the...
- Q 13. The following table identifies a group of childrenby one of four hair colors, and by type of hair.Hair TypeBrownBlondBlackRedTotalsWavy2116548Straight781314Totals19218part (b)What is the probability that a randomly selected childwill have...
- Q Suppose that the IQ of adults is normally distributed with amean of 100 and standard deviation of 15. not sure with currentsolution posted, personally it wasn't clear step by step...
- Q If you make random guesses for 10 multiple choice testquestions each with 5possible answers), what is the probability of getting allanswers correct?
- Q For the data set below, find the upper outlier boundary.154 160 146 131 148 164 199 169 139 16519919165193.5
- Q A researcher would like to determine if relaxation training willaffect the number of headaches for chronic headache sufferers. Fora week prior to training, each participant records the number ofheadaches suffered....
- Q Consider the relationship between hourly wage rate and educationattainment. A random sample of 21 male workers was collected toestimate the following modelYi =β0+β1Xi+ui,fori=1,...,21.Here,Yiisthelogarithmofhourlywagerate,log(wage),forthei-thworker.Xiistheeducation level, husedu, of the i-th worker, which...
- Q 4. Assume that the repetition is not allowed. How many ordersthat can be build from 6 numbers, 2, 3, 4, 5, 7 and 9, taken 3 at atime, to produce...
- Q “I don’t like statistical tests,†Ben says grumpily. “There’s somuch chance for error, especially Type I error. I don’t understandwhy we don’t just set alpha really low, like 0.01 or...
- Q 7. Consider the following scenario:• Let P(C) = 0.2• Let P(D) = 0.3• Let P(C | D) = 0.4Part (a)Find P(C AND D).Part (b)Are C and D mutually exclusive? Why...
- Q 1.Assume that x has a normal distribution with the specified mean andstandard deviation. Find the indicated probability.mean=100, stadard dev. = 18P(x> or = 120) = ?2. Thickness measurements of anciwnt...
- Q Dual-energy X-ray absorptiometry (DXA) is a technique formeasuring bone health. One of the most common measures is totalbody bone mineral content (TBBMC). A highly skilled operator isrequired to take the...
- Q Derive a general expression for the average failure rate of aWeibull distribution between two point in time, t1 and t2.
- Q Calculate the​ 95% prediction intervals for the four differentinvestments included in the following table. Small Stocks ​S&P500 Corporate Bonds ​T-Bills Average Return 18.37​% 11.84​% 6.47​%3.46​% Standard Deviation of returns 38.79​%...
- Q Consider the following Markov chain:012300.30.500.210.50.20.20.120.20.30.40.130.10.20.40.3What is the probability that the first passage timefrom 2 to 1 is 3?What is the expected first passage time from 2 to1?What is the expected...
- Q A researcher believes that there is a positive relationshipbetween the time spent in studying and the score a student gets atthe end of the semester. She selected a sample of...
- Q Three machines M1, M2 and M3 produce nominally identical items.The evidence of the engineers past experience is that 5 % of theoutput from machine M1 is faulty, 3.5 % of...
- Q The following table shows the beta carotene and chlorophyllcontents of curry (spice)leaves under different postharvest treatments.Postharvest storage temperature& treatmentβ-carotene(µg/g)Chlorophyll(mg/g)Fresh500 ± 1.522.8 ± 1.2Oven-dried (60 oC)148 ± 1.29.9 ± 1.2Air-dried (25...
- Q Authors in the New England Journal of Medicine investigated apossible link between Zika virus and microcephaly (or other fetusdevelopmental abnormalities) and researchers collected thefollowing data from Rio de Janeiro state...
- Q The following table shows the beta carotene and chlorophyllcontents of curry (spice) leaves under different postharvesttreatments.Postharvest storage temperature& treatmentβ-carotene(µg/g)Chlorophyll(mg/g)Fresh500 ± 1.522.8 ± 1.2Oven-dried (60 oC)148 ± 1.29.9 ± 1.2Air-dried (25...
- Q Question 1A camera is located 3km away from the entrance gate of a port tocount the number of incoming trucks. Trucks that have passed thecamera but have not passed the...
- Q Discrete Math: 7) How many 4-element DNA sequences..a) Do not contain the base T?b) Contain the sequence ACG?c) Contain all four bases A, T, C, and G?d) Contain exactly three...
- Q A producer of soap dispensers claims its machine dispense liquidwith a standard deviation of 3.1 ounces. A random sample of 20machines found the standard deviation to be 4.6 ounces. Is...
- Q The results indicated no difference between the means when thestatstics-only condition was compared to the combinedstatistics+victim condition. Compute the tLSD valuehere.donations differed significantly by request type, F(2,55) = 3.35, p...
- Q Please show all workA bottling company uses a filling machine to fill plasticbottles with a popular cola. The bottles are supposed to contain300 milliliters (ml). In fact, the contents vary...
- Q what are the strength and weaknesses of formal theoryand statistical analysis? how can these methods be combined withqualitative methods?(word limit:700 words)
- Q Five hundred consumers were surveyed about a new brand of snackfood, Crunchicles. Their age groups and preferences aregiven in the table.18–2425–3435–5555 and overTotalLiked Crunchicles420233582Disliked Crunchicles47564438185No Preference27828170233Total788495243500One consumer from the survey...
- Q A researcher conducts a study on the effects of amount of sleepon creativity. Twenty subjects come to the researcher’s clinic. Theresearcher divides the subjects into four groups, each containingfive subjects....
- Q INCLUDE:all Hypothesis Tests must include all four steps,clearly labeledall Confidence Intervals must include all output aswell as the CI itselfinclude which calculator function you used for eachproblemAt a community college,...
- Q Include:all hypothesis tests with all fourstepsall Confidence Intervals with all output as well asthe CI itself'all calculator functions usedAn experiment was done to see whether open-book tests make adifference. A...
- Q Some sources report that the weights of full-term newborn babieshave a mean of 7 pounds and a standard deviation of 0.6 pound andare Normally distributed. What is the probability that...
- Q 1. The time it takes to do the in class problem sets averages40 minutes. To test the hypothesis that the problem sets forhypothesis testing will be completed faster a sample...
- Q 1. Construct an 80​% confidence interval to estimate thepopulation mean when x overbarx=128 and s​ =27 for the sample sizesbelow.​a)n=20       ​b)n=50       ​c)n=90​a) The 80​% confidence interval for the population mean whenn=20 is...
- Q 2. The average score on an exam is 78. A test is given to 40students and the average on the exam was 82 with a standarddeviation of 14.a) At the...
- Q (14) 1. The average time to run a race is 14 minutes. You wishto see if a new training regimen will lower the time to run therace. After doing the...
- Q Consider the following equation:^CHICKEN = -85.4 - 0.58 PRICE + 88.76 ln (YD)CHICKEN - per capita consumption of chicken in poundsPRICE - price of chicken in dollars per poundYD -...
- Q A component of cholesterol called high-density lipoprotein isknown to lower the risk of coronary heart disease. It is believedthat runners have increased HDL levels. The following data givedetails of an...
- Q In a study to evaluate drug efficacy, the manufacturer of a newtype of generic drug for treating adisease wants to investigate the effectiveness of this generic drugas compared to the...
- Q At a local coffee house, 80% of coffee buyers will chooseregular coffee, and20% will choose decaf.A. Out of the next 5 customers, what is the probability that 3 willchoose decaf...
- Q Identify the correct statements. Fix the incorrect ones.A sampling distribution describes the distribution of datavalues.A sampling distribution shows the behavior of a sampling processover many samples.The probability distribution of a...
- Q Let n1=40 , p1=0.60 and n2=50and p2=0.40.Given: H0:π1≤π2{\"version\":\"1.1\",\"math\":\"H_0: \pi_1 \leq\pi_2\"}Calculate the test statistic and p-value.(a)-0.0261 and 0.4896 (b)1.8861 and 0.0296 (c) -0.9428 and0.1729 (d) -0.4714 and 0.3939
- Q 1. Let Z be a standard normal random variable. Find…a. Pr (Z ≥ -0.78) b. Pr(-0.82  Z  1.31)2. A random variable X is normally distributed with mean ?...
- Q A manager wishes to see if the time (in minutes) it takes fortheir workers to complete a certain task is different if they arewearing earbuds.  A random sample of 20...
- Q In a game of cards you win $1 if you draw an even number, $2 ifyou draw diamonds, $5 if you draw a king and $10 if you draw thequeen...
- Q More than 100 million people around the world are not gettingenough sleep; the average adult needs between 7.5 and 8 hours ofsleep per night. College students are particularly at risk...
- Q The frequency distribution shown in the following table liststhe number of hours per day a randomly selected sample of teenagersspent watching television. Where possible, determine what percentof the teenagers spent...
- Q Problem #8Among 300 employees in a company 100 had Engineering degree, 110had MBA degree, and 70 had both Engineering and MBA degrees. If anemployee from this company is selected at...
- Q 5. A study was performed to compare the e↵ect of dietarysupplementation with a low-ï¬bre reï¬ned wheat product on the serumcholesterol of 20 healthy participants aged 23-49 years. Eachsubject had a...
- Q Power +, Inc. produces AA batteries used in remote-controlledtoy cars. The mean life of these batteries follows a normaldistribution with a mean of 36 hours and a standard deviation of5.3...
- Q The reference desk of a university library receives requests forassistance. Assume that a Poisson probability distribution with anarrival rate of 11 requests per hour can be used to describe thearrival...
- Q (a)A study of 4-year college graduates showed that the averagegraduate had 132 credit hours. The following 6 samples of credithours were recorded from Maryland college's students concerningtheir credit hours upon...
- Q Q11. Use the given information to find the number of degrees of​freedom, the critical valueschi Subscript Upper L Superscript 2χ2Landchi Subscript Upper R Superscript 2χ2R​,and the confidence interval estimate ofsigmaσ.It...
- Q The average age of students at INTI International University isknown to be 22.5 years old. Assume the population is normallydistributed with a standard deviation of 5 years. Find theprobability that...
- Q Three products compete in the same market. In 2019, marketshares were distributed as follows: Product A: 50% Product B: 15%Product C: 35%1000 people were asked which of the three products...
- Q The national health organization warns that 30% of the middleschool students nationwide have been drunk. A local health agencyrandomly and anonymously surveys 100 of the middle school studentsin its city...
- Q A researcher at a college hears students complain that theydon’t have enough time to in their week to study. He believes thatthe students at the college are spending much more...
- Q 5) (1 point) Triathlon times. In triathlons, itis common for racers to be placed into age and gender groups.Friends Leo and Mary both completed the Hermosa Beach Triathlon,where Leo competed...
- Q Q7. Here are summary statistics for randomly selected weights ofnewborn​ girls: n=210​, x overbarx=28.9 ​hg, s=6.3hg. Construct aconfidence interval estimate of the mean. Use a 99​% confidencelevel. Are these results...
- Q Below are 50 random numbers taken from a random numbergenerator.0.5340.4010.4010.4450.4450.1250.0940.0940.1040.1040.3450.2590.2590.2880.2880.7850.5890.5890.6540.6540.9750.7310.7310.8130.8130.8340.6260.6260.6950.6950.6830.5120.5120.5690.5690.3220.2420.2420.2680.2680.5260.3950.3950.4380.4380.2340.1760.1770.1980.196a) Using 5 class intervals, determine the computed chi-squarevalue. Answer in 1 decimal place. Â Â b) What is the critical value of...
- Q A factory finds that, on average, 10% of the bulbs produced by agiven machine will be defective for certain specified requirements.If 8 bulbs are selected at random from the day's...
- Q Bardi Trucking Co., located in Cleveland, Ohio, makes deliveriesin the Great Lakes region, the Southeast, and the Northeast. JimBardi, the president, is studying the relationship between thedistance a shipment must...
- Q A consumer buying cooperative tested the effective heating areaof 20 different electric space heaters with different wattages.Here are the results.HeaterWattageArea11,50018321,0003031,50034541,50023551,50046562,00056571,50045581,25045591,000255101,750545111,7504801245020132,200725143501515200151630015171,750475181,30044519800202030035Click here for the Excel Data FileCompute the correlation between the...
- Q The Transportation Security Administration (TSA) collects dataon wait time at each of its airport security checkpoints. Forflights departing from Terminal 3 at John F. Kennedy InternationalAirport (JFK) between 3:00 and...
- Q A Gallup poll asked a sample of Canadian adults if they thoughtthe law should allow doctors to end the life of a patient who is ingreat pain and near death...
- Q In a series of projects I determined linear correlationcoefficients between various explanatory and response variables.Rank projects thru 5 in order of the increasing strength ofcorrelation.Project numberr1-0.320.53-1.040.950What does r measure?Given the...
- Q A company claims that the mean thermal efficiency of dieselengines produced by them is 32.3%. To test this, claim a randomsample of 40 engines were examined which showed the mean...
- Q In test of a computer component, it is found that the meanbetween failures is 520 hours. A modification is made which issupposed to increase the time between failures. Tests on...
- Q Question 2The Body Mass Index (BMI) is a value calculated based on theweight and the height of an individual. In asmall European city, a survey was conducted one year ago...
- Q The average age of online consumersten years ago was 23.3 years. As older individuals gainconfidence with the Internet, it isbelieved that the average age has increased. We would like totestthis...
- Q The number of heads (H) reported by all of you is tabulatedbelow, w here the first column is the number of heads and thesecond column is the number of times...
- Q 14. A researcher reports outcomes of one-factor ANOVA as F(5,60) = 3.24, p > .05. Based on the df values, how many groupswere compared in the study, and what was...
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