Basic Math question and answers for August 30, 2023
- Q You are constructing a 90% confidence interval for onepopulation mean. A sample if size 20 is taken from the populationof interest. The mean from the sample is 5 and the...
- Q Suppose that diastolic blood pressure readins of adult male have abell-shaped distribution with a mean of 84 mmHg and a standarddeviation of 9 mmHg. Using the empirical rule, what percentage...
- Q data contained in the chart below (PGA Tour website, November 1,2012) was used to develop an estimated regression equation topredict the average number of yards per drive given the ball...
- Q *Include all calculations and no excel please*A buyer for National Sports must place orders with Saucony priorto the time the shows will be sold as they are manufacturedoverseas and shipping...
- Q You are interested in looking at the returns to experience (howmuch wages go up for each additional year a person works). Thereare several possible models you can run. Answer the...
- Q Which one of the following statements is correct abouthypothesis testing?
- Q 1) Researchers have found that providing therapy dogs on collegecampuses near midterms and finals is an effective way to reducestudent stress. They wondered if providing other animals would alsoreduce stress....
- Q A pharmaceutical company receives large shipments of aspirintablets. The acceptance sampling plan is to randomly select andtest 19 tablets. The entire shipment is accepted if at most 2tablets do not...
- Q Please show your answer and a draw the graphs.A radar unit is used to measure speeds of cars on a motorway.The speeds are normally distributed with a mean of 90...
- Q Let X1, X2, X3, X4, X5, and X6 denote the numbers of blue,brown, green, orange, red, and yellow M&M candies,respectively, in a sample of size n. Then these Xi's have...
- Q Multiple Linear Regression: Statisticsy = (6.7, 14.15, 62.11, 7.8, 7.9, 8.1)x1= (1.2, 4.5, 8.7, 3.3, 6.1, 7.2)x2= (1.11, 7.5, 4.2, 9.1, 7.4, 8.0)1). Construct 95% conï¬dence and prediction intervals for...
- Q A random sample of 366 married couples found that 286 had two ormore personality preferences in common. In another random sample of552 married couples, it was found that only 38...
- Q 7. The following is the number of passengers per ight in asample of 34 ightsfrom Ottawa, Ontario, to Hampton, Washington in 2018.78 73 75 99 50 58 25 56 57...
- Q Suspecting that television repair shops tend to charge womenmore than they do men, Emily disconnected the speaker wire on herportable television and took it to a sample of 12 shops....
- Q cross-sectional studies are also known as incidence surveys Trueor False
- Q Consider the following game:You start with $1. The game is overwhen you run out of money.You flip a coin-----Heads means thatyou win $1 and Tails means that you lose $1What...
- Q On January 1, an insurance company has 100,000 which is due toLinden as a life insurance death benefit. He chooses to receive thebenefit annually over a period of 15 years,...
- Q Use the t-distribution to find a confidence intervalfor a mean μ given the relevant sample results. Give the best pointestimate for μ, the margin of error, and the confidence interval.Assume...
- Q Regarding problem R2 from chapter 26. Make a box representing aroulette wheel with 18 tickets that represent red and 20 thatrepresent black or green. Draw 3800 times with replacement fromthis...
- Q A study by Bechtel et al., 2009, described in the Archives ofEnvironmental & Occupational Health considered polycyclicaromatic hydrocarbons and immune system function in beef cattle.Some cattle were near major oil-...
- Q Two catalysts in a batch chemical process, are being consideredfor their effect on the output of a process reaction. Based onliterature, data with different samples with catalyst 1 were foundto...
- Q Quantitative noninvasive techniques are needed for routinelyassessing symptoms of peripheral neuropathies, such as carpaltunnel syndrome (CTS). An article reported on a test that involvedsensing a tiny gap in an otherwise...
- Q CASE STUDY /big 4 Consultants has been appointed by a leadinggroup in hotel industry to prepare feasibility report for opening afive-star hotel in Ras al Khaima. The group had been...
- Q A toll-free phone number is available from 9 a.m. to 9 p.m. foryour customers to register complaints about a product purchasedfrom your company. Past history indicates that an average of...
- Q A random sample of 880 births included 433 boys. Use a 0.10significance level to test the claim that 50.8% of newborn babiesare boys. Do the results support the belief that...
- Q The data below are the average monthly temperatures, in °F, andthe monthly natural gas consumption, in ccf, for a household innorthwestern Pennsylvania.a.)Test the significance of the correlation coefficient using α=...
- Q A drugcompany tested three formulations of a pain relief medicine formigraine headache sufferers. For the experiment 27 volunteers wereselected and 9 were randomly assigned to one of three drugformulations. The...
- Q Following are the number of miles traveled for 30 randomlyselected business flights within the United States during 1999.1095, 925, 1656, 1605, 1503, 1928, 2030, 1418, 500, 1248,2047, 1027, 1962, 1027,...
- Q Assume that different groups of couples use a particular methodof gender selection and each couple gives birth to one baby. Thismethod is designed to increase the likelihood that each baby...
- Q If you were given a choice:Wide confidence interval with a small confidence levelWide confidence interval with a large confidence levelNarrow confidence interval with a small confidence levelNarrow confidence interval with...
- Q The Excel file Salary reports the monthly salaries for93 randomly and independently selected employees of a bank; thereare 32 salaries of male employees and 61 salaries of femaleemployees.  Let um =...
- Q An individual possesses r umbrellas that he employs in goingfrom his home to office, and vice versa. If he is at home (theoffice) at the beginning (end) of a day...
- Q Calculate the sample standard deviation and sample variance forthe following frequency distribution of heart rates for a sample ofAmerican adults. If necessary, round to one more decimal place thanthe largest...
- Q only 2 questions((PLSS with steps and clear hand written PLSSS and thank yousooooo much for helping me))DepressionGeographic locationGender3FloridaFemale7FloridaMale7FloridaFemale3FloridaFemale8FloridaFemale8FloridaMale8FloridaMale5FloridaFemale5FloridaMale2FloridaFemale6FloridaFemale2FloridaFemale6FloridaFemale6FloridaMale9FloridaFemale7FloridaMale5FloridaMale4FloridaMale7FloridaFemale3FloridaFemale8New YorkFemale11New YorkMale9New YorkMale7New YorkMale8New YorkFemale7New YorkMale8New YorkFemale4New YorkMale13New YorkFemale10New YorkMale6New YorkFemale8New YorkFemale12New...
- Q Ten measurements of impact energy on specimens of A238 steel at60 ºC are as follows: 64.1, 64.7, 64.5, 64.6, 64.5, 64.3, 64.6,64.8, 64.2, and 64.3 J.a. Use the Student’s t...
- Q B.38Â Â Average Size of a Performing Group in the Rock and Roll Hall ofFameFrom its founding through 2015, the Rock and Roll Hall of Famehas inducted 303 groups or individuals, and...
- Q Life expectancy in the US varies depending on where anindividual lives, reflecting social and health inequality byregion. You are interested in comparing mean life expectancies incounties in California, specifically San...
- Q 11.A computer manufacturer estimates that its cheapest screenswill last less than 2.8 years. A random sample of 61 of thesescreens has a mean life of 2.5 years. The population is...
- Q 3.For variables measured at the nominal level, what values canthe measures of association take on? What about variables at theordinal and interval/ratio levels?
- Q Review these Skill Builders (and all of the otherCourse Materials): -Evaluating p-values -Statistical Power Identifythe scenario you are evaluating and name the population. Estimatethe size of that population. Example: the...
- Q   You are studying the relationship between smokingand hair loss. You find a positive moderate effect size. Youconclude:A.there is clinical significanceB.the correlation between smoking and hair loss is between -0.3and -0.5C.   the...
- Q Does pollution increase mean death rate? A researcher sampled 31“unpolluted†areas greater than 50 km away from industrial plants,and 23 different “polluted†areas near industrial plants. Theaverage mortalities in the...
- Q Use R to complete the following questions. You should includeyour R code, output and plots in your answer.1. Two methods of generating a standard normal random variableare:a. Take the sum...
- Q The following regression output was obtained from a study ofarchitectural firms. The dependent variable is the total amount offees in millions of dollars.Predictor     CoefSE Coef      T     PConstant7.9872.9672.69-X10.122420.031213.920.0000X2-0.121660.05353-2.270.028X3-0.062810.03901-1.610.114X40.52350.14203.690.001X5-0.064720.03999-1.620.112Analysis of VarianceSource         DFSS    MS     F    PRegression53710.00742.0012.890.000Residual Error462647.3857.55Total516357.38X1 - # of...
- Q A researcher wants to test whether the mean lengths of twospecies of trout are the same. He obtains the weights of 10individuals of species A and 10 individuals of species...
- Q If the probability that a family will buy a vacation home inManmi, Malibu, or Newport is 0.25, 0.10, 0.35, what is theprobability the family will consummate one of these transactions?please...
- Q In the following problem, check that it is appropriate to usethe normal approximation to the binomial. Then use the normaldistribution to estimate the requested probabilities.What are the chances that a...
- Q You started taking the bus to work. The local transit authoritysays that a bus should arrive at your bus stop every five minutes.After a while, you notice you spend a...
- Q Professor Nord stated that the mean score on the final exam fromall the years he has been teaching is a 79%. Colby was in his mostrecent class, and his class’s...
- Q Shipments of TV sets that arrive at a factory have a varying levelsof quality. In order to decide whether to accept a particularshipment, inspectors randomly select a sample of 15...
- Q A study  examined whether ornot noses continue to grow throughout a person’slifetime.  The study included many measurements(including size of the nose as measured by total volume) andincluded multiple tests.  For each of the...
- Q The failure rate in a statistics class is 20%. In a class of 30students, find the probability that exactly five students willfail. Use the normal distribution to approximate the binomialdistribution.
- Q The pH of 20 randomly selected lakes is measured. Their averagepH is 5.7.Part A. Historically the standard deviation in the pH values is0.9. Use this standard deviation for the following...
- Q The mean number of pets per household is 2.96 with standarddeviation 1.4. A sample of 52 households is drawn. Find theprobability that the sample mean is less than 3.11.a.0.2245b.0.5676c. 0.3254d.0.7726
- Q For 300 trading​ days, the daily closing price of a stock​ (in$) is well modeled by a Normal model with a mean of​$197.12197.12 and a standard deviation of​$7.187.18. According to...
- Q Hale's TV Productions is considering producing a pilot for acomedy series in the hope of selling it to a major televisionnetwork. The network may decide to reject the series, but...
- Q Physical activity of obese young adults. In a study on thephysical activity of young adults, pediatric researchers measuredoverall physical activity as the total number of registeredmovements (counts) over a period...
- Q Please Double Check answers I've recived 3 wrong answers onthree diffrent questions today thank youCNNBC recently reported that the mean annual cost of autoinsurance is 1006 dollars. Assume the standard...
- Q A sample containing years to maturity and yield for 40 corporatebonds are contained in the data given below.Years to MaturityYieldYears to MaturityYield23.504.7573.752.76921.752.47312.006.29321.504.46417.507.41123.504.68418.003.55827.004.7998.250.94518.253.75523.252.96615.757.06814.751.4762.007.04310.001.3828.756.54023.006.3345.257.00015.250.88711.254.8234.754.81025.751.87418.001.23814.255.6543.006.76719.251.7459.503.74525.008.15317.504.1866.756.57117.005.99123.007.5069.507.32219.002.8575.504.87110.758.01027.502.40321.254.21426.004.500a. What is the sample mean years to maturityfor...
- Q 6) Suppose a multinomial regression model has two continuousexplanatory variables ?1 and ?2 ,and they are represented in themodel by their linear and interaction terms.a) For a ? unit increase...
- Q Playbill magazine reported that the mean annual household incomeof its readers is $120,255. (Playbill, January 2006). Assume thisestimate of the mean annual household income is based on a sampleof 80...
- Q According to a recent study annual per capita consumption ofmilk in the United States is 22.6 gallons. Being from the Midwest,you believe milk consumption is higher there and wish to...
- Q Suppose the life of a particular brand of calculator battery isapproximately normally distributed with a mean of 75 hours and astandard deviation of 9 hours.What is the probability that 9...
- Q Five students visiting the student health center for a freedental examination during National Dental Hygiene Month were askedhow many months had passed since their last visit to a dentist.Their responses...
- Q In a hypothesis test, the significance level α (alpha)represents the threshold for how unlikely sample data has to be,assuming the null hypothesis, in order for us to reject the nullhypothesis....
- Q Using the2 Superscript k Baseline greater than or equals n​rule, determine the number of classes needed for the followingdata set sizes.​a)nequals50​b)nequals400​c)nequals1250​d)nequals2500​a) The number of classes needed whennequals50isnothing.​b) The number of...
- Q Researchers sample 3000 households concerning tv shows they watch.Based on the sample 15% reported watching 60 minutes. What is the95% confidence interval for the proportion of all Americans thatwatch 60...
- Q The table below gives the number of hours spent unsupervisedeach day as well as the overall grade averages for seven randomlyselected middle school students. Using this data, consider theequation of...
- Q What answer could I use for having a low GPA?
- Q The following excerpt is from the racial profiling datacollection resource center In 2006, the New York City PoliceDepartment stopped a half-million pedestrians for suspectedcriminal involvement. Raw89 percent of the stops...
- Q \"Apple CEO wants to launch another high range phone at aprice point of 30% more than the current price. As a data scientistwhat will be your suggestion to him to...
- Q The owner of Maumee Ford-Mercury-Volvo wants to study therelationship between the age of a car and it selling price. Listedbelow is a random sample of 12 used cars sold at...
- Q Q #5 The computers of six faculty members in acertain department are to be replaced. Two of the faculty membershave selected laptop machines and the other four have chosendesktop machines....
- Q Download the dataset CARS1 from BlackBoard. a. Do not worryabout outliers. Assume the data is correct and any outliers willremain in the dataset. b. Do scatterplot and analyze the results.c....
- Q A standard deck of 52 cards is shuffled and dealt. Let X1 be thenumber of cards appearing before the first ace, X2 the number ofcards between the first and second...
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