Statistics question and answers for July 03, 2023
- Q Consider the following hypotheses:H0: μ = 38HA: μ ≠38Find the p-value for this test based on the followingsample information.a. x¯x¯ = 33; s = 11.9;n = 380.05 p-value <...
- Q The badge fabricator the sells all badges to county lawenforcement agencies claims each of its badges contains exactly60.00 milligrams of precious metal. You sample 38 badges and findthat the XÌ…...
- Q . Definitions: (do not have to turn in)a. Datab. Statisticsc.Populationd. Samplee. Voluntary response samplef. Parameterg.Statistich. Quantitative datai. Qualitative dataj. Discrete datak.Continuous datal. Nominal level of measurementm. Ordinal level ofmeasurementn. Interval...
- Q 4) An ANOVA model with 4 groups and 10 subjects in each grouphas a total SS equal to 400, and within SS equal to 300, The MSbetween and the F...
- Q Let's assume our class represents a normal population with aknown mean of 90 and population standard deviation 2. There are 100students in the class.a. Construct the 95% confidence interval for...
- Q A) The amount of tea leaves in a can from a particularproduction line is normally distributed with μ = 110 grams and σ =25 grams. What is the probability that...
- Q In a recent survey, 2033 people were surveyed as to how manypeople preferred Tinder and how many people preferred Happn (alocal dating website) and how many preferred Tinder in New...
- Q If STATCRUNCH can be used to solve this could someone explainthat as well please and thank you!!In a recent study on world​ happiness, participants were askedto evaluate their current lives...
- Q The undergraduate grade point averages​ (UGPA) of studentstaking an admissions test in a recent year can be approximated by anormal​ distribution, as shown in the figure. ​(a) What is theminimum...
- Q In a study of the accuracy of fast food​ drive-through orders,Restaurant A had 206 accurate orders and 57 that were not accurate.a. Construct a 95​% confidence interval estimate of the...
- Q A random sample size of n=10, population μ=65, σ=19.Determine P(x<68.9)Determine P(x ≥66.9​)
- Q Sally plays a game and wins with probability p. Every week, sheplays until she wins two games, and then stops for the week. Sallycalls it a \"lucky week\" if she...
- Q Specification for a medical device calls for a meanlifetime,  of more than 160 days. The manufacturer isinvestigating whether or not the lifetime of the device meets thisspecification. A random sample of...
- Q As a special promotion for its 20-ounce bottles of soda, a softdrink company printed a message on the inside of each cap. Some ofthe caps said, “Please try again,†while...
- Q A researcher reported the results of a telephone poll of 1000adult Americans. The question posed of those who were surveyed was:\"Should the federal tax on cigarettes be raised to pay...
- Q Acceptance sampling is an important quality control technique,where a batch of data is tested to determine if the proportion ofunits having a particular attribute exceeds a given percentage.Suppose that 11%...
- 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.Do you try to pad an...
- Q Suppose that Body Mass Index (BMI) for a population of30-60-year-old men follows a Normal distribution with mean 26, andstandard deviation 4. Q: Please calculate the range of BMI that 95%of...
- Q The lengths of lumber a machine cuts are normally distributedwith a mean of 99 inches and a standard deviation of 0.5 inch. ​(a)What is the probability that a randomly selected...
- Q 2. A team of market researchers conducted astudy involving 200 inhabitants of the United States to determinewhat people fear most. The gender of each person polled was noted,and then each...
- Q An elevator has a placard stating that the maximum capacity is2310 lblong dash15 passengers.​ So, 15 adult male passengers canhave a mean weight of up to 2310 divided by 15...
- Q The distribution of passenger vehicle speeds traveling on theInterstate 5 Freeway (I-5) in California is nearly normal with amean of 74.9 miles/hour and a standard deviation of 6.5miles/hour.(a) What proportion...
- Q In a survey of 1,000 adults in a country, 722 said that they hadeaten fast food at least once in the past month. Create a 95%confidence interval for the population...
- Q Please show workThe unemployment ratesin the United States duringA ten year period is given in the following table. Useexponential smoothing to find the best forecast for next year. Usesmoothing constants...
- Q According to AARP, in 2008, 49% of all annual expenditure onrestaurant food was by Americans age 50+. In fact AARP claims theaverage annual expenditure for Americans age 50+ on restaurant...
- Q Imagine that self report measure of creativity is normallydistributed with a mean of μ = 40 and a standard deviation of σ =51.What is the score that cuts off the...
- Q Assume that females have pulse rates that are normallydistributed with a mean of mu equals 76.0 beats per minute and astandard deviation of sigma equals 12.5 beats per minute. Completeparts​...
- Q Rolling doubles When rolling two fair, 6-sideddice, the probability of rolling doubles is 1/6. Suppose Eliasrolls the dice 4 times. Let W = the number of times herolls doubles. The...
- Q Under certain​ conditions, Swiss banks pay negativeinterest theycharge you.​ (You didn't think all that secrecy was​ free?)Suppose a bank​ \"pays\"minus−3.93.9​%interest compounded annually. Find the compound amount for adeposit of​$280 comma...
- Q Each year, ratings are compiled concerning the performance ofnew cars during the firs 90 days of use. Suppose that the cars havebeen categorized according to whether the card needs warranty-related...
- Q Two Ways ANOVAAn engineer suspects that the surface finish of a metal part isinfluenced by the feed rate and the depth of cut. She selects threefeed rates and four depths...
- Q The birth weights for two groups of babies were compared in astudy. In one group the mothers took a zinc supplement duringpregnancy. In another group, the mothers took a placebo....
- Q Data from a cloud-seeding experiment are in the file CLOUDS onthe course website. The file contains rainfall in acre-feet from 52clouds: 26 of which were chosen at random and seeded...
- Q A crop scientistevaluating lettuce yields plants 20 plots, treats them with a newfertilizer, lets the lettuce grow, and then measures yield innumbers of heads per plot, with these results: 145,...
- Q Among drivers who have had a car crash in the last year, 130were randomly selected and categorized by age, with the resultslisted in the table below. Age Under 25 25-44...
- Q A random sample of 854 births included 431 boys. Use a 0.05significance level to test the claim that 51.4​% of newborn babiesare boys. Do the results support the belief that...
- Q Dr. Strangelove has created a device that predicts whether ornot a missile has been launched. Given that a missile has beenlaunched, the device will correctly report that a missile has...
- Q A coffee machine fills a cup automatically with a volume ofcoffee normally distributed with expectation 2.2dl and standarddeviation 0.3dl. The cups used can take a volume of coffee withexpectation value...
- Q 5. Nineteen people move out of a neighborhood; four areminorities. Of the nineteen, eight move onto a block with newhousing, and one of these eight is a minority. How likely...
- Q You know that the definition of the variance is Var[X] = 1 n − 1Z ∞ −∞ (Xi − µ) 2 dFX(x), so if we have a plug-in estimator S...
- Q Research Question: Is the average weight (in grams) of allEmerald Ash Borer Beetle less than 3. To help, my Uncle Superfly(who happens to be a biologist) took a random sample...
- Q A construction company in Naples, Florida, is struggling to sellcondominiums. In order to attract buyers, the company has madenumerous price reductions and better financing offers. Althoughcondominiums were once listed for...
- Q Let x1, x2,x3,and x4 be a random sample frompopulation with normal distribution with mean ? and variance ?2 .Find the efficiency of T = 17 (X1+3X2+2X3 +X4) relative tox= x/4...
- Q 1. A study of a disease reveals that there is an average of 1case every 22 square miles. Residents of a town that has an area of10 square miles are...
- Q A researcher wants to compare the levels of recall in youngerand older subjects. Her hypothesis is that if subjects are requiredto process verbal information (lists of words) older subjects doless...
- Q Deacribe the properties of a good stimator in your own words. Whyare these factors important for an estimator?
- Q In a study of heart surgery, one issue was the effect of drugscalled beta-blockers on the pulse rate of patients during surgery.The available subjects were divided at random into two...
- Q PLEASE SHOW THE DIAGRAM8. The mean pulse rate for adults is 72 beats per minute(www.healthepic.com) and let’s suppose that the standard deviationis 10. Find:a. The probability that a randomly chosen...
- Q As a part of a study, a chemical plant sampled the amount ofchemicals in the soil surrounding their building. Samples weretaken in front of the building (sample 1) and samples...
- Q Particles are a major component of air pollution in many areas.It is of interest to study the sizes of contaminating particles.Let X represent the diameter, in micrometers, of a randomly...
- Q An experimenter flipsa coin 100 times and gets 62 heads. We wish to test the claim thatthe coin is fair (i.e. a coin is fair if a heads shows up...
- Q Crossett Trucking Company claims that the mean weight of itsdelivery trucks when they are fully loaded is 5,300 pounds and thestandard deviation is 170 pounds. Assume that the populationfollows the...
- Q Assume that the helium porosity (in percentage) of coal samplestaken from any particular seam is normally distributed with truestandard deviation 0.77.(a) Compute a 95% CI for the true average porosity...
- Q A software company is trying to use Bayes Theorem and otherrules of probability to develop an algorithm that can effectivelyfilter out spam emails. The company’s software developers carefullyexamined a random...
- Q 1)Â Â Â Â Â A personal director isinterested in studying the relationship (if any) between age andsalary. Sixteen employees are randomly selected and their age andsalary are recorded.AGE AND SALARYAGESALARY (in Thousands of...
- Q 7. A consumer psychologist wishes to determine whether playingmusic increases sales at a local department store. To this end, thepsychologist has the owner play either no music, soft rock, orclassical...
- Q F6: In a waiting line situation, arrivals occur around the clockat a rate of six per day, and the service occurs at one every threehours. Assume the Poisson and exponential...
- Q A carpet company advertises that it will deliver your carpetwithin 15 days of purchase. A sample of 49 past customers is taken.The average delivery time in the sample was 16.2...
- Q A testing center at the university wants to compare the averagetest taking time of undergraduate students on a standardizedentrance exam to graduate school. Four departments are selected,and from each department,...
- Q A random sample of Midsize Sedans’ Miles per Gallon (mpg) wererecorded andthe                  data is listed below. Assume the miles per gallon are normallydistributed:24.6     30.2     29.9     33.1     26.728.5     31.6     36.3     24.4     28.7Calculate the mean (1 pt):Calculate the standard...
- Q A kinesiologist wanted to investigate the effect oftemperature and humidity on human performance. He found 28 collegestudents and randomly assigned them to four different conditions,during which they were to walk...
- Q Research into the relationship between hours of study and gradesshows widely different conclusions. A recent survey of graduateswho wrote the Graduate Management Admissions Test (GMAT) had thefollowing results.​Hours Studied (...
- Q 29-34. Matching – fill in the blank with the correct responsefrom A-E below:A). ANOVA B). Pearson’s r C). Chi Square D). MultipleRegression E). t-test29. ______ This parametric test analyzes the...
- Q A study looked at number of cavity children per 100 in 18 NorthAmerican cites before and after public water fluoridation projects.The following table lists the data.CityBeforeAfter149.218.223021.93165.2447.820.453.42.8616.821710.711.385.76.1923251017131179761266591346.825.61484.950.41565.241.2165221175032181220a. Please test whether there...
- Q Thane Company is interested in establishing the relationshipbetween electricity costs and machine hours. Data have beencollected and a regression analysis prepared using Excel. Themonthly data and the regression output follow:...
- Q What sport games does it have 8 or more than 8 teams in onegroup where a round robin game sequence takes place? (that is, theteams play against each other once...
- Q Suppose we are interested in examining the social basis ofsupport for capital punishment. Could there be a relationshipbetween religion (the independent variable) and support for capitalpunishment (dependent variable)? Suppose we...
- Q Calculating the probability that in a class of 20 students,there are at least two with the same birthday.(a) First, calculate the probability that each student has adifferent birthday as follows...
- Q 3. In the workbook on page 14, we solved the followingproblem:A new type of light bulb has been developed which is believed tolast longer thanordinary light bulbs. To determine the...
- Q 2. Rossi et al. (2013) studied the relationship betweencholesterol level and hypertension. They comparedthetotal cholesterol measurements (mg/dl) for 15 patients with primaryhypertension (PH) and another15patients who were normotensive (NT). The...
- Q A bridal shop is slow with deliveries. If Karen orders her dress6 months before her rehearsal dinner, there is a 75% chance thatthe dress will arrive on time for her...
- Q Problem 6 The unemployment rate (UR) for PEI by quarter was asfollows:                                   UR         T(Time)Year   Quarter           Rate    For Regression2018   Q1                  12.0                1           Q2                  7.1                  2           Q3                  8.2                  3           Q4                  10.2                42019   Q1                  12.2                5           Q2                  6.9                  6           Q3                  7.1                  7           Q4                  9.9                  8Sketch this data on a graph. Is there seasonality in thedata?Use a four quarter moving...
- Q Wall Street traders are anxiously waiting for the federalgovernment’s release of the August numbers for nonfarm payrolls.Last year month of August showed an average of 120,000 new jobswith a standard...
- Q The following is asummary of data for 960 branch managers in the two major regions ofa Canadian Bank:EducationLevelDomesticRegionInternationalRegionTOTALNo Degree12020140Bachelor’s Degree420100520Post-graduateDegree25050300TOTAL7901709601.  Statethe null and alternative hypotheses for a Chi Square test...
- Q A manufacturer wants to compare the number of defects on the dayshift with the number on the evening shift. A sample of productionfrom recent shifts showed the following defects: Day...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!