Statistics question and answers for July 31, 2023
- Q cenarioCertified Behavior Analysts claim that their procedures are moreeffective than any other.  Their procedures are clear-cutanalytics that anyone can learn and apply. It’s not an art theyproclaim, but a science.  You decide...
- Q A manufacturer knows that their items have a normallydistributed lifespan, with a mean of 7.8 years, and standarddeviation of 0.7 years.If you randomly purchase one item, what is the probability...
- Q Students in a statistics class took their first test. Thefollowing are the score they earned. Create a histogram for thedata and describe the findings Scores(62,87,81,69,69,87,60,45,95,76,76 62,71,65,67,67,72,80,40,77,87,5884,73,90,64,64,89)a)Find the mean, median, and...
- Q We wish to create a 95% confidence interval for the proportion.A sample of 50 gives a proportion of 0.2. Find theupper value for the confidence interval. Round to3 decimal places.
- Q 1. Consider the experiment of first drawing one card from asingle suit and then rolling a single diea. How many simple events are possible ?b. List the out sample space...
- Q Many people believe that the average number of Facebook friendsis 135. The population standard deviation is 37.7. A random sampleof 38 high school students in a particular county revealed that...
- Q The following data are from an experiment designed toinvestigate the perception of corporate ethical values amongindividuals who are in marketing. Three groups are considered:management, research and advertising (higher scores indicate...
- Q In a survey of 1373 ​people, 930 people said they voted in arecent presidential election. Voting records show that 65​% ofeligible voters actually did vote. Given that 65​% of eligiblevoters...
- Q Students in Physics and Chemistry a random sample was takenfrom 20 students in Physics, from which an average of 3 hours perweek was obtained with a deviation. typical of 2.5...
- Q Consider the paired sample {(3, 1),(3, 5),(6, 6),(6, 8),(7,10)}. Do the following by hand (you may use a basic calculator, butnot a statistical program).(a) Find estimates βˆ 0 and βˆ...
- Q Question 5An urban planner is researching commute times in the SanFrancisco Bay Area to find out if commute times have increased. Inwhich of the following situations could the urban planner...
- Q A random sample of ?n measurements was selected from apopulation with standard deviation ?=11.7 and unknown mean ?.Calculate a 95% confidence interval for ? for each of the followingsituations:(a) ?=60,...
- Q For this problem, carry at least four digits after the decimalin your calculations. Answers may vary slightly due torounding.In a random sample of 67 professional actors, it was found that...
- Q Ten males and ten females were interviewed for a mid-levelmanagement position and their interview times were recorded inminutes . Shown below are descriptive statistics for the males andfemales. Your task...
- Q a. Using the original values, compute theEuclidean distance between the first two observations. (Roundintermediate calculations to at least 4 decimal places and yourfinal answer to 2 decimal places.)Euclidean distance between...
- Q The mean age of Senators in the 109th Congress was 60.35 years.A random sample of 40 senators from various state senates had anaverage age of 55.4 years, and the population...
- Q A. Suppose we test the proportions of people who like having acup of coffee early in the morning for two populations:H0 : p1=p2 vs Ha :p1< p2. The samplesizes for...
- Q You plan on exposing 9 strains of bacteria (labelled A - I) to amutagen. You hypothesize that mutagen A induces more mutations thanmutagen B. Following each exposure, you count the...
- Q Code needed in C++, make changes to the file provided (18-1, has3 files)Chapter 18 Stacks and Queues-----------------------------------------------------------------------------------------------------capacity is just 51. push 6 numbers on the stack2. catch the overflow error...
- Q What is the relationship between the attendance at a majorleague ball game and the total number of runs scored? Attendancefigures (in thousands) and the runs scored for 11 randomly selectedgames...
- Q 2. (25pts) The decrease in cholesterol level after eating acertain brand of oatmeal for breakfast for one month in people withcholesterol levels is Normally distributed. A random sample of 25adults...
- Q Suppose I have a 99% confidence interval of 6±2. Someone says,“Hey! I think µ = 3!†What should I say to them?A. I am 100% sure that you are wrong,...
- Q Use the following information for the next fourproblems. A researcher is interested in estimating themean salary of public school teachers in a particular region. Arandom sample of 9 teachers is...
- Q Show all work for credit (Include original formulas,hypotheses, rejection criteria, decision, and statement incontext).A comparative study of four methods for treating hyperactivityin children was performed in 16 children.  After thetreatment, hyperactivity...
- Q 1. Out of 200 people sampled, 92 had kids. Based on this,construct a 99% confidence interval for the true populationproportion of people with kids.Give your answers as decimals, to four...
- Q Assume that 40% of graduates come from University A and and earnsalaries of 30,000 on average with a standard deviation of 5,000.The remainder come from University B and earn salaries...
- Q The following random sample was selected from a normaldistribution: 4, 6, 3, 5, 9, 3.a. Construct a 90% confidence interval for the populationmean.b. Construct a 95% confidence interval for the...
- Q A makeup test is given and the average (μX) score out of 100 was85.0, with a SD (σX) of 3.0. Assuming a normal distribution, findthe dividing line (test scores) between...
- Q A test is given and the average (μX) score out of 100 was only a53.1, with a SD (σX) of 8.9. Assuming the grades followed a normaldistribution, use the Z...
- Q Given the data below, what is the upper control limit for theMoving Range control chart? Please enter your answer with at least4 significant digits.Data:Observation132.4654118.9743124.6528130.3063144.1334118.4584135.1793115.2477138.6022104.4394128.8716133.7959113.2013120.4394142.4859123.592135.9269123.5473139.3181138.444135.2332125.4248123.4138138.3623120.3414126.7968126.2955138.4302133.506115.1217119.105136.3829142.9304146.3562115.0906147.2637143.7961140.0805
- Q Consider the following data to be used in a regression. xi yi 10 2 10 3 25 4 30 5 35 (a) Find the values of b0 and b1.(b) Find...
- Q Let the random variable X follow a normal distribution with amean of μ and a standard deviation of σ. Let 1 be the mean of asample of 36 observations randomly...
- Q Use the following scenario to answer the questions below:A campaign manager for a local politician is interested in thepercentage of Leon County residents who intend to vote in the 2020elections...
- Q 7. In a survey sample of 83 respondents, about 30.1 percent ofthe sample work less than 40 hours per week. Calculate a 99 percentconfidence interval for the proportion of persons...
- Q In an effort to characterize the New Guinea crocodile(Crocodylus novaeguineae), measurements were taken of the dorsalcranial length (mm) (the length of the skull from the tip of thenose to the...
- Q I would like to see a proof of the Central Limit Theorem thatapplies to a simple probability dice scenerio, say rolling a 6 xamount of times. The goal is to...
- Q After preliminary testing, it is determined that .01 of theresidents of Selma have a certain virus. In Sangrian, a suburb ofSelma (incidence of the virus is the same), the authorities...
- Q Fiction Cruiseline offers three ways to exercise on their cruiseships. 73 of the 86 passengers participated in at least one methodof exercise. 36 people went rock climbing, 44 people went...
- Q Suppose X1, . . . , Xn is a random sample from the Normal(μ, σ2)distribution, where μ is unknown but σ2 is known, and it is ofinterest to test H0:...
- Q A researcher wants to determine whether high school students whoattend an SAT preparation course score significantly different onthe SAT than students who do not attend the preparation course. Forthose who...
- Q A new program of imagery training is used to improve theperformance of basketball players shooting free-throw shots. Thefirst group did an hour imagery practice, and then shot 30 freethrow basket...
- Q 6.42 Let X1,..., Xn be an i.i.d. sequence of Uniform (0,1)random variables. Let M = max(X1,...,Xn).(a) Find the density function of M. (b) Find E[M] and V[M].
- Q A printing shop that produces advertising specialties producespaper cubes of various sizes, of which the 3.5 inch cube is themost popular. The cubes are cut from a stack of paper...
- Q You may need to use the appropriate appendix table or technologyto answer this question.Consider the following hypothesis test.H0: μ = 15Ha: μ ≠15A sample of 50 provided a sample...
- Q Question Four An academic conference held this past January consistent of 250participants including undergraduate students, masters students,PhD students, and, professors from business faculties, engineeringfaculties, and nursing faculties to discuss various...
- Q Consider the following hypothesis test.H0: μ ≤ 12Ha: μ > 12A sample of 25 provided a sample meanx = 14and a sample standard deviations = 4.57.(a)Compute the value of the...
- Q Suppose that weeklyexpenses for two student organizations are thought to be similar. Arandom sample of 10 weeks yields the following weekly expenses foreach organization:OrganizationAÂ Â Â Â Â Â Â Â Â Â Organization BÂ Â Â Â $119.25Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â $ 111.99Â Â Â Â $123.71Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â $...
- Q A bank presidentclaims that the median of debt-to-equity ratio of commercial loansprovided is less than 5. A random sample of 15 commercial loans isselected with the following values for this...
- Q A small branch bank has two tellers, one for deposits and onefor withdrawals. Customers arrive at each teller’s window with anaverage rate of 18 customers per hour. (The total customer...
- Q In analyzing hits by bombs in a past war, a city was subdividedinto 471 regions, each with an area of 0.5-km². A total of 390bombs hit the combined area of...
- Q 1. A random sample of 40 college student students shows that thescore of a College Statistics is normally distributed with itsmean, 81 and standard deviation, 8.4. Find 99 % confidence...
- Q The data in the worksheet provides the number of defectsproduced in a series of panels. a. Construct a C-chart for thisprocess. b. Does the process appear to be in control?...
- Q An article contained the following observations on degree ofpolymerization for paper specimens for which viscosity timesconcentration fell in a certain middle range:415421422422425427430435436439446446448453457462464(a) Construct a boxplot of the data.Comment on any...
- Q The Student's t distribution table gives criticalvalues for the Student's t distribution. Use anappropriate d.f. as the row header. For aright-tailed test, the column header is the value ofα found...
- Q As a binomial question: Flip a coin twice. The probability ofobserving a head is 50%, what is the probability that I observe 1head? binompdf (n, p, x) so binompdf( 2,...
- Q A manufacturer of potato chips would like to know whether itsbag filling machine works correctly at the 409.0 gram setting.Based on a 36 bag sample where the mean is 414.0...
- Q A study of arrival times for a number of international flights.The times were randomly recorded from a normally distributedpopulation with the following results:n = 19 and s = 12.1. Find...
- Q You are interested in knowing the proportion of people that areobserving the CDC guidelines for social distancing during theCOVID-19 pandemic. You survey 100 randomly selected people and findthat 80 have...
- Q To ensure Fork-lifts are not over-loaded, design engineers haveto consider the weights of cargo. Suppose 400 cargo shipments havenormally distributed weights with a mean of 500 pounds and astandard deviation...
- Q One representative from the CDC claimed that as many as 25% ofpeople who have Covid-19 may not be showing any symptoms. If thisis true, what is the probability of randomly...
- Q The average time to run the 5K fun run is 21 minutes and thestandard deviation is 2.5 minutes. 13 runners are randomly selectedto run the 5K fun run. Round all...
- Q Using the data from the previous question on LDL cholesterol,you decide to test if the variance in LDL cholesterol of patientsadmitted to the hospital with a heart attack is the...
- Q Trevor is interested in purchasing the local hardware/sportinggoods store in the small town of Dove Creek, Montana. Afterexamining accounting records for the past several years, he foundthat the store has...
- Q Data Set: 5, 9, 11, 14, 15, 17, 19, 23-Construct a frequency table using 5 as a starting point and aclass of width 7-Construct a relative frequency histogram. Include themidpoints...
- Q A certain virus infects one in every 400 people. A test used todetect the virus in a person is positive 85% of the time if theperson has the virus and...
- Q The data presented in the table below resulted from anexperiment in which seeds of 4 different types were planted and thenumber of seeds that germinated within 4 weeks after planting...
- Q s According to the 2010 Census, 12.8% of allhousing units in the United States were vacant. A countysupervisor wonders if her county is different from this. Sherandomly selects 180 housing...
- Q Consider the data.xi31262014yi6540601520The estimated regression equation for these data isŷ = 75.75 − 3.25x.(a)Compute SSE, SST, and SSR using equationsSSE = Σ(yi −ŷi)2,SST = Σ(yi −y)2,andSSR = Σ(ŷi −y)2.SSE =...
- Q In a survey of 1066 ​adults, a poll​ asked, \"Are you worried ornot worried about having enough money for​ retirement?\" Of the 1066​surveyed, 566 stated that they were worried about...
- Q The average number of accidents at controlled intersections peryear is 4.3. Is this average less for intersections with camerasinstalled? The 43 randomly observed intersections with camerasinstalled had an average of...
- Q An engineer is designing a battery for use in a device that willbe subjected to some extreme variations in temperature. The onlydesign parameter that he can select at this point...
- Q Chrysler Concorde: AccelerationConsumer reports stated that the mean time for a ChryslerConcorde to go from 0 to 60 miles per hour was 8.7 seconds.a.) If you want to set up...
- Q Your goal is to collect all 80 player cards in a game. ThePlayer cards are numbered 1 through 80. High numbered cards arerarer/more valuable than lower numbered cards.Albert has a...
- Q A manufacturer produces widgets whose lengths are normallydistributed with a mean of 8.7 cm and standard deviation of 2.5cm.A. If a widget is selected at random, what is the probability...
- Q The mean height of an adult giraffe is 18 feet. Suppose that thedistribution is normally distributed with standard deviation 0.8feet. Let X be the height of a randomly selected adult...
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!