Statistics question and answers for August 11, 2023
- Q sorry for spamming multiplesThe amount of time adults spend watching television is closelymonitored by firms because this helps to determine advertisingpricing for commercials. Complete parts​ (a) through​ (b).​(a) According to...
- Q A jar contains 38 red marbles numbered 1 to 38 and 44 bluemarbles numbered 1 to 44. A marble is drawn at random from the jar.Find the probability of the...
- Q There is a river whose average daily flow Q follows a normaldistribution. The average flow is 8000 cfs and the standarddeviation is 1000 cfs. Determine the following:(a) The probability that...
- Q To do this assignment, choose a statistical model from the listbelow and come up with a hypothetical study related to yourresearch interests that could be conducted using the model.Assignment must...
- Q 8. (6) Researchers believe that human male infertilityhas increased significantly in recent years due to exposure to BPAand related chemicals. A recent study provided evidence for this byinterviewing lab technicians...
- Q To determine if their 3.00 centimeter industrial belts areproperly adjusted, Hutcheson & Gregory Inc. has decided to usean x‾-Chart which uses the range to estimate the variability in thesample.Table:Periodobs1obs2obs3obs4obs5obs6Sample MeanSample...
- Q Which of the given is not a requirement for thevalidity of the chi‑square goodness‑of‑fit test?1) independent observations2) all observations falling into one of k outcome classes3) a fixed number of...
- Q Kevin retired on 1/1/2020 and started to withdraw $2500 at theend of each month from an account (which earns 2.35% interestcompounded monthly) containing $439,979.16. If Kevin keeps onmaking the set...
- Q At a local college, 65 female students were randomly selectedand it was found that their mean monthly incomewas $609. Seventy-five male students were also randomly selectedand their mean monthly income...
- Q Replacement times for TV sets are normally distributed with amean of 8.2 years and a standard deviation of 1.1 years. (Changethe final answer to a % and keep 2 decimal...
- Q 10. The grades of students are normal distributed. In a class of10 students the average grade on a quiz is 16.35, with a standarddeviation of 4.15. ( 3 marks )...
- Q 1. using the following data set, write a null hypothesis. Recordboth a generic version (through the use symbols)and an English version (using words) – for thegeneric version.2. Compose an alternative...
- Q A story spoiler gives away the ending early. Does having a storyspoiled in this way diminish suspense and hurt enjoyment? Astudy1 investigated this question. For twelve differentshort stories, the study’s...
- Q A genetic experiment with peas resulted in one sample ofoffspring that consisted of 404 green peas and 161yellow peas.a. Construct a 95​% confidence interval to estimate of thepercentage of yellow...
- Q Slot machines are the favorite game at casinos throughout theUnited States (Harrah’s Survey 2002: Profile of the AmericanGambler). A local casino wants to estimate the difference in thepercent of women...
- Q A CI is desired for the true average stray-load loss μ(watts) for a certain type of induction motor when the line currentis held at 10 amps for a speed of...
- Q What is the probability that if a pair of dice is rolledeighteen times, exactly three sums of seven are rolled? (Round youranswer to four decimal places.)
- Q In a test of a new medication, 65 out of 98 males and 45 out of85 females responded positively. At the 0.05 level of significance,can we say that the drug...
- Q Problem 1: A new program of imagery training isused to improve the performance of basketball players shootingfree-throw shots. The first group did an hour imagery practice, andthen shot 30 free...
- Q The following data set represents the final grades assigned in astatistics course. The grades are as followed, 60, 50, 85, 85, 85,90, 100, 70, 83, 92, 68, 70, 88, 88,...
- Q Alocal shoe company claims that the average yearly salary of itsworkers is $19,800. The union believes that the average salary ismuch less. A random sample of 64 employees shows their...
- Q Cards: Suppose you draw one card from a singledeck of cards.(a) What is the probability that you draw an queen?Round your answer to 3 significant digits*.(b) What is the probability...
- Q A. what type of test should be used and why?B. Compose a null hypothesis to accompany the test. Record botha generic version (through the use symbols) and anEnglish version (using...
- Q A survey of 900 adults from a certain region​ asked, \"What doyou buy from your mobile​ device?\" The results indicated that 48​%of the females and 40​% of the males answered...
- Q Find the 80%, 95%, and 99% confidence intervals & marginerrorCreate your own confidence interval (you cannot use 80%, 95%,and 99%) and make sure to show your work. Make sure to...
- Q A publisher reports that 54% of their readers own a personalcomputer. A marketing executive wants to test the claim that thepercentage is actually over the reported percentage. A randomsample of...
- Q Cards: Suppose you draw two cards withreplacement. Round your answers to 3 significantdigits*.(a) What is the probability of getting a queen then a queenagain?P(queen on the first and queen on...
- Q Melons from a certain large distributor have diameters thatfollow an approximately normal distribution with a mean of 133millimeters (mm) and a standard deviation of 5 mm.a. If a melon from...
- Q X ~ N(60, 12). Suppose that you form randomsamples of 25 from this distribution. LetXbe the random variable of averages. Let ΣX be therandom variable of sums.Find the 20th percentile....
- Q Does knee height predict overall height? Sinceelderly people may have difficulty standing to have their heightsmeasured, a study looked at predicting overall height (y) incentimeters, from height to the knee...
- Q Data sent over the internet are broken up into electronicpackets that may take a variety of different paths to reach theirdestination, where the original data is reassembled. Suppose thenodes in...
- Q A single-sampling plan has ? = 0.01, ? = 0.01, ?2 = 0.05, and ?= 0.02. What should be the sample size ? and acceptance number??
- Q Question: How Much do Uber drivers make per hour?On its blog, Uber posted a scatterplot of several thousanddrivers in New York City. The scatterplot shows each's driver'saverage earnings per hour...
- Q Discuss the influence of: (a) the two mean values; (b) the twostandard deviations; and (c) the number of data points for eachdata set in the statistical analysis that seeks to...
- Q How do we determine whether the actual slope of the regressionline is not zero?
- Q 17. According to a survey of the top 10 employers in a majorcity in the Midwest, a worker spends an average of 240 minutes aday on the job. Suppose the...
- Q The mean height of an adult giraffe is 19 feet. Suppose that thedistribution is normally distributed with standard deviation 0.9feet. Let X be the height of a randomly selected adult...
- Q The CEO of a company wants to estimate the percent of employeesthat use company computers to go on Facebook during work hours. Heselects a random sample of 200 of the...
- Q Given an array A of n distinct numbers, we say that a pair ofnumbers i, j ∈ {0, . . . , n − 1} form an inversion of A...
- Q Suppose that, in an urban population, 50% of people have noexposure to a certain disease, 40% are asymptomatic carriers, and10% have the disease with symptoms. In a sample of 20...
- Q A certain flight arrives on time 89 percent of the time. Suppose148 flights are randomly selected. Use the normal approximation tothe binomial to approximate the probability that​(a) exactly 134 flights...
- Q Do male and female skiers differ in their tendency to use a skihelmet? Ruzic and Tudor (2011) report a study in which 710 skierscompleted a survey about aspects of their...
- Q Shortly after September 11th 2001, a researcher wanted todetermine if the proportion of females that favored war with Iraqwas significantly different from the proportion of males thatfavored war with Iraq....
- Q Almost all medical schools in the United States require studentsto take the Medical College Admission Test (MCAT). To estimate themean score ?μ of those who took the MCAT on your...
- Q 1.Two dice are tossed 432 times. How many times would youexpect to get a sum of 5?———-2.Sam is applying for a single year life insurance policyworth $35,750.00. If the actuarial...
- Q A manager at a furniture production plant created an incentiveplan for her carpenters in order to decrease the number of defectsin the furniture production. She wants to check if the...
- Q Independent simple random samples from two strains of mice usedin an experiment yielded the following measurements on plasmaglucose levels following a traumatic experience: Strain A: 54; 99;105; 46; 70; 87;...
- Q According to a global Nielson report, 66% of North Americans paymore attention to the nutritional information on a package thanthey did two years ago. A random sample of 400 individuals...
- Q 3. Are younger drivers more likely to have accidents in theirdriveways? Traffic engineers tabulated types of car accidents bydrivers of various ages. Out of a total of 82,486 accidentsinvolving drivers...
- Q Let x be a random variable that represents red bloodcell count (RBC) in millions of cells per cubic millimeter of wholeblood. Then x has a distribution that is approximatelynormal. For...
- Q Nacirema Airlines is buying a fleet of new fuel-efficientplanes. The HogJet and the LitheJet both meet their price andperformance needs, and both planes meet EPA noise guidelines.However, the quieter plane...
- Q a. In your own words, what is meant by the statement thatcorrelation does not imply causality.b.In your own words, please describe the difference betweenregression equation y=Bo+B1x and the regression equation^y=bo+b1x?
- Q A sales manager collected the following data on annual sales fornew customer accounts and the number of years of experience for asample of salespersons. Salesperson Years of Experience AnnualSales ($1000s)1...
- Q A marine biologist claims that the mean length of mature femalepink seaperch is different in fall and winter. A sample of 6 maturefemale pink seaperch collected in fall has a...
- Q Let the random variable X represent a student’s score on an IQtest. Suppose that student IQ scores are Normally distributed witha mean of 100 and a standard deviation of 15.Part...
- Q An oil company purchased an option on land in Alaska.Preliminary geologic studies assigned the following priorprobabilities:P(high-quality oil) = .3P(medium-quality oil) =.5P(no oil) = .2a. What is the probability of finding...
- Q 1. Maggie buys an MP3 player and loads 10 songs on it: 3 rock, 6pop, and 3 country songs. She listens to the first two songs inshuffle mode, which picks...
- Q Please complete the following problems. Show as much work as youcan, and complete the problems as neatly as possible. The x in [x]after each problem denotes the point value.For each...
- Q Health experts’ estimate for the sensitivity of coronavirustests, as they are actually used, is 0.7. They also think thespecificity is very high. Suppose specificity is 0.99 and that thehealth experts’...
- Q Mr. Acosta, a sociologist, is doing a study to see if there is arelationship between the age of a young adult (18 to 35 years old)and the type of movie...
- Q 3. Using the same table from class (or Appendix C in Priviterra,pp. C1-C4), find the proportion under the standard normal curvethat lies between each of the followingpoints:The mean and z...
- Q A government agency hires you to provide consulting on new rulesregarding vehicle license plates. The agency is considering anall-numbers license plate that has six slots (digits 0-9 with noduplicate digits...
- Q Pesticides sprayed on crops can affect human beings. A symptomof the action of a pesticide is reductionin brain acetylcholinesterase (AChE) activity, and a severereduction can be dangerous in terms of...
- Q 3. Consider the quality of cars, asmeasured by the number of cars requiring extra work after assembly,in each day’s production for 15 days:    30, 34, 9, 14, 28, 9, 23,...
- Q 1. Listed below are the lead concentrations innug/gmeasured jn different traditional medicines. Use a 0.01significance level to test the claim that the mean leadconcentration for all such medicines is less...
- Q Assuming the degreesof freedom equals 27, select the t value from the t table.
- Q Here are the summary statistics for randomly selected weights ofnewborn girls: n=237, mean=33.8 hg, and s=6.2 hg. Construct aconfidence interval estimate of the mean. Use a 90% confidencelevel
- Q Describe a situation where you would use ANOVA by stating 1. thequantity of populations that are to be investigated, 2 aquantitative variable on these populations, 3 the sizes of samplesfrom...
- Q 21. Teaching Methods A new method of teaching reading is beingtestedon third grade students. A group of third grade students is taughtusingthe new curriculum. A control group of third grade...
- Q The accuracy of a census report on a city in southern Californiawas questioned by some government officials. A random sample of1215 people living in the city was used to check...
- Q Are there any significant associationbetween students’ spatial reasoning ability and verbal ability?Note: Verbal ability scores are the ranks.(Use Data A)Compute the statistic needed to answer the researchquestion. Tip: Use Spearman...
- Q Anystate Auto Insurance Company took a random sample of 386insurance claims paid out during a 1-year period. The average claimpaid was $1585. Assume σ = $256.Find a 0.90 confidence interval...
- Q When hypothesis testing, when might you use a related sampleversus an independent sample? Provide examples of both populationto illustrate the differences.
- Q A report states that adults 18- to 24- years-old send andreceive 128 texts every day. Suppose we take a sample of 25- to 34-year-olds to see if their mean number...
- Q Suppose that 26 of 200 tires of brand A failed to last 30,000miles whereas the corresponding figures for 200 tires of brands B,C, and D were 23, 15, and 32....
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!