Statistics question and answers for August 07, 2023
- Q The mean drying time of a certain paint in a certain applicationis 12 minutes. A new additive will be tested to see if it reducesthe drying time. One hundred specimens...
- Q An English professorassigns letter grades on a test according to the followingscheme.A: Top 9% ofscoresB: Scores below thetop 9% and above the bottom 63%C: Scores below thetop 37% and above...
- Q A university financial aid office polled a random sample of 528528 male undergraduate students and 651 651 female undergraduatestudents. Each of the students was asked whether or not they wereemployed...
- Q the statement of the problem:\"Buses arrive at a bus station at a rate 2 buses per minute. thearrival of buses occurs at random times according to a Poissonscatter on (0,...
- Q 1. Which of the following statements is NOTtrue about a one-way ANOVA?If you know SSbetween and SSwithin, you can calculateSStotal.If you know MSbetween and MSwithin, you can calculateMStotal.If you know...
- Q 9) (mean) $46 $29 S (Standard Deviation) $ 9 $ 8 Xi (Number ofstudents who are making >$30,000 annually) $10 $ 9 n (SampleSize) 37 26 a) Is there any...
- Q Two teaching methods and their effects on science test scoresare being reviewed. A random sample of 13 13 students, taught intraditional lab sessions, had a mean test score of 74.8...
- Q STUDY 4The university is building a number of active learningclassrooms and came across a chair called the Ruckus Stool that isdesigned specifically for collaborative work. The design allowsusers to comfortably...
- Q Information on a large packet of seeds indicates that thegermination rate is p0=92%. Some researchers claim that theproportion of germination should be higher than that.(a) (2 points) Based on the...
- Q 1) The number of times that student takes an A class, X(X has aline under) has the discrete uniform pmf: p(x) = 0.25 for x =1,2,3,4. Recall from earlier course...
- Q Nine homes are chosen at random from real estate listings in twosuburban neighborhoods, and the square footage of each home isnoted in the following table.Size of Homes in Two SubdivisionsSubdivisionSquare...
- Q 5. Flu Vaccine: The Center for Disease Control (CDC) claims thatthe flu vaccine is effective in reducing the probability of gettingthe flu. They conduct a trial on 2000 people. The...
- Q In the year 2000, the average car had a fuel economy of 24.6MPG. You are curious as to whether the average in the present dayis greater than the historical value....
- Q A new process will be testing for electroplating nickel. Thecurrent process is tested on thirty slugs, and the mean thicknessof the nickel is 0.0020 m with a sample standard deviation...
- Q Chauncey Billups, a current shooting guard for the Los AngelesClippers, has a career free-throw percentage of 75.3%. Suppose heshoots seven free throws in tonight's game. What is the standarddeviation of...
- Q Don't use the p value method instead use the \"5 steps ofhypothesis testing.\" Or I will get all of these wrong and I reallyneed the help!!9) An agent claims there...
- Q For this assignment, you are taking on the role of a manager ofa hospital-based orthopaedic surgery clinic who has decided todiscontinue providing publicly funded physiotherapy serviceson-site. Effective immediately any patient...
- Q Many teens have posted profiles on a social-networking website.A sample survey in 2007 asked a random sample of teens with onlineprofiles if they included false information in their profiles. Of170...
- Q Suppose we are interested in theproportion of nursing majors at a university, and we take a randomsample of 150 students to estimate the percent of students in ourclass who are...
- Q 3. Suppose the makers of M&M candies give the followingaverage percentages for the mix of colors in their bags of plainchocolate M&M's. Stated Distribution of Colors Brown Yellow RedOrange Green...
- Q 1. (15 pts) Myocardial blood flow (MBF) was measured for twogroups of subjects after five minutes of bicycle exercise. Thenormoxia (“normal oxygenâ€) group was provided normal air to breathewhereas the...
- Q For the following situations, indicatethe statistical test you would conduct and WHY (that is, explainthe variables)!choose between paired sample t test, one way anova test,2 sample t test.A researcher is...
- Q When producing a special bulletproof glass, dots(defects) may occur in the glass. The average number of dots persquare centimeter is 0.2 The number of dots per unit area ispoisson distributed.please...
- Q Salt-free diets are often prescribed to people with high bloodpressure. The following data values were obtained from anexperiment designed to estimate the reduction in diastolic bloodpres- sure as a result...
- Q Estimating a Mean: Consider the frequencydistribution for 22 test scores (it was a difficult exam).Score  Frequency  60 −64865 −69470 −74275 −79480 −844(a) The class midpoint for the first class is  .(b) The class...
- Q In a certain region, 24% of people over age 50 didn't graduatefrom high school. We would like to know if this percentage is thesame among the 25-30 year age group....
- Q A biologist examines 17 seawater samples for magnesiumconcentration. The mean magnesium concentration for the sample datais 0.252 cc/cubic meter with a standard deviation of 0.074.Determine the 80% confidence interval for...
- Q Please use the p-value approach to conduct ahypothesis test for the following problem. Please provide detailedsolutions in the four steps to hypothesistesting.The security department of a factory wants to know...
- Q Suppose the local Best Buy store averages 301 customers everyday entering the facility with a standard deviation of 80customers. A random sample of 50 business days was selected. Whatis the...
- Q These days, delivery and carry out are pretty much the onlyoptions for our favorite restaurant food. In a random sample of 80orders from Bob’s Burgers, 46 of them were for...
- Q A bag contains four quarters, one nickel, one dime, and fivepennies. We reach with our hand and pull out two coins at random.What are the chances that we pull $0.15...
- Q Can taking chess lessons and playing chess improve memory? Theonline article “The USA Junior Chess Olympics Research: DevelopingMemory and Verbal Reasoning†(New Horizons for Learning, April2001) described a study in...
- Q What are some approaches to assigning probability? Which couldbe labeled as difficult to understand? Why?
- Q In a study of habits of undergraduate students, a researchersampled 53 students and found that the mean number of classesmissed over the course of a school year was 18. Assume...
- Q Why is Cohen's d an important statistic to compute for ahypothesis test?
- Q A popular professor wants to construct a 90% confidenceinterval with a margin of error = 0.03 on the proportion ofstudents that make a thorough “cheat sheet†for her statisticstests.(4 points)...
- Q In a random sample of 115 trombone players, 13 were female.Construct a 99% confidence interval for the proportion of tromboneplayers that are female.
- Q The amount of annual snowfall in a certain mountain range isnormally distributed with a mean of 70 inches and a standarddeviation of 10 inches. If represents the average amount ofsnowfall...
- Q The SAT scores for students are normally distributed with a meanof 1000 and a standard deviation of 200. What is the probabilitythat a sample of 36 students will have an...
- Q Question 2A study of the impact of graphical quality andage on time spent playing a computer game.Researchers record the time, in minutes, that children spentplaying three computer games: one with...
- Q Required information[The following information applies to the questionsdisplayed below.]A recent national survey found that high school students watchedan average (mean) of 6.7 DVDs per month with a population standarddeviation of...
- Q 5. Suppose that researchers study a sample of 50 people and ndthat 10 are left-handed.(a) Find a 95% confidence interval for the population proportionthat is left-handed.(b) What would the confidence...
- Q A university interested in tracking its honors program believesthat the proportion of graduates with a GPA of 3.00 or below isless than 0.20. In a sample of 200 graduates, 30...
- Q Use R to solve the following problem: A study was carried out toinvestigate the variation of rainbow trout weights in a certaincreek. The weights (in kilograms) of 10 randomly selected...
- Q A sample of 4 different calculators is randomly selected from agroup containing 18 that are defective and 33 that have no defects.What is the probability that at least one of...
- Q (1) Consider the random experiment where three 6-sided dice arerolled and the number that comes up (1, 2, 3, 4, 5 or 6) on eachdie is observed.(a) What is the...
- Q Assume that systolic blood pressure (SBP) in apopulation is normally distributed with a mean of 120 mmHg and astandard deviation of 10 mmHg- What percent of the population has an...
- Q 10. State which is the most appropriate:z or t or neither. Give the criticalvalue when you can.           95% confidence; ; ; population has an outlier11. We want to know if the...
- Q 5.35 Gaming and distracted eating, Part I: Agroup of researchers are interested in the possible effects ofdistracting stimuli during eating, such as an increase or decreasein the amount of food...
- Q 2. In a random sample of 857 families withmultiple children, it was found that 533 of them prefer Charminbrand toilet paper. Test the claim that the proportion is largerthan 0.61...
- Q Based on past data, the sample mean of the credit card purchasesat a large department store is $45. Assuming sample size is 25 andthe sample standard deviation is 9.a) Â Â Â Â Â Â Â Â ...
- Q Chapter P, Section 1, Exercise 037During the 2015-16 NBA season, Jodie Meeks of the Detroit Pistonshad a free throw shooting percentage of 0.906 . Assume that theprobability Jodie Meeks makes...
- Q In addtion to the questions, make sure to display the regionsunder the normal distribution curve.The monthly income of residents of Big City is normallydistributed with a mean of $3000 and...
- Q Suppose an audit process is taking place at a small airport, andthe headauditor arrives randomly throughout the day and assesses theoperation of the airport.She shows up in one-hr intervals at...
- Q Based on an online survey done recently, the company asked avariety of questions regarding internet and email practices of arandomly selected sample size of 750 people aged 18 to 25...
- Q What are some of the similarities between ExpectationMaximization and K-mean aside form both being clusteringmethods.
- Q Consider two samples: one which has 3 observations with a meanof 8.3 and a standard deviation of 1.2, and another which has 10observations with a mean of 3.0 and a...
- Q For spring 2013 senatorial election in Colorado betweenDemocratic incumbent Allison Boxer and Republican challenger CarlyFiorina, the CNN exit poll of 3870 voters indicated that 2180(56.3%) of those voters voted for...
- Q Research Question:Â Â What is the effect of gender onwhether or not a student has a meal plan?Using the variables Q7.1 (What is your gender?) and Q6.1 (Do youhave a meal plan?)...
- Q You are to play three games. In the first game, you draw a card,and you win if the card is a heart. In the second game, you tosstwo coins, and...
- Q Chapter 4, Section 3, Exercise 116 Lizards and Invasive FireAnts This exercise addresses lizard behavior in response to fireants. The red imported fire ant, Solenopsis invicta, is native toSouth America,...
- Q Explain why, if “A†stands for “There is thunder†and “Bâ€stands for “It is raining,†you would expect p(A|B) to be greaterthan P(A).Suppose you have a fair coin which is...
- Q In an experiment, college students were given eitherfour quarters or a $1 bill and they could either keep the money orspend it on gum. The results are summarized in the...
- Q Dorothy Kelly sells life insurance for the Prudence InsuranceCompany. She sells insurance by making visits to her clients homes.Dorothy believes that the number of sales should depend, to somedegree, on...
- Q One article describes a study of 81 randomly selected youngadults with pierced tongues. The researchers found receding gums,which can lead to tooth loss, in 25 of the participants.(a) Construct a...
- Q (Please answer step-by-step. Typedwork preferable.)1. The following matrix displaysthe bivariate correlations between family size (X), weekly grocerybill (Y), and income (Z) for a random sample of 50 families.XYZX1.000.600.20Y0.601.000.30Z0.200.301.00a. First, list...
- Q Use the information to answer Q7-10 Clemson found that 6%students said that they were strongly opposed to increases incollege tuition. Suppose we have a random sample of 200 students.Let ?Ì‚be...
- Q According to a labor union contract, the mean income forall senior-level assembly-line workers in a large company must be$520 per week. Women who work for the company think that menworkers...
- Q Study Aim to determine the effect of four different types oftips in a hardness tester on the observed hardness of a metalalloy. Four Specimen of the alloy were obtained, and...
- Q Suppose you gather data from 450 residents in Pullman,Washington about the number of crimes they think happen on amonthly basis in their neighborhood. The answers range from 0 (nocrimes) to...
- Q 7. Suppose that a particular brand of peanut butter is in factfavored by 47% of all moms. A consumer organization will take arandom sample of 200 moms from across the...
- Q Match each scenario with the SINGLE MOSTappropriate test. Each answer choice may be used once, more thanonce, or not at all. Assume all data collection is by randomsampling unless the...
- Q a. I want to know if the percentage of traffic accidents changesby day for a given week in Ephraim. What type of test would Ido?Group of answer choicesANOVAChi squared GOF...
- Q Is it possible to figure out, WITHOUT THE USE OF GRAPH, if thesample of a data comes from Normal Distribution? If it is possiblethat by doing some kind of mathematical...
- Q BE CLEAR AND NEAT, DON\"T USE OTHER PEOPLE's Solutions for an UPVOTE!A company that manufactures pavers used in residentiallandscaping. The company guarantees that the paver average weightis no more than...
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