Basic Math question and answers for October 04, 2023
- Q Alana consulted a local master beekeeper, Dr. Beekeeper,concerning the death of some of her beehives. He suggested adding aspecific type of plant food, “Bee Empower” to the clover fieldswhere the...
- Q The accompanying data set provides the closing prices for fourstocks and the stock exchange over 12 days:DateABCDStock Exchange9/3/10127.3718.3421.0315.5110432.459/7/10127.1518.1820.4415.5110334.679/8/10124.9217.8820.5715.8210468.419/9/10127.3517.9520.5216.0210498.619/10/10128.3717.8220.4215.9810563.849/13/10128.3618.6421.1616.2110616.079/14/10128.6118.8321.2916.2210565.839/15/10130.1718.7921.6916.2510627.979/16/10130.3419.1621.7616.3610595.399/17/10129.3718.8221.6916.2610517.999/20/10130.9719.1221.7516.4110661.119/21/10131.1619.0221.5516.5710687.95With the help of the Excel Exponential Smoothing tool, I wasable to forecast...
- Q The 4M company has a work center with a single turret lathe.Jobs arrive at this work center according to a Poisson process at amean rate of 2 jobs per day,...
- Q When one uses an ANOVA, explain the difference between “maineffects” and “interaction effects”. Give examples of each.
- Q assume that when adults with smartphones are randomly selected, 49%use them in meetings or classes. if 9 adult smartphone users arerandomly slected, find the probability that at least 5 of...
- Q A copier cost $200 for each repair call, after 3 callsthey are free (For example 1 call= $200, 3 or more calls = $600).The following chart shows the probability of...
- Q Statistics:Construct a stem and leaf diagram, a frequencydistribution table, plus develop a bar chart, pie chart, histogram,polygon and an ogive from the following data set.When you construct the pie charts,...
- Q Directions: Answer the followingquestions. Round probabilities to four digits after the decimal.For full credit, you will need to show your work justifying how youdetermined numerical values. You may consider adding...
- Q Suppose you choose a coin at random from an urn with 3 coins,where coin i has P(H) = i/4. What is the pmf for your priordistribution of the probability of...
- Q An automobile license plate consists of 3 letters followed by 4digits. How many different plates can be made:a. If repetitions are allowed?b. If repetitions are not allowed in the letters...
- Q You Explain it:What is a residual?What does it mean when a residual is positive?Explain the phrase outside the scope of themodel.Why is it dangerous to make predictions outside the scope...
- Q Test the claim that the proportion of men who own cats issignificantly different than the proportion of women who own catsat the 0.2 significance level. The null and alternative hypothesiswould...
- Q We are given 3 urns as follows: Urn A contains 3 red and 5 whitemarbles, Urn B contains 2 red and one white marble, Urn C contains2 red and 3...
- Q 2. Problem 2 is adapted from the Problem 39 at the end ofChapter 11. Please solve this problem in Excel and submit yourExcel spreadsheet. The problem is as follows: The...
- Q in a clinical trial, 25 out of 852 patients taking aprescription drug daily complained of flulike symptoms. Supposethat is it known that 2.5% of patients taking competing drugscomplain of flulike...
- Q There are 3 coins which when flipped come up heads,respectively, with probabilities 1/4, 1/2, 3/4. One of these coinsis randomly chosen and continually flipped.(a) Find the expected number of flips...
- Q You are a professor of statistics and have been asked to teach acourse in social science statistics off-campus to a class of gradstudents enrolled in the Continuing Education Program of...
- Q Consider the following information about travelers on vacation:40% check work email, 30% use a cell phone to stay connected towork, 25% bring a laptop with them, 21% both check work...
- Q You are evaluating the capability of a process. Standarddeviation (s) is 5. Customers have said that they will accept unitsranging between 35 and 60. The location of the mean is...
- Q Use the data from question 1. Conduct a hypothesis test at ? =.01 to determine if the population variance is greater than904.75.Question 1: 1. Consider the following sampled data: s...
- Q Discuss the following three questions:What Big Data trends in the field of personal health are moreexciting to you? why?What new Big Data trends in the field of sports do you...
- Q When doing an experiment, the experimenter wants increase thechances that subjects' characteristics, that could bias the resultsof the experiment, and reduce the validity of the findings, areequally distributed across the...
- Q (Answers are given but can you please work through the problemand show the steps)Chapter 10 p2Allied Corporation is trying to determine whether to purchaseMachine A or B. It has leased...
- Q Assume that adults have IQ scores that are normally distributedwith a mean of mu equals 100 and a standard deviation sigma equals15. Find the probability that a randomly selected adult...
- Q 1. Assume that a sample is used to estimate a populationproportion p. Find the 99.9% confidence interval for asample of size 159 with 40% successes. Enter your answer as anopen-interval...
- Q An economist with the Liquor, Hospitality and MiscellaneousWorkers' Union collected data on the weekly salaries of workers inthe hospitality industry in Cairns and Townsville. The unionbelieved that the weekly salaries...
- Q Install the `babynames` package with `install.packages()`. Thispackage includes data from the Social Security Administration aboutAmerican baby names over a wide range of years. Generate a plot ofthe reported proportion of...
- Q W represent the wingspan of an airplane and V represents thevelocity which are 2 random variables.W has a normal distribution with mean 10 and standard deviation4.Also V = 0.5.W +...
- Q The question in the textbook says:"One study mentioned in an article that 90% of the studentsscored above the national average on standardized tests. Using yourknowledge on mean, median and mode,...
- Q Historical data indicated that the time required to service theconveyor belt at Coca-Cola Amatil's Richlands operations can bemodelled as a normal distribution with a standard deviation of 20minutes. A random...
- Q A repairman has 20 jobs that need to be completed today.Usually, 70% of all jobs are fairly straightforward, so that thetime it takes to complete them is well-described by normaldistribution...
- Q A study examined parental influence on the decisions ofteenagers from a certain large region to smoke. A randomly selectedgroup of? students, from the? region, who had never smoked werequestioned about...
- Q Do bonds reduce the overall risk of an investment portfolio? Letx be a random variable representing annual percent return forVanguard Total Stock Index (all stocks). Let y be a random...
- Q ScenarioOffice Equipment, Inc. (OEI) leases automatic mailing machinesto business customers in Fort Wayne, Indiana. The company built itssuccess on a reputation of providing timely maintenance and repairservice. Each OEI service...
- Q "Radon: The Problem No One Wants to Face" is the title of anarticle appearing in Consumer Reports. Radon is a gasemitted from the ground that can collect in houses and...
- Q Suppose there is a normally distributed population which has amean of ? = 440and a standard deviation of ? = 60. (15p)1.What portion of a normal distribution is below 295?2....
- Q An urn contains 10 red and 12 blue balls. They are withdrawn oneat a time without replacement until a total of 4 red balls havebeen withdrawn. Find the probability that...
- Q A researcher compares the effectiveness of two differentinstructional methods for teaching electronics. A sample of 138students using Method 1 produces a testing average of 61 . A sampleof 156 students...
- Q In models for the lifetimes of mechanical components, onesometimes uses random variables with distribution functions fromthe so-called Weibull family. Here is an example: F(x) = 0 for x< 0, and...
- Q A political poll immediately prior to a local election revealed thefollowing result.?Female VotersMale votersVote Democrat12001150Vote Republican2100950Total n1 = 3300n2 = 2100Use ? = .05. Test to determine whether the proportions...
- Q The output voltage of a power supply unit has an unknowndistribution. Using a sample size of 36, sixteen samples are takenwith the following sample-mean values: 10.35 V, 9.30 V, 10.00...
- Q An eating disorders clinic would like to assess the efficacy oftheir 10-week mindfulness training program with clients who haveBinge Eating Disorder (BED). The clinic researchers first measuredthe number of binges...
- Q What are two examples for normal distributions with numbers andformula?
- Q The data provided give the gasoline mileage? (in miles per?gallon) based on the horsepower of a? car's engine and the weightof the car? (in pounds). Using the data? provided, determine...
- Q Suppose as part of a national study of economic competitivenessa marketing research firm randomly sampled 200 adults between theages of 27 and 35 living in metropolitan Seattle and 180 adultsbetween...
- Q In a small town, there are 5 high school districts. Eachdistrict includes 100 high schoolstudents. In total, there are 500 high school students in thetown including 240 malestudents and 260...
- Q The diameter of a brand of tennis balls is approximatelynormally? distributed, with a mean of 2.58 inches and a standarddeviation of 0.03 inch. A random sample of 11 tennis balls...
- Q 5. A researcher tested a group of 11 participants with regardsto their short term memory on a test of a random string of digits.The collected data was as follows 7,...
- Q Four important measurements were taken in harsh environmentalconditions. Two of the four measurements were lost in the harshconditions and the remaining two are5 3However a scientist recalls the mean and...
- Q for this problem. At least four digits after thedecimal in your calculations answers May Vary slightly due torounding a random sample of 5100 permanent dwellings on an entirereservation show that...
- Q In the past, 30% of a country club's members brought guests toplay golf sometime during the year. Last year, the club initiated anew program designed to encourage members to bring...
- Q 1. Calculate the weighted unit cost per square foot for theproject data shown below, and determine the cost of a 30,000-sfproject.2. Determine the relationship between unit cost and size for...
- Q Should the following pairs of events be modeled as independentor dependent? Explain your reasoning.(a) We choose a voter at random (all voters equally likely) fromMinneapolis. Let A be the event...
- Q 1- critical value approach of hypothesis testing. Give anexample.
- Q You flip a coin, if it is heads you will have a good day and ifit is tails you will have a bad day. There are 30 days intotal.(a) What...
- Q Continuous data sets can be analyzed for measures of centraltendency, dispersion, and quartiles. Discuss the importance ofreviewing these measures and identify the full story that thesemeasures reveal about the data...
- Q Use the sample data and confidence level given below to completeparts? (a) through? (d).A research institute poll asked respondents if they feltvulnerable to identity theft. In the? poll, n =928...
- Q Consider the following time series data:Month 1 2 3 4 5 6 7Value 23 15 20 12 18 22 15(b)Develop a three-month moving average for this time series.Compute MSE and...
- Q Here is the dataset containing plant growth measurements ofplants grown in solutions of commonly-found chemicals in roadwayrunoff. Researchers wish to determine roadway runoff with differentcompositions has a different effect on...
- Q Let P(A) = 0.40, P(B) = 0.20, P(C) = 0.50, P(D) = 0.30, P(A ? B)= 0.15, P(A | C) = 0.60, P(B | C) = 0.20, P(B ? D)...
- Q Complete all of the steps to derive the normal equations forsimple linear regression and then solve them.
- Q A study of the amount of time it takes a mechanic to rebuild thetransmission for a 1992 Chevrolet Cavalier shows that the mean is8.4 hours and the standard deviation is...
- Q A recent headline announced / impeachment causes a dip in aPresident’s Approval Rating.This conclusion was based on a University poll of 100 adults. Inthe poll, 41.1% of respondents approved of...
- Q PLEASE DON’T COPY PASTE FEOM PREVIOUS QUESTION1)On Planet Geometry, whenever two right angles have childrenthey can have rectangles or squares with equal probability each.Consider a (very nice) pair of right...
- Q A. How well do people remember their past diet? Data areavailable for 91 people who were asked about their diet when theywere 18 years old. Researchers asked them at about...
- Q USA Today reported that approximately 25% of all state prisoninmates released on parole become repeat offenders while on parole.Suppose the parole board is examining five prisoners up for parole.Let x...
- Q 5. Describe what we know about the theoretical distribution ofsample means. Be sure toinclude answers to the questions that follow:?What is a distribution of sample means? How is this differentfrom...
- Q 7.20 Body measurements, Part III. Exercise 7.13 introduces dataon shoulder girth and height of a group of individuals. The meanshoulder girth is 107.30 cm with a standard deviation of 10.34...
- Q A study was done to explore the number of chocolate barsconsumed by 16-year-old girls in a month's time. The results areshown below. Number of Chocolate Bars Consumed 56 46 12...
- Q Roll two ordinary dice and let X be their sum. Draw the pmf andcmf for X. Compute the mean and standard deviation of X. Solveusing R studio coding.
- Q Your friend texted you a question. You did some research andfound that a Minifig is a package containing one figurine. You alsofound out that, for every 60 packs produced, 4...
- Q 1. Assume that a sample is used to estimate a populationproportion p. Find the 90% confidence interval for asample of size 112 with 28% successes. Enter your answer as atri-linear...
- Q An investor holding a certain portfolio consisting of two stocksinvests 20% in Stock A and 80% in Stock B. The expected return fromStock A is 4% and that from Stock...
- Q From public records, individuals were identified as having beencharged with drunken driving not less than 6 months or more than 12months from the starting date of the study. Two random...
- Q A type of new car is offered for sale with 4 option packages. Acustomer can buy any number of? these, from none to all 4. Amanager proposes the null hypothesis...
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