Statistics question and answers for August 25, 2023
- Q Bob is a recent law school graduate who intends to take thestate bar exam. According to the National Conference on BarExaminers, about 55% of all people who take the state...
- Q Time​ (days)ImmediateTime​ (days)ImmediateActivityamb​Predecessor(s)Activityamb​Predecessor(s)A555577long dash—H444466​E, FB112255long dash—I22771010​G, HC555555AJ224477ID44881313AK6610101313IE1110101717​B, CL226666JF115577DM222233KG226699DN77771212​L, Mb) If the time to complete the activities on the critical pathis normally​ distributed, then the probability that the criticalpath will be...
- Q 1.You go to a casino with $31 and the following strategy: In thefirst round you bet $1, if you win, you receive double your bet,you leave. If you lose you...
- Q Usea probability tree to find the probabilities of the indicatedoutcomes.Three balls are drawn, without replacement, from a bagcontaining 7 red balls and 6 white balls. (Enter your probabilitiesas fractions.)(a) Find...
- Q 4. In order to test whether brand-name printer cartridges producemore printed pages, on average, than generic cartridges, a researchfirm has 6 randomly selected printer users use both types ofcartridges and...
- Q A telephone sales solicitor, trying to decide between twoalternative sales pitches, randomly alternated between them duringa day of calls. Using approach A, 20% of 100 calls led to requestsfor the...
- Q When and how do you use a chi-square distribution to test if twovariables are independent? What is an example of how to use thecontingency table to find expected frequencies?
- Q Simple linear regression, like ARIMA, involves statisticalmodeling. Unlike decomposition, averaging and smoothing methods,fitting a simple linear regression model to data involvesstatistical inference.Moreover, several assumptions/conditions need to be satisfied inorder to...
- Q According to the Consumer Electronics Manufacturers Association,10% of all U.S households have a fax machine and 52% have apersonal computer. Suppose 91% of all U.S households having a faxmachine also...
- Q The National Assessment of Educational Progress (NAEP) includesa mathematics test for eighth‑grade students. Scores on the testrange from 0 to 500 . Demonstrating the ability to use the mean tosolve...
- Q After reviewing data from a sample, an inference can be madeabout the population. For example,Find a data set on the internet. Some suggested search terms:Free Data Sets, Medical Data Sets,...
- Q Develop an APA formatted paper that defines and presents ananalysis of the following concepts in a business application. Thismeans that you must provide examples of how each of these conceptscan...
- Q Suppose three players go on multiple rounds of kart race. Ineach round, every player has a winning probability of 1/3,independent of other rounds. Let N denote the number of roundsuntil...
- Q 1. What trends do you notice in your data set?2.Based on the trends and the history of your data set, make aclaim. What kind of test (left, right, two tailed)...
- Q Does Early Language Reduce Tantrums? A recent headline reads“Early Language Skills Reduce Preschool Tantrums, Study Finds,†andthe article offers a potential explanation for this: “Verbalizingtheir frustrations may help little ones...
- Q A machine produces metal rods used in automobile suspensionsystem. A random sample of 16 rods is selected, and the diametermeasured. The resulting data in millimeters are shown here: 8.238.58 8.42...
- Q Poisson1. Passengers of the areas lines arrive at random andindependently to the documentation section at the airport, theaverage frequency of arrivals is 1.0 passenger per minute.to. What is the probability...
- Q A brewery needs to purchase glass bottles that canwithstand an internal pressure of at least 150 pounds per squareinch (psi). A prospective bottle vendor claims its productionprocess yields bottles with...
- Q A certain flight arrives on time 88 percent of the time. Suppose145 flights are randomly selected. Use the normal approximation tothe binomial to approximate the probability that​(a) exactly 128 flights...
- Q TWO MEANS – INDEPENDENT SAMPLESChoose a variable from the advising.sav data set to comparegroup means. While the choice of which variable to test is up toyou, you must remember that...
- Q A survey found that​ women's heights are normally distributedwith mean63.8in and standard deviation2.4in. A branch of the military requires​ women's heights to bebetween 58 in and 80 in.a. Find the...
- Q A researcher wishes to estimate the proportion of adults whohave​ high-speed Internet access. What size sample should beobtained if she wishes the estimate to be within 0.04 with95% confidence if(a)...
- Q In an effort to reduce energy costs, a major university hasinstalled more efficient lights as well as automatic sensors thatturn the lights off when no movement is present in a...
- Q The tread life (x)  of tires follow  normaldistribution with µ =  60,000 and σ= 6000miles.  The manufacturer guarantees the tread life forthe first 52,000 miles. (i) What proportion of tireslast  at least 55,000 miles? (ii)  Whatproportion...
- Q You bet your friend you can make 3 free throws. If you do it youget 10 dollars, if you don’t you lose 10 dollars. The probabilitythat you make any given...
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