Basic Math question and answers for September 11, 2023
- Q Why is Levene’s test a useful test for factorial ANOVA?It looks to see if there are anysignificant differences within group variables.It looks to see if there are anysignificant differences within...
- Q Question 2Frasers Logistics operates a large fleet of trucks thattransport goods on behalf of their clients. The trucks undergoregular scheduled maintenance as well as unscheduled maintenancewhen a problem occurs. Data...
- Q The expected number of births at a rural hospital is one perday. Assume that births occur independently and at a constantrate.Use R to the draw the pmf of the number...
- Q Test the hypothesis using the? P-value approach. Be sure toverify the requirements of the test.Upper H 0 : p equals 0.58 versus Upper H 1 : p less than 0.58H0:p=0.58...
- Q One of the items that businesses would like to be able to testis whether or not a change they make to their procedures iseffective. Remember that when you create a...
- Q Use Excel to Answer.A random sample of six cars from aparticular model year had the fuel consumption figures, measure inmiles per gallon, shown below.Using T.INV, find a 90% confidence interval...
- Q Suppose that you want to improve the process of loadingpassengers onto an airplane. Would a discrete event simulationmodel of this process be useful? What data would have to becollected to...
- Q 6 a) You and your friend are in a class with 12 students. For aproject, the class is randomly divided into two equal groups.“Randomly” means all divisions are equally likely....
- Q The following xbar and s charts based on n=4 have shownstatistical control: Xba Chart: UCL=710, CL=700, LCL=690, s chart-UCL=18.08, CL=7.979, LCL=0,A)Estimate the process parameters mean and sigma (standarddeviation).B)If the specifications...
- Q A procurement specialist has purchased 25 resistors from Vendor1 and 35 resistors from Vendor 2. Each resistor’s resistance wasmeasured and reported in Problem 4 spreadsheet of Homework 2.xlsx.You want to...
- Q Acompanysellinglicensesofnewe-commercesoftwareadvertisedthatfirmsusingthissoftwarecould obtain, on average during the first year, a minimum yield (incost savings) of 20 percent on average on their softwareinvestment. To disprove the claim, we checked with 10 differentfirms...
- Q 3.2Kevlar epoxy is a material used on the NASA space shuttles.Strands of this epoxy were tested at the 90% breaking strength. Thefollowing data represent time to failure (in hours) for...
- Q A local bank has two branches, one in Standish and the other inLimerick. To determine whether the wait time at the drive-throughwas different for the branches, the director of the...
- Q Suppose a point is to be selected at random from the unitcircle. Write the sample space associated with this randomexperiment.
- Q Determine statistically which two bands are the mostcorrelated? Explain how did you get your answer and includeintermediate calculations.10597858282811081049382818110610910288818110610810389848110510610495898310410298949086Green12811595898990129124109948989128133125102938912913412410195901301281261121049212812511810810496Red1029791919192104101969290901031061009290891021061019392891021031029795901019998999894NIR
- Q 1. A is called a palindrome if it reads the same from left andright. For instance, 13631 is apalindrome, while 435734 is not. A 6-digit number n is randomlychosen. Find...
- Q Question 3 [25]OK furniture store submit weekly records the number of customercontacts contacted per week. A sample of 50 weekly reports showed asample mean of 25 customer contacts per week....
- Q Based on annual driving of 15,000 miles and fuel efficiency of20 mpg, a car in the United States uses, on average, 700 gallons ofgasoline per year. If annual automobile fuel...
- Q For given list of members in a universal set U.Members A B1 a1 b12 a2 b13 a3 b24 a1 b25 a1 b26 a2 b17 a3 b18 a1 b29 a1 b210...
- Q Upon reviewing recent use of conference rooms at an engineeringconsulting firm, an industrial engineer determined the followingprobability distribution for the number of requests for aconference room per half-day: X 0...
- Q In games of the KENO or LOTTO style, the bettorselects numbers from a fixed set. Then the game operator selectsanother set of numbers, and the bettor wins according to the...
- Q Regression model: Population=f(GDP,GNI,PPI,policy)How to collect data for dummy variable( policy )and determineits influence on population?
- Q There are two machines available for cutting corksintendedfor use in wine bottles. The first produces corks withdiametersthat are normally distributed with mean 3 cm andstandarddeviation .1 cm. The second machine...
- Q 1.For safety reasons, 3 different alarm systems were installed inthe vault containing the safety deposit boxes at a Beverly Hillsbank. Each of the 3 systems detects theft with a probability...
- Q The average playing time of compact discs in a large collectionis 35 minutes, and the standard deviation is 3 minutes.(a) What value is 1 standard deviation above the mean? 1standard...
- Q When evaluating a chi-square test, describe the importance ofthe goodness of fit test. Provide an example and explain how thetest is used to evaluate the data.
- Q The following tablepresents the average price in dollars for a dozen eggs and a gallonof milk for each month in a recent year.DozenEggsGallon ofMilk1.943.581.803.521.773.501.833.471.693.431.673.401,653.431.883.471.893.471.963.521.963.542.013.58If a linear regressionmodel were fit, what...
- Q . Assume that the lifetimes (measured from the beginning of use)of lightbulbs are i.i.d. random variables with distribution P(T ?k) = (k + 1)?? , k = 0, 1, 2,...
- Q 1) For the following data on Year-end Audit times (in days), 17,20, 25, 27, 19, 19, 20, 32, 26, 23, 24, 23, 27, 38, 21, 23, 22, 28,33, 18, 27,...
- Q Market research has indicated that customers are likely tobypass Roma tomatoes that weigh less than 70 grams. A producecompany produces Roma tomatoes that average 78.0 grams with astandard deviation of...
- Q A restaurant manager is interested in taking a more statisticalapproach to predicting customer load. She begins the process bygathering data. One of the restaurant hosts or hostesses isassigned to count...
- Q Applications that do not violate the OLS assumptions forinference. Identify the response and explanatoryvariable(s) for each problem. Write the OLS assumptions forinference in the context of each study.Cricket Chirps. Researchers...
- Q In a store, 40% of customers make a single purchase. Thisactivity requires a time that has an exponential distribution withmean 2.0 minutes. The other 60% of customers ask for informationbefore...
- Q Section 4.4 Contingency Tables &AssociationsYou Explain it:What is meant by marginal distribution?What is meant by a conditional distribution?Explain why we use the term associationrather thancorrelationwhen describing the relation between twovariables...
- Q Two different simple random samples are drawn from two differentpopulations. The first sample consists of 30 people with 14 havinga common attribute. The second sample consists of 1900 people with1370...
- Q What are the mean, median, and mode of a set of data, and how dothey differ from each other? What are the different type measuresof dispersion? Provide examples of each...
- Q An experiment on memory was performed, in which 16 subjects wererandomly assigned to one of two groups, called "Sentences" or"Intentional". Each subject was given a list of 50 words. Subjectsin...
- Q You wish to test the following claim ( H a ) at a significancelevel of ? = 0.005 . H o : p = 0.71 H a : p ?...
- Q Suppose a mutual fund qualifies as having moderate risk if thestandard deviation of its monthly rate of return is less than 66?%.A? mutual-fund rating agency randomly selects 27 months anddetermines...
- Q You are the program officer for an outreach program forstruggling families. Because of very limited funding (welcome tothe non profit sector), you are only able to start the program upin...
- Q George Johnson recently inherited a large sum of money; he wantsto use a portion of this money to set up a trust fund for his twochildren. The trust fund has...
- Q Costco sells paperback books in their retail stores and wantedto examine the relationship between price and demand. The price ofa particular novel was adjusted each week and the weekly sales...
- Q In a study of speed? dating, male subjects were asked to ratethe attractiveness of their female? dates, and a sample of theresults is listed below ?(1equalsnot ?attractive; 10equalsextremely?attractive). Construct a...
- Q Show all five steps: The harmful effects ofsmoking tobacco have been illustrated in medical studies yet manyindividuals still choose to smoke. The Centers for Disease Controlestimate that approximately 13% of...
- Q Doctors use several kinds of medications to treat the symptomsand complications of COPD; some are taken on a regular basis andothers as needed:Bronchodilators. These medications — which usually come in...
- Q What is the best way to show and identify the Ho and H1 ofmental illness with explaining what “significance” is in a generalsense and in the chosen article. discuss the...
- Q 1. A prison administrator is interested in examining therelationships between the type of prison security (maximum, medium,and minimum) and the number of previous offenses committed by aninmate. He believes that...
- Q Scenario: Imagine thata psychologist working with veterans with post-traumatic stressdisorder wants to compare the effectiveness of several therapiesfocused on reducing symptoms of anxiety. The psychologist randomlysampled 20 veterans who recently...
- Q A researcher did a study looking at the effectiveness ofdifferent approaches to washing leafy green produce, with the goalof reducing risk for Escherichia coli (e coli) exposure inconsumers. Farms were...
- Q Consider the following set of ordered pairs. x 4 2 4 3 6 4 y 5 7 74 2 7 ?a) Calculate the correlation coefficient. ?b) Using alphaequals 0.05?, perform...
- Q A company has developed a forecast using the Delphi method forJanuary through June1. Using the data provided, what is the Mean Absolute Deviationfor the forecast method?2. Using the data provided,...
- Q A fast food company uses two management-training methods. Method1 is a traditional method of training and Method 2 is a new andinnovative method. The company has just hired 40 new...
- Q Kroger is in the process of designing a new store to be locatedin a plaza under development in Mason. They intend to use theirSymmes Township store as a model, but...
- Q 15. A Pew Poll in 2010, found that 50% of adults aged 25-29 hadaccess to only a cell phone, while 40% had access to both acellphone and landline and 10%...
- Q A? government-sponsored organization that was established in 1938after the Depression to provide local banks with money from thefederal government to be used for residential mortgages in aneffort to increase homeownership...
- Q Let x = age in years of a rural Quebec woman at thetime of her first marriage. In the year 1941, the populationvariance of x was approximately ?2 =5.1. Suppose...
- Q . A quality survey asked recent customers of their experience ata local department store. One question asked for the customersrating on their service using categorical responses of average,outstanding, and exceptional....
- Q The age distribution of the Canadian population and the agedistribution of a random sample of 455 residents in the Indiancommunity of a village are shown below.Age (years)Percent of Canadian PopulationObserved...
- Q A coin will be tossed 5 times.The chance of getting exactly 2 heads among 5 tosses is %.The chance of getting exactly 4 heads among 5 tosses is %.A coin...
- Q 5). Finally, which of the following would you use to write outthe results in an APA formatted results section? Note that this oneis tricky – some answer options differ in...
- Q The U.S. Department of Transportation, National Highway TrafficSafety Administration, reported that 77% of all fatally injuredautomobile drivers were intoxicated. A random sample of 51 recordsof automobile driver fatalities in Kit...
- Q 9) (CH. 9-2) Isthere a difference between the average NBA Championship Final gamewinning scores of the 1970’s versus the average of the winningscores of the 2000’s? Use a 0.01 significance...
- Q How is variation within categories and between categoriesrelevant to ANOVA? What is dfw? dfb?In ANOVA, if the null is false, the means of the sample shouldbe very (different? Similar? zero?)...
- Q A pair of dice are rolled? 1,000 times with the followingfrequencies of? outcomes:Sum23456789101112Frequency10 30 50 70 110 150 170 140120 8070 Use these frequencies to calculate the approximate empiricalprobabilities and odds...
- Q You test a new drug to reduce blood pressure. A group of 15patients with high blood pressure report the following systolicpressures (measured in mm Hg): before medication: after medication:change: ?y...
- Q - Using R Randomization Test -"When waiting to get someone's parking space, have you everthought that the driver you are waiting for is taking longer thannecessary? Ruback and Juieng (1997)...
- Q A point estimator is a sample statistic that provides a pointestimate of a population parameter. Complete the followingstatements about point estimators.Given two unbiased estimators of the same population parameter,the estimator...
- Q 12. An agricultural research company has developed two new typesof soy bean seeds, call them "seed A" and "seed B". A study isconducted to determine which will produce a higher...
- Q When one company (A) buys another company(B), some workers ofcompany B are terminated. Terminated workers get severance pay. Tobe fair, company A fixes the severance payment to company B workersas...
- Q Select any data set . Use the method of Sections 6-6 toconstruct a histogram and normal quartile plot, then determinewhether the data set appears to come from a normally distributedpopulation.
- Q A regression Study involving 32 convenience stores wasundertaken to examine the relationship between monthly newspaperadvertising expenditures (X) and the number of the customersshopping at the store (Y). A partial ANOVA...
- Q Sheldon Pikyeeter has peculiar eating habits. For dinner, healways eats spaghetti 3 times per week, cheese pizza twice a week,Thai chicken one time per week, and tacos once a week....
- Q The numbers below represent heights (in feet) of 3-year old elmtrees.5.1, 5.5, 5.8, 6.1, 6.2, 6.4, 6.7, 6.8, 6.9, 7.0,7.2, 7.3, 7.3, 7.4, 7.5, 7.7, 7.9, 8.1, 8.1, 8.2,8.3, 8.5,...
- Q In the manufacturing process of carbon composition resistorshistorical records indicate that 80% of these components havesuperior quality, 10% have very good quality, 5% have marginalquality and 5% are poor (non-shippable)....
- Q A study is conducted of the relationship between a newborn’sweight and the amount of cigarette smoking by the mother. A strong,negative relationship is found; that is, the more the mothersmokes,...
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