Statistics question and answers for July 12, 2023
- Q Use a​ t-test to test the claim about the population mean μ atthe given level of significance alphaα using the given samplestatistics. Assume the population is normally distributed.​Claim: μ= 51,800;...
- Q An automobile manufacturer would like to know what proportion ofits customers are not satisfied with the service provided by thelocal dealer. The customer relations department will survey arandom sample of...
- Q 1. A researcher in a small town is interested in estimating thetrue proportion of adults in the town who smoke. 215 adults wererandomly selected from the town, and it was...
- Q The table below contains the widths of a product, showing 10samples of size 5 measurements each.123456789104042434140394541344238444643484845434347414044444337394042444341424340444648414242444041423940414243Construct a sample means, X control chart andR chart for the above data.Identify those subgroup...
- Q part a) x = 137, s = 14.2, n = 20, H0: μ = 132, Ha: μ ≠132, α =0.1A) Test statistic: t = 1.57. Critical values: t =...
- Q In a study on bromeliads (tropical epiphytic plants),researchers wanted to determine the effects of adding fertilizer onthe growth rates of these plants (please see number ofleaves and fertilizer columns on...
- Q Suppose an experiment was conducted to compare the fracturetoughness of high-purity steel of some type with commercial-puritysteel of the same type. For 9 high-purity specimens, the samplemean toughness and sample...
- Q a. Find the z value to the left of mean so that 0.025 percentof the area under the distribution curve lies to the left of it.Also report the area that...
- Q Assume that you have recently purchased a season pass for yourfavorite football team just like you have been doing for the last 5years. Suppose that the number of times you...
- Q Explain the use of the regression model assumptions?
- Q Descriptive Statistics questions MathA100 (Liberal ArtsMathematics)Gather a sample to analyse, describe how your sample wasgathered.Ask as many people as you can (or at least 30) the following twoquestions:\"what is the...
- Q Given an array A of n distinct real numbers, we say that a pairof numbers i, j ∈ {0, . . . , n−1} form an inversion of A if...
- Q Levi-Strauss Co manufactures clothing. The quality controldepartment measures weekly values of different suppliers for thepercentage difference of waste between the layout on the computerand the actual waste when the clothing...
- Q Some common strategies for treating hypertensive patients bynonpharmacologic methods include (1) weight reduction and (2)trying to get the patient to relax more by meditational or othertechniques. These strategies were evaluated...
- Q True or False: A bar chart is used most often when you want todisplay frequencies by categories.
- Q Why is the Mean Square due to Error a better estimate of thepopulation variance than the Mean Square due to Treatment? When isthe Mean Square due to Treatment also a...
- Q Q4. In a survey of3272adults aged 57 through 85​ years, it was found that81.1​%of them used at least one prescription medication.b. Construct a​ 90% confidence interval estimate of thepercentage of...
- Q 1a) How many five digit number can be written with the digits1,2,3,4 if there is an even number of twos?1b) How many five digit number can be written with the...
- Q Questions 3-4: You are guessing at random on an 11-questionmultiple choice quiz. Each question has five choices, one of whichis correct.3. What is the probability of getting 5 or more...
- Q A classifier is trained on a cancer dataset, and achieves 96%accuracy on new observations. Why might this not be considered agood classifier? How could it be improved?
- Q Problem 1Suppose that we check for clarity in 50 locations in Lake Tahoeand discover that the average depth of clarity of the lake is 14feet. Suppose that we know that...
- Q Snow Geese lay 4 eggs in a nest. A field biologist wanted toknow if there is a relationship between the order in which the eggsare laid and the sex of...
- Q You are interested ininvesting in two different shares. The anticipated annual returnfor a $1,000 investment in each share under different economicconditions is given below, together with the probability that eachof...
- Q Suppose that whether or not it rains today depends on previousweather conditions through the last two days.Specifically, suppose that if it has rained for the past twodays, then it will...
- Q Are beer, wine, and liquor consumed equally by Americans? Arandom sample found that out of 647 people, 293 selected beer, 218selected wine, and 136 selected liquor.1. What are the null...
- Q Questions 36-39: Six numbers are selected at random froma random number generator and entered into each of four rows. Thesummary statistics are presented in the chart below.MeanSD  Row 15.8 0.78Row 23.6 0.23Row...
- Q CountryMyanmarEthiopiaBurkina FasoGhanaIndiaKenyaNicaraguaGuatemalaPeruAlgeriaChinaColombiaLebanonEcuadorArgentinaMexicoTunisiaVenezuela, RBBrazilTurkeyGreecePortugalUnited Arab EmiratesMaltaSpainIsraelItalyUnited KingdomJapanIrelandFinlandIcelandBelgiumNew ZealandFranceCanadaGermanyAustriaNetherlandsAustraliaDenmarkSwedenLuxembourgUnited StatesNorwaySwitzerlandhealth $ per capita202735587578178233359362420569569579605677785923947103717432097240524712658291032583377370342394612466248844896495952925411558156946031646368088138940395229674Find a 95% confidence interval for the mean amount of money percapita spent on healthcare. (To do this you will...
- Q Suppose you have to pay $2 for a ticket to enter a competition.The prize is $18 and the probability that you win is 1/3. Yourcurrent wealth is $10.(a) Are you...
- Q CountryBurkina FasoEthiopiaMyanmarGhanaKenyaIndiaNicaraguaTunisiaGuatemalaAlgeriaEcuadorPeruColombiaLebanonChinaBrazilMexicoTurkeyArgentinaVenezuela, RBGreecePortugalMaltaSpainItalyIsraelJapanFranceNew ZealandUnited Arab EmiratesBelgiumUnited KingdomCanadaGermanyFinlandAustriaNetherlandsIrelandAustraliaSwedenUnited StatesDenmarkIcelandLuxembourgSwitzerlandNorwayAverage Income6406601190138013801680205036903790427058205950632076808260884090401118011960125001896019850241402752031590361903800038950390704048041860423904366043660447304523046310525605442054630561805673056990766608124082330In 2016, the global average annual income worldwide wasestimated to be $10,850[1]. (This includes all countries of theworld, not just the countries...
- Q Small-business telephone users were surveyed 6 months afteraccess to carriers other than Carrier A became available for​wide-area telephone service. Of a random sample of260260Carrier A​ users,158158said they were attempting to...
- Q You collect data to answer theresearch question, “Are high school boys involved in moreautomobile accidents than high school girls?†After conducting ahypothesis test, you conclude that there is sufficient evidence...
- Q Mendel crossed pea plants that had yellow-round seeds withplants that had green-wrinkled seeds. The first generation producedplants with all yellow-round seeds. Self crossing of these plantsproduced the following F2 phenotypes:Yellow-RoundYellow-wrinkledGreen-roundGreen-wrinkledCount31510110832The...
- Q ***PLEASE SHOW HOW TO SOLVE IN EXCEL***Case Problem3:       Consumer Research, Inc.(Copy the worksheet named “Consumer†inQMB3200-Homework#10Data.xlsx into your file for this problem)Consumer Research, Inc., is an independent agency that conductsresearch on...
- Q 1. Marine biologists have noticed that the color of theoutermost growth band on a clam tends to be related to the time ofthe year in which the clam dies. A...
- Q 1. Elevated levels of plasma HDL cholesterol may be associatedwith lowered risk of coronary heart disease. Several studies havesuggested that vigorous exercise may result in increased levels ofHDL cholesterol. To...
- Q An individual wanted to determine the relation that might existbetween speed and miles per gallon of an automobile. Let X be theaverage speed of a car on the highway measured...
- Q A statistics professor claims that the average score on theFinal Exam was 83. A group of students believes that the averagegrade was lower than that. They wish to test the...
- Q Assume a standard customer, Johnny Rose, at a shop will spend 20mins in the shop. The shop has 4 customers on average and servicetime is random with known distribution. The...
- Q A block of memory contains 40 random words of data. Assume thatthe values are in two’scomplement representations and are stored in the Read/Writememory area. You need to provide the40 random...
- Q 1. A probability experiment is conducted. Which of the followingcannot be considered a probability of an outcome? 1) 0.23 2) 1.003) - 0.34 4) 0.05b- In a scientific study there...
- Q Q13. Twelve different video games showing substance use wereobserved and the duration of times of game play​ (in seconds) arelisted below. The design of the study justifies the assumption thatthe...
- Q 1- In a large shopping mall, a marketing agency conducted asurvey on credit cards. 100 peoplewere surveyed. The results are shown in the table.              Employment statusOwns acredit cardDoes not own a...
- Q Think of an instance when the health administrator mightuse a hypothesis for quantitative analysis. State the hypothesis,null hypothesis, variables, and how the analysis would bedone.
- Q With a standard deck of 52 playing cards, are your chances ofdrawing an ace and then a king better with or without\"replacement\"? Illustrate with computations.
- Q Determine whether the events described in wach excercise areoverlapping or non-overlapping. then find the either/or probabilityof the events.getting the sum of either 5 or 9 on a roll of two...
- Q The Salk Vaccine Trials of 1954 included a randomized controldouble blind study in which elementary school children ofconsenting parents were assigned at random to injection with theSalk Vaccine or a...
- Q Allen's hummingbird (Selasphorus sasin) has beenstudied by zoologist Bill Alther.†Suppose a small group of 10Allen's hummingbirds has been under study in Arizona. The averageweight for these birds is x...
- Q A psychology instructor wants to find out a suitable predictorof the Final examination marks of his students. He thinks that theAssignment marks or the Mid-term test marks can be used...
- Q The waiting period from the time a book is ordered until it isreceived is a random variable with the mean value 7 days and thestandard deviation 2 days. If Helen...
- Q Four cards are dealt from a deck of 52 cards.​(a) What is the probability that the ace ofspades is one of the 4 cards​?(b) Suppose one of the 4 cards...
- Q A random sample of 49 measurements from one population had asample mean of 10, with sample standard deviation 3. An independentrandom sample of 64 measurements from a second population had...
- Q A casino introduces a new game. In this game you roll a die andthe upper most number is recorded. If you roll an odd you lose. Ifyou roll a 2...
- Q In an August 2012 Gallup survey of 1,012 randomly selected U.S.adults (age 18 and over), 536 said that they were dissatisfied withthe quality of education students receive in kindergarten throughgrade...
- Q sxplain controllable factors and their types in doewith detail and example with subpart alsowrite full answer and not copy of google otherwisedislike
- Q A survey of 2,000 American citizens was taken in 2016. Theresults show that 1,000 people owned a rifle, 800 owned a hand gun,750 owned a shot gun, 250 owned a...
- Q Each student arrives in office hours one by one, independentlyof each other, at a steady rate. On average, three students come toa two-hour office hour time block. Let S be...
- Q 1) A book manufacturing company has two different productionplants, plant A and plant B. 40% of books come from plant A. Of thebooks that come from plant A 30% are...
- Q Researchers conducted a study looking at the effects of cookingcontainer type (aluminum, clay, iron) and food type (meat, legumes,vegetables) on the amount of iron present in the food aftercooking. They...
- Q I. Consider the random experiment of rolling a pair of dice.Note: Write ALL probabilities as reduced fractions or whole numbers(no decimals).1-12-13-14-15-16-11-22-23-24-25-26-21-32-33-34-35-36-31-42-43-44-45-46-41-52-53-54-55-56-51-62-63-64-65-66-62) How many outcomes does the sample space contain?_____36________3)Draw a...
- Q There are two servers. Hiba has just started service at server1, while Daniella has just started service at server 2. Hiba’sservice time at server 1 is exponentially distributed with mean...
- Q The systolic blood pressure of adults in the USA is nearlynormally distributed with a mean of 119 millimeters of mercury(mmHg) and standard deviation of 25.Someone qualifies as having Stage 2...
- Q A study was done to look at the relationship between number ofmovies people watch at the theater each year and the number ofbooks that they read each year. The results...
- Q QUESTION 4 ( 8 marks)A telemarketer is able make a sale on 27% of the phone calls hemakes. Assume that he makes 12 calls in an hour. Answer thefollowing questions,...
- Q 1.A researcher working with data about individuals’ ages and theirincome wants to know how income is related to age. Does income goup or down or remain constant with age? Which...
- Q QUESTION 1 Studd Enterprises sells big-screen televisions. A concern ofmanagement is the number of televisions sold each day. A recentstudy revealed the number of days that a given number oftelevisions...
- Q QUESTION 2Â Â According to Michael Theatre Ltd., the mean cost to run anightly theatre performance is $3,200 with a standard deviation of$460. Performance costs are known to follow a normalprobability...
- Q Over the past several years, the proportion of one-personhouseholds has been increasing. The Census Bureau would like totest the hypothesis that the proportion of one-person householdsexceeds 0.27. A random sample...
- Q Give an example of a study where it would be more appropriate toreport the standard deviation rather than the interquartile range.Explain why the standard deviation is the better choice.
- Q 1. A statistics professor classifies his students according totheir grade point average (GPA) and their class rank. GPA is on a0.0 – 4.0 scale, and class rank is defined as...
- Q A study estimates the mean annual family income for familiesliving in public housing in Chicago. For a random sample of 30families, the annual incomes (in hundreds of dollars) arehere:133 140...
- Q IndividualTelevisionRadio12225281032221422185252961310729108262593321101615111033123012134033141638154130Inrecent years, a growing array of entertainment options competes forconsumer time. By 2004, cable television and radio surpassedbroadcast television, recorded music, and the daily newspaper tobecome the two entertainment media...
- Q The weights of a certain dog breed are approximately normallydistributed with a mean of 52 pounds, and a standard deviation of6.7 pounds. Answer the following questions. Write your answers inpercent...
- Q Independent random samples of n1 = 800Â Â andn2 = 610 observations were selected from binomialpopulations 1 and 2, and x1 = 336 and x2 =378 successes were observed.(a) Find a 90%...
- Q In a secondary school, there are 400 male students and 600female students. 50% of the male students and 55% of the femalestudents are in senior secondary curriculum, the others are...
- Q A probability and statistics professor surveyed 11 students inher​ class, asking them questions about their study strategy. Thenumber of hours studied and the grade for the course test are inthe...
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