Math 534 week Study guides, Class notes & Summaries

MATH 534 Week 7 Homework Problems 1. A real estate analyst this develop da multiple regression line 2. Thefollowingisapartialcomputeroutputofamultipleregressionanalysis of a data set containing 20 sets of observations on thedependentvariable 3. Acostaccountantisdevelopingaregressionmodeltopredictthetotal cost of producing a batch of printed circuit boards as a linearfunctionofbatchsize (the numberof boardsproducedinonelotorbatch), production plant (Kingsland, and Yorktown), and producti...

1. Question: Suppose a random sample of 400 is selected from a population with a standard deviation of 5. If the sample mean is 25, the 98% confidence interval to estimate the population mean is between ________. 2. Question: The point estimate of the population mean is _________. 3. Question: Suppose a random sample of 50 is drawn from a population whose standard deviation is unknown. If the sample mean is 70 and the sample standard deviation is 5, the 92% confidence interval to estimate the ...

1. Question: Given a random variable X follows a Normal distribution with mean 10 and standard deviation 2. Question: Scores on a certain exam are normally distributed with a mean of 90 and a variance of 25. 3. Question: A normal distribution is defined by two parameters, the mean and the Standard Deviation 4. Question: If for a certain x value in a normal distribution with mean equal to 4 the z-value is such that Larger than 4 5. Question: Suppose X is normally distributed with mean 50 and ...

If the occurrence or non occurrence of one event does not affect the occurrence or non occurrence of another event ,the two event sare In any statistical experiment if the occurrence of one event precludesthe occurrence of the other events, the events of the experiment arecalled . In the experiment of a single roll of a 6-faced die, if the outcome “3showsup”iscalledeventAandtheoutcome“4showsup”iscalledeventB,thenAandBare . Fifty percent of all technical assistants would like to have...

1. Question: Scores on a certain exam are normally distributed with a mean of 90 and a variance of 25. What is the z-value for a score of 80? 2. Question: Scores on a certain exam are normally distributed with a mean of 90 and a variance of 25. What is the probability of obtaining a score less than 80? 3. Question: Which one of the following is not a characteristic of a normal distribution? 4. Question: If the z-value of a given x value is positive, it means that ___________. 5. Question: As...

1. Question: Classify each of the following as nominal, ordinal, interval, or ratio data. 2. Question: The activity or the process of collecting the data on the population is called . 3. Question: A company wants to learn the customers’ purchase habits of buying certain products. This company did a survey about a random 1000 customers, who were asked about the times they purchased the certain products within one month. Then what is the data in this example: 4. Question: Researchers often wi...

1. Question:Arealestateanalysthasdevelopedamultipleregressionline,y=60+0.068x1–2.5x2,topredicty=themarketpriceofahome(in $1,000s),usingindependentvariables,x1=thetotalnumberofsquare feetoflivingspace,andx2=theageofthehouseinyears.The regressioncoefficientofx2suggeststhis: _____. 2. Question:Thefollowingisapartialcomputeroutputofamultipleregressionanalysis of a data set containing 20 sets of observations on thedependentvariable. Theregressionequationis SALEPRIC=1470+0.8145LANDVAL+0.8204IMP...

A company makes men's button-up dress shirts and is considering changes to its design. Howmight the company go about finding a good sample of individuals? These decisions wouldincludemethodofsampling,locationofsampling,populationtoconsider,andnumberinsample,in additionto any other considerations.

2. Scoresonacertainexamarenormallydistributedwithameanof90andavarianceof25.99.8 7. AccordingtoanNRFsurveyconductedbyBIGresearch,theaveragefamilyspendsabout $23 8. AccordingtotheAirTransportAssociationofAmerica,theaverageoperatingcostofanMD 10. Selectionofthesamplesbasedontheconvenienceoftheresearcherisanexampleof non random sampling 14. TheAluminumAssociationreportsthattheaverageAmericanuses56.8poundsofalumin 16. Ifreasonablylargesizedsamples(i.e.,samplesof30elementsormore)aredrawnfroma ...