MATH 534 APPLIED MANAGERIAL STATISTICS (MATH534)
Devry University
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MATH 534 Week 7 Discussion Predictive Analytics (Keller)
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MATH 534 Week 7 Discussion Predictive Analytics (Keller) 
 
Predictiveanalyticsisaninnovativeanalyticsdivisionthatuseshistoricaldatacombinedwith mathematical simulation, data mining techniques and machine learning to makeforecasts about future results.In order to detect threats and prospects, businessesemploy predictiveanalytics tofindtrendsin thisknowledge.
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MATH 534 Week 7 Course Project Final Part C Regression and Correlation Analysis
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MATH 534 Week 7 Course Project Final Part C Regression and Correlation Analysis 
 
For this regression analysis we will choose X1-calls as Independent Variable and Y-Sales asDependentVariable.ThereasonbehinditisbecausethecorrelationcoefficientbetweenTimeandYearswith Salesisweakerthan Callswith Sales.
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MATH 534 Week 6 Quiz (v2)
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3	If the correlation coefficient between variables X and Y is roughly zero, then 
6	In the equation y = m x + b, which represents a straight lime, b is the 
7	If the relationship between y and x is given by the equation y = 1.57 − 0.0407 x, the slope coefficient 0.0407 means this for every unit increas
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MATH 534 Week 6 Quiz (v1)
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MATH 534 Week 6 Quiz (v1) 
 
1.	Avalueof-1forthecoefficientofcorrelationbetweentwovariablesmeansthatthetwovariablesare	. 
2.	Ifthereis positivecorrelationbetweentwosets ofnumbers,then 
 
3.	If the correlation coefficient between variables X and Y is roughlyzero,then	. 
4.	Determine the Pearson product-moment correlation coefficient forthefollowingdata.
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MATH 534 Week 6 Homework Problems (v2)
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2	Determine the Pearson product-moment correlation coefficient for the following data.x 
3	Given a set of paired data,{X,Y},if Y is independent of X , you would expect that the correlation
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MATH 534 Week 6 Homework Problems (v1)
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1.	Whichofthefollowingisnotanassumptionoftheregressionmodel? 
2.	Supposeforagivendatasettheregressionequationis:y=54.78+1.45x, and the point (0.00, 24.78) is in the data set. The residual forthispointis	. 
3.	If the standard error of the estimate for a regression model fitted toalargenumberofpairedobservationsis1.75,approximately68%oftheresidualswouldliewithin	. 
4.	Foraregressionmodely=30−2x,thecoefficientofdeterminationwasdeterminedasequalto0.81.Thecoefficientofcorrelationis
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MATH 534 Week 6 Discussion Regression Analysis
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MATH 534 Week 6 Discussion Regression Analysis 
 
Suppose you are given data from a survey showing the IQ of each person interviewed and the IQof his or her mother. That is all the information that you have. Your boss has asked you to puttogether a report showing the relationship between these two variables. What could you present,and why?
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MATH 534 Week 6 Discussion Regression Analysis (Keller)
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MATH 534 Week 6 Discussion Regression Analysis (Keller) 
 
Here,wearetalkingaboutregressionanalysis.Regressionanalysisreferstoa 
statisticalmethodofmodelingtherelationshipsbetweendifferentvariables(dependentand independent). It is used to describe and analyze relationships between data. Also,the regression analysis is used to make predictions, the relationships between databeingusedasabasis forforecastinganddesigningapredictionmodel.
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MATH 534 Week 6 Course Project Part B - Hypothesis Testing and Confidence Intervals
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ThisisProjectPartB:HypothesisTestingandConfidenceIntervals.Inthispartofproject,wewill conduct Hypothesis Testing for a few of variables and data set. Confidence Intervals willalso befound for thosevariables. 
 
2.	Compute99%confidenceintervalsforTrainingTypeusedinhypothesistestandinterpret theseintervals.
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MATH 534 Week 6 Addendum Homework-Quiz Review Keller Devry University
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MATH 534 Week 6 Addendum Homework-Quiz Review 
 
b.	Whatisthe90%confidenceintervalforchildrenwhoare12yearsold?Answer:(18.92, 21.72) 
 
13.	Hypothesistestsforindividualregressioncoefficients(i.e.B0,B1)modeluset-tests. 
 
9.	We want to predict weight (y) based on height (x).The following equation shows therelationship:ŷ=70+1.3x.Ifsomeoneis65inchestall,whatwouldthepredictedweightbe?Answer:154.5
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