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BIT 3434 Final Exam Questions And 100% Accurate Answers
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BIT 3434 Final Exam Questions And 100%Accurate Answers
in decision- making problem, anchoring effects occur when - Answer a seemingly trivial
factor serves as a starting point for estimation
mathematical model is considered to be "Valid" when - Answer it represents relevant
characteristics of the object or decision correctly
Variables are termed independent when they satisfy which of the following - Answer The
function value depends upon their value
Which of the following steps may be the most crucial part of the problem-solving
process? - Answer identify problem
Regression Model - Answer Y = f(X1, x2, ., xk) + E
The regression function indicates the - Answer average value the dependent variable
assumes for a given value of the independent variable
On the average, the differences between the actual and predicted values of Y - Answer
Sum to zero
Beta 1 = x1 when comes to regression, so if it says b1 looking at first variable not
coefficient - Solution If p value is very small less than 0.05 than we reject the null
100(1-a)% for Y when X = Xh - Solution Y-hat +- t(1-a/2,n-2)Sp
, R2 for x1 and x3 same as x3 separate - Answer X1 doesn't not reduce ESS enough to
compensate for its addition to the model
If it has 7 discrete levels - Answer It has 6 binary variables, so if u have n discrete levels
then binary variable is n-1
What type of data mining tasks category does a researcher tries to predict the value for
a continuous response variable based on the data set. - Answer Prediction
Overfitting refers to - Answer giving too much importance to the noise specific to the
sample
first step in creating a classification tree, the - Answer independent variables have to be
recursively partitioned based on the outcome of the previous partitions
Confusion matrix, correct classification outcome - Answer its actual actual + predicted
predicted/ total total so 19/25 in ex
in confusion matrix model accuracy is displayed as - Answer precision
in confusion matrix model ability to detect actual positives is - Answer sensitivity recall
what do we call the probability of the observed test statistics given that the null
hypothesis is true - Answer P-Value
What is the component s in decomposition of the Total of sum squares - Answer TSS =
ESS +RSS, The error of sum squares - Residual sum of squares, and RSS
What are two activities you need to do before identifying which tools to use? - Answer
Run Descriptive analysis and clean the data
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