Q141
Open questionIf Linear regression model perfectly first i.e., train error is zero, then . . . . . . . .
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R Programming · all questionsData Visualization with ggplot2
Data Visualization with ggplot2
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Q142
Open questionWhich of the following metrics can be used for evaluating regression models?
i) R Squared
ii) Adjusted R Squared
iii) F Statistics
iv) RMSE / MSE / MAE
i) R Squared
ii) Adjusted R Squared
iii) F Statistics
iv) RMSE / MSE / MAE
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Q143
Open questionHow many coefficients do you need to estimate in a simple linear regression model (One independent variable)?
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Q144
Open questionIn a simple linear regression model (One independent variable), If we change the input variable by 1 unit. How much output variable will change?
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Q145
Open questionFunction used for linear regression in R is . . . . . . . .
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Q146
Open questionIn syntax of linear model lm(formula,data,..), data refers to . . . . . . . .
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Q147
Open questionIn the mathematical Equation of Linear Regression Y = β1 + β2X + ϵ, (β1, β2) refers to . . . . . . . .
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Q148
Open question. . . . . . . . is an incredibly powerful tool for analyzing data.
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Q149
Open questionThe square of the correlation coefficient r 2 will always be positive and is called the . . . . . . . .
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Q150
Open questionPredicting y for a value of x that's outside the range of values we actually saw for x in the original data is called . . . . . . . .
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Q151
Open questionWhat is predicting y for a value of x that is within the interval of points that we saw in the original data called?
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Q152
Open questionAnalysis of variance in short form is?
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Q153
Open question. . . . . . . . is a simple approach to supervised learning. It assumes that the dependence of Y on X1, X2, . . . Xp is linear.
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Q154
Open questionAlthough it may seem overly simplistic, . . . . . . . . is extremely useful both conceptually and practically.
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Q155
Open questionWhen there are more than one independent variables in the model, then the linear model is termed as . . . . . . . .
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Q156
Open questionThe parameter β0 is termed as intercept term and the parameter β1 is termed as slope parameter. These parameters are usually called as . . . . . . . .
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Q157
Open questionThe sum of squares of the difference between the observations and the line in the horizontal direction in the scatter diagram can be minimized to obtain the estimates is generally called?
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Q158
Open question. . . . . . . . regression method is also known as the ordinary least squares estimation.
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Q159
Open question. . . . . . . . refers to a group of techniques for fitting and studying the straight-line relationship between two variables.
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Q160
Open questionIn order to calculate confidence intervals and hypothesis tests, it is assumed that the errors are independent and normally distributed with mean zero and . . . . . . . .
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