Quiz
Regression
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Fragen in diesem Quiz (20)
1Which of these could be an equation for the line of best fit / least squares regression?
- Ay = mx + c
- By = A0 + A1x
2In the equation y = mx + c, the mx is the [blank_start]gradient[blank_end], and the c is the [blank_start]intercept[blank_end].
- Agradient
- Bintercept
- Cintercept
- Dgradient
3The non-parametric measure of correlation, whereby data is converted into ranks and the correlation between these ranks is assessed, is called:
- ASpearman's rank correlation
- BPearson's correlation coefficient
4The range for Pearson's correlation coefficient is:
- Ap = -1 to 1
- Bp = 0 to 1
- Cp = 0 to 10
- Dp = 0 to 100
5In Pearson's correlation coefficient:
- Agradient doesn't matter, only correlation does
- Bcorrelation doesn't matter, only gradient does
- Cgradient doesn't matter, only intercept does
- Dintercept doesn't matter, only gradient does
6What are ANOVA, ANCOVA and linear regression examples of?
- AEmbedded models of feature selection
- BGeneral linear models
- CHypothesis testing
- DCorrelation coefficients
7What do general linear models assume about error?
- Athat error is normally distributed
- Bthat error is not normally distributed
- Cthat there is no error
- Dthat error is significantly different for every data point
8What is the test statistic for general linear models?
- AF ratio
- BP value
- Cy value
9How is the F ratio calculated?
- Atreatment mean square / error mean square
- Berror mean square / treatment mean square
- C1 - treatment mean square
- D1 - error mean square
10The treatment mean square describes the explained variation
- ARichtig
- BFalsch
11The error mean square describes the unexplained variation which is the 'signal'
- ARichtig
- BFalsch
12What is meant by the residual sum of squares?
- Asum of all the squared deviations between the data points and the fitted line
- Bsum of all the squared deviations between the data points and the group mean
- Csum of all the squared deviations between the data points and the total mean
13What does the R2 mean?
- AHow much variation can be explained by the model
- BHow much variation cannot be explained by the model
14What is meant by Simpson's Paradox?
- Awhen true correlations are hidden
- Bwhen false correlations are given
15The original data, what has actually been measured, is called:
- Ainterpolation
- Bextrapolation
16The predicted data from outside the original range is known as:
- Aextrapolation
- Binterpolation
17If the relationship is not a straight line, which of the following could work?
- Aappropriate polynomial explanatory variables (e.g. quadratic, cubic)
- Bnon-linear regression (e.g. Random Forest Regression)
- Cnone of the above
18What can be done if a relationship is not well described by polynomial explanatory variables?
- Anon-linear regression
- Blinear regression
- CANOVA
- DANCOVA
- Efeature selection
19Random Forest Regression is an example of non-linear regression.
- ARichtig
- BFalsch
20Which of the following are disadvantages of Random Forest Regression?
- Acan be slow to make new predictions
- Bcan oversimplify the data
- Ccan overfit the noise
- Dis very conceptually hard
Informationen
- Beschreibung
- MIBTP Statistics Quiz am Regression, erstellt von Bethany Richmond am 04/11/2018.
- Autor
- Bethany Richmond
- Sprache
- English
- Aufrufe
- 1
- Schlagwörter
- Bewertung
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