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Info5ek
  • Member for 9 years, 8 months
  • Last seen more than 1 year ago
  • chicago
30 votes
3 answers
53k views

R: Random Forest throwing NaN/Inf in "foreign function call" error despite no NaN's in dataset [closed]

15 votes
4 answers
2k views

Pitfalls to avoid when transforming data?

7 votes
1 answer
2k views

Is it ever okay to ignore heteroskedastic residuals and continue with analysis?

7 votes
1 answer
5k views

How do I create and interpret an interaction plot in ggplot2?

6 votes
1 answer
10k views

Model construction: when to shuffle data and when to sort it?

4 votes
2 answers
1k views

Does a zig-zagging residual plot mean that normality has been violated?

3 votes
1 answer
156 views

How does the squared residual of a high leverage sample observation differ from the population's variance?

2 votes
1 answer
13k views

Calculating Variance of Y in linear regression model given variance of X and e where e = error term

2 votes
1 answer
116 views

What about throwing out 2/3rds of a data set?

2 votes
1 answer
17k views

R: Missing levels of categorical variable in summary of linear model [duplicate]

2 votes
1 answer
48 views

What is an indicator in statistics and why is it used to refine models?

1 vote
1 answer
23 views

R: Time series: Difference of arrays returns 0 instead of true difference

1 vote
1 answer
48 views

R not testing certain variables in forward stepwise regression?

1 vote
1 answer
262 views

Visually random model residuals, yet heteroskedastic? ( very small Breusch-Pagan Test P-Value)

1 vote
1 answer
1k views

How to reference R's automatically generated dummy variables in a linear model

1 vote
1 answer
66 views

When is the probability of a variable equivalent to a function of the variable i.e. when does p(x)=f(x)?

0 votes
1 answer
22 views

Matplotlib: Why would a KNN regression model draw a line through ALL points regardless of K?

0 votes
1 answer
75 views

Probability of observing value EQUAL to +2 SD in a standard normal dist with parameters N(0,1) [duplicate]

0 votes
1 answer
870 views

How to determine a null and alternative hypotheses and interpret F-test results, a specific example

0 votes
1 answer
80 views

Testing Independent variables impact during different decades

0 votes
0 answers
612 views

R: Is it possible to retrieve a KNN model's predicted Y at a given point?

0 votes
1 answer
258 views

What does it mean to build a so-called mean equation?

0 votes
1 answer
774 views

Using ACF or PACF to build an AR(p) model?

-1 votes
1 answer
762 views

KNN regression: Why does my In sample RMSE look like my out of sample RMSE across K values?