# Tagged Questions

2answers
301 views

### How do I calculate standard errors for sums of OLS coefficients?

I'm estimating a simple OLS regression model of the type: $y = \beta X + u$ After estimating the model, I need to generate a weighted combination of coefficients (e.g. $w_1 \beta_1 + w_2 \beta_2$) ...
1answer
242 views

### What is the impact of low predictor variance on logistic regression coefficient estimates?

Let's say I am using a logistic model to predict whether it rains (yes or no) based on the high temperature and have collected data for the past 100 days. Let's say that it rains 30/100 days. ...
1answer
4k views

### Standard errors for multiple regression coefficients?

I realize that this is a very basic question, but I can't find an answer anywhere. I'm computing regression coefficients using either the normal equations or QR decomposition. How can I compute ...
2answers
2k views

### Extract standard errors of coefficient linear regression R [duplicate]

Possible Duplicate: How do I reference a regression model's coefficient's standard errors? If I have a dataset: ...
0answers
95 views

### Can I combine Standard errors of coefficients with an unbalanced data set?

I have just read the answers to the question ...... Adding coefficients to obtain interaction effects - what to do with SEs? .......and found this really helpful! I am looking to do something similar ...
{"extraction_info": {"found_math": true, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 2, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0}, "config": {"markdown_headings": true, "markdown_code": true, "boilerplate_config": {"ratio_threshold": 0.18, "absolute_threshold": 10, "end_threshold": 5, "enable": true}, "remove_buttons": true, "remove_image_figures": true, "remove_link_clusters": true, "table_config": {"min_rows": 2, "min_cols": 3, "format": "github"}, "remove_chinese": true, "remove_edit_buttons": true, "extract_latex": true}, "english_confidence": 0.8702192902565002, "perplexity_flag": "middle"}