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PatrickT
  • Member for 9 years, 10 months
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212 votes
17 answers
207k views

Intuitive explanation for dividing by $n-1$ when calculating standard deviation?

  • 20.1k
91 votes
7 answers
156k views

Calculating the parameters of a Beta distribution using the mean and variance

  • 1,498
64 votes
4 answers
120k views

Standard error for the mean of a sample of binomial random variables

  • 1,387
58 votes
4 answers
147k views

Manually Calculating P value from t-value in t-test

  • 683
57 votes
3 answers
36k views

Box-Cox like transformation for independent variables?

  • 20.1k
54 votes
4 answers
65k views

Replicating Stata's "robust" option in R

  • 541
42 votes
2 answers
112k views

Finding Quartiles in R

35 votes
6 answers
219k views

How do I calculate a weighted standard deviation? In Excel?

  • 555
32 votes
4 answers
33k views

Are there default functions for discrete uniform distributions in R?

24 votes
5 answers
7k views

Why are we using a biased and misleading standard deviation formula for $\sigma$ of a normal distribution?

  • 11.9k
22 votes
3 answers
61k views

Computing percentile rank in R [closed]

  • 6,731
21 votes
4 answers
14k views

Transformation to increase kurtosis and skewness of normal r.v

20 votes
5 answers
2k views

Should we teach kurtosis in an applied statistics course? If so, how?

  • 94.7k
20 votes
1 answer
4k views

Why do t-test and ANOVA give different p-values for two-group comparison?

  • 303
17 votes
5 answers
61k views

How does the sampling distribution of sample means approximate the population mean?

  • 273
12 votes
6 answers
21k views

Quartiles in Excel

  • 802
12 votes
2 answers
713 views

Using lm for 2-sample proportion test

9 votes
2 answers
9k views

Connection between sum of normally distributed random variables and mixture of normal distributions

  • 5,936
7 votes
3 answers
34k views

How to add horizontal lines to ggplot2 boxplot?

6 votes
1 answer
19k views

Maximum Likelihood Curve/Model Fitting in Python

5 votes
1 answer
21k views

Adding noise to a column of data

  • 105