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Hypothesis Tests in R

How to Calculate Pooled Standard Deviation in R

A pooled standard deviation is simply a weighted average of standard deviations from two or more independent groups. In statistics it appears most often in...

How to Calculate Standard Deviation of Columns in R

You can use the following basic syntax to calculate the standard deviation of columns in R: #calculate standard deviation of one column sd(df$col1) #calculate standard deviation of...

The Complete Guide: Hypothesis Testing in R

A hypothesis test is a formal statistical test we use to reject or fail to reject some statistical hypothesis. This tutorial explains how to perform...

How to Calculate Weighted Standard Deviation in R

The weighted standard deviation is a useful way to measure the dispersion of values in a dataset when some values in the dataset have...

How to Calculate Pooled Variance in R

In statistics, pooled variance refers to the average of two or more group variances. We use the word “pooled” to indicate that we’re “pooling” two...

How to Perform a Log Rank Test in R

 A log rank test is the most common way to compare survival curves between two groups. This test uses the following hypotheses: H0: There is no...

How to Perform Bartlett’s Test in R (Step-by-Step)

Bartlett’s test is a statistical test that is used to determine whether or not the variances between several groups are equal. Many statistical tests (like...

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