Category: Statistics
What is One-way ANOVA? Formula and Example
One-Way ANOVA is to compare the means of different groups, to see whether the mean difference is statistically significant. For instance, you would like to compare the average household size of three cities. You can collect 3 samples from these...
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Correlation: Definition, Formula, and Examples
1. What is Correlation? Correlation is a statistical measure of the relationship between two variables, X and Y. For instance, you can measure to what extent temperature (X) is related to the production of ice cream (Y). You probably would...
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How to Write Null and Alternative Hypotheses
How to Write Null and Alternative Hypotheses
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When to Use t-test versus Correlation in Data Analysis
Since both correlation and t-test are about relationships between X and Y, what is the difference between them and when do you use t-test (or correlation)? This tutorial aims to answer these two questions. The following figure presents the difference...
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What is the Difference between Independent and Paired Sample t-test
This tutorial explains what t-test is, and the difference between independent sample t-test (or two sample t-test) and paired sample t-test. It also explains what two-sample and one-sample t-test are. 1. What is independent sample t-test? Indepdent sample t-test examines...
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Difference between Scatter Plots and Line Charts in Python
This tutorial explains the difference between scatter plots and line charts in data visualization. I will use actual data and Python code to illustrate the nuanced difference between them. Data is pulled from Github. It includes keywords of Peloton and...
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How to Calculate Standard Deviation in Python (NumPy)
This short tutorial shows how you can calculate standard deviation in Python using NumPy.
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