Statology is a go-to platform for students, data analysts, financial analysts, statisticians, and researchers, providing clear concise descriptive tutorials along with practical examples. We are listing our 15 most popular articles from 2024 based on their popularity, accessibility, and usefulness.
1. Slovin’s Formula Calculator
Slovin’s Formula Calculator automatically calculates sample size based on the value of Population Size (N) and Acceptable Margin of Error (e). The calculator uses Slovin’s formula: n = N / (1 + Ne²) to estimate a simple sample size.
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2. The Complete Guide: How to Report ANOVA Results
This tutorial describes how to report ANOVA results. A one-way ANOVA is used to determine whether there is a statistically significant difference between the means of three or more independent groups.
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3. Shannon Diversity Index: Definition & Example
Shannon Diversity Index explains how to measure species diversity within a community. With the formula: H = -Σ(pi * ln(pi)), where pi is the proportion of each species in the community. Higher values of H indicate greater diversity. The article provides detailed instructions, examples, and an explanation of its significance in ecology and biodiversity studies.
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4. STDEV.P vs. STDEV.S in Excel: What’s the Difference?
This article shows the difference between STDEV.P and STDEV.S in Excel with practical examples. The STDEV.P function calculates the population standard deviation; on the other hand, the STDEV.S function calculates the sample standard deviation.
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5. How to Select Rows by Index in a Pandas DataFrame
This article explains how to select the rows of a pandas DataFrame based on their index value. You can use the .iloc function to select rows based on integer indexing and use the .loc function to select rows based on label indexing, you can use the .loc function.
Read the Full Article: How to Select Rows by Index in a Pandas DataFrame.
6. How to Change Legend Labels in ggplot2 (With Examples)
This tutorial shows the use of scale_fill_discrete() function to change legend labels in ggplot2. This method allows you to customize the labels for fill legends in plots like box plots or bar charts.
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7. Multiple Linear Regression by Hand (Step-by-Step)
Multiple linear regression is used to quantify the relationship between two or more predictor variables and a response variable. This article shows how to perform multiple linear regression by hand. It covers calculating sums of squares, regression coefficients, and constructing the regression equation.
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8. Paired Samples t-test: Definition, Formula, and Example
A paired samples t-test is used to compare the means of two samples when each observation in one sample can be paired with an observation in the other sample. This article explains the motivation, formulas, and assumptions along with examples to perform paired samples t-test.
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9. How to Read the Chi-Square Distribution Table
The Chi-Square distribution table is a table that shows the critical values of the Chi-Square distribution. To use the Chi-Square distribution table, you only need to know two values: the degrees of freedom and the alpha level for the test (common choices are 0.01, 0.05, and 0.10). This tutorial explains how to read and interpret the Chi-Square distribution table.
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10. Matplotlib: How to Color a Scatterplot by Value
To shade the color of points within a matplotlib scatterplot based on some third variable. You can use the matplotlib.pyplot.scatter() function. This tutorial explains several examples of how to use this function in practice.
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11. How to Find Class Boundaries (With Examples)
In a frequency distribution, class boundaries are the values that separate the classes. This article shows how to use these steps in practice to calculate class boundaries in a frequency distribution with practical examples.
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12. A Quick Intro to Leave-One-Out Cross-Validation (LOOCV)
To evaluate the performance of a model on a dataset, we need to measure how well the predictions made by the model match the observed data. Leave-one-out cross-validation (LOOCV) is a model evaluation method where one observation is excluded from the dataset as a test set, while the remaining data forms the training set. This process repeats for each observation, and the model’s mean squared error (MSE) is averaged across all iterations.
Read the Full Article: A Quick Intro to Leave-One-Out Cross-Validation (LOOCV)
13. 10 Examples of Using Probability in Real Life
Probability refers to how likely an event is to occur. It is used in all types of areas in real life including weather forecasting, sports betting, investing, and more. This article shows how probability is used in 10 real-life situations on a regular basis.
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14. How to Create Progress Bars in Excel (Step-by-Step)
Progress bars are used to track the goals of a project or any assigned tasks. The article explains how to create progress bars in Excel to visually track progress toward goals. You can use conditional formatting and simple Excel functions to design dynamic progress bars.
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15. Google Sheets: A Simple Formula for “If Not Empty”
The article shows how to use the If Not Empty argument in the Google Sheets formula. It explains how to check if a cell is not empty and return a specific value or calculation. This tutorial includes practical examples to show the use of the If Not Empty argument of the IF function.
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These 15 tutorials are among the most popular resources of 2024, covering topics in Statistics, Python, R, Excel, and Google Sheets. Check out this full article to learn more about statistics. Statology’s author significantly contributes to the statistics community with accessible learning materials.
