# Google Sheets NEGBINOMDIST Function: Syntax, Examples & Tips - URL: https://betteranalyst.com/google-sheets/negbinomdist-function - Author: Better Analyst Formula Bot is now Better Analyst—same account, more powerful analysis.Formula Bot is now Better Analyst—same account and workflows, with more powerful analysis, dashboards, and automation. [Learn what changed](https://betteranalyst.com/formula-bot-is-now-better-analyst) The NEGBINOMDIST function calculates the probability of a specified number of successes in a negative binomial distribution. ``` NEGBINOMDIST(num_failures, num_successes, prob_success) ``` Generate FormulaExplain Formula One free generation or explanation per browser, shared across Excel and Google Sheets. Account usage limits apply afterward. Describe the NEGBINOMDIST you need in plain EnglishGenerate Formula ## Parameters **`num_failures`**:\ The number of failures until the experiment is stopped. **`num_successes`**:\ The number of successes that you want to achieve. **`prob_success`**:\ The probability of success on each trial. ## What is NEGBINOMDIST? The *NEGBINOMDIST* function in Google Sheets is a statistical function used to calculate the probability of a given number of failures before a specified number of successes occurs in a series of Bernoulli trials. This function is particularly useful in scenarios where you want to model the number of failures that occur before achieving a certain number of successes, making it an essential tool for probability analysis. In simpler terms, NEGBINOMDIST helps you understand the likelihood of experiencing a certain number of failures before reaching your goal of successes. ## A Practical Example Imagine you are conducting a quality control test on a manufacturing process, and you want to determine the probability of finding a certain number of defective items before you achieve a specified number of non-defective items. ### Parameters: - **k**: The number of failures (defective items) you want to observe. - **r**: The number of successes (non-defective items) you want to achieve. - **p**: The probability of success on each trial (the likelihood of an item being non-defective). For example, let's say you want to find the probability of getting 3 defective items before finding 5 non-defective items, with a 70% chance of an item being non-defective (30% chance of being defective). ## NEGBINOMDIST Formula To achieve this, you would use the NEGBINOMDIST function as follows: ``` =NEGBINOMDIST(3, 5, 0.7) ``` In this formula: - `3` is the number of failures (defective items). - `5` is the number of successes (non-defective items). - `0.7` is the probability of success (the probability of an item being non-defective). ## Result of the Formula When you apply the NEGBINOMDIST formula, it will return the probability of observing 3 defective items before achieving 5 non-defective items. The output will be a decimal value representing this probability. ## Why Use NEGBINOMDIST? NEGBINOMDIST is beneficial because it allows you to model real-world scenarios involving repeated trials with a focus on failures and successes. It provides insights into the likelihood of various outcomes, which can be crucial for decision-making in fields such as quality control, risk assessment, and project management. ## Key Takeaways: - **NEGBINOMDIST**: A statistical function that calculates the probability of a specified number of failures before achieving a certain number of successes. - **Applications**: Useful in quality control, risk assessment, and any scenario involving repeated trials with binary outcomes. - **Understanding Probabilities**: Helps in understanding the likelihood of different outcomes in a probabilistic model. NEGBINOMDIST is an essential function for anyone working with statistical analysis in Google Sheets, providing a powerful way to enhance your understanding of probabilities and outcomes. Happy analyzing! ## Example use case You have a table where Column A lists the number of failures before success, Column B lists the probability of success, and Column C calculates the negative binomial distribution using NEGBINOMDIST. This helps in analyzing the likelihood of achieving a certain number of successes in a given scenario. ## Need more help with Google Sheets formulas? Sign up for Better Analyst and get unlimited AI-powered formula generation, explanations, and advanced data analysis. [Create Free Account](https://betteranalyst.com/signup)[Try Formula Generator](https://betteranalyst.com/excel-ai) ## Google Sheets how-to guides - [How To Unhide Columns In Google Sheets](https://betteranalyst.com/google-sheets/how-to-unhide-all-columns-in-google-sheets) - [How To Unhide Rows In Google Sheets](https://betteranalyst.com/google-sheets/how-to-unhide-all-rows-in-google-sheets) - [How To Unprotect Google Sheets](https://betteranalyst.com/google-sheets/how-to-unprotect-google-sheets) - [How To Wrap Text In Google Sheets](https://betteranalyst.com/google-sheets/how-to-wrap-text-in-google-sheets) - [Google Sheets Conditional Formatting](https://betteranalyst.com/google-sheets/google-sheets-conditional-formatting) - [How To Add A Column In Google Sheets](https://betteranalyst.com/google-sheets/how-to-add-a-column-in-google-sheets) - [How To Alphabetize In Google Sheets](https://betteranalyst.com/google-sheets/how-to-alphabetize-in-google-sheets) - [How To Autofit In Google Sheets](https://betteranalyst.com/google-sheets/how-to-autofit-in-google-sheets) ## Explore all Google Sheets formulas Browse our complete library of Google Sheets formula guides Compare your options ## Decide with evidence, not a sales pitch. 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