 # HYPGEOM.DIST

In this comprehensive guide, we will explore the HYPGEOM.DIST formula in Excel. The HYPGEOM.DIST function is a statistical function that calculates the probability of a given number of successes in a sample drawn from a finite population without replacement. This function is particularly useful in situations where you need to analyze the likelihood of a specific outcome in a sample, such as quality control, market research, or survey analysis.

## HYPGEOM.DIST Syntax

The syntax for the HYPGEOM.DIST function in Excel is as follows:

HYPGEOM.DIST(sample_s, number_sample, population_s, number_population, cumulative)

Where:

• sample_s is the number of successes in the sample.
• number_sample is the size of the sample.
• population_s is the number of successes in the population.
• number_population is the size of the population.
• cumulative is a logical value that determines the form of the function. If TRUE, the function returns the cumulative distribution function; if FALSE, it returns the probability mass function.

## HYPGEOM.DIST Examples

Let’s look at some examples of how to use the HYPGEOM.DIST function in Excel.

Example 1: Suppose you have a batch of 100 light bulbs, and 10 of them are defective. You randomly select 20 light bulbs from the batch. What is the probability of finding exactly 3 defective light bulbs in the sample?

=HYPGEOM.DIST(3, 20, 10, 100, FALSE)

In this example, the function returns the probability mass function, which calculates the probability of finding exactly 3 defective light bulbs in the sample.

Example 2: Using the same batch of 100 light bulbs with 10 defective ones, what is the probability of finding 3 or fewer defective light bulbs in a sample of 20?

=HYPGEOM.DIST(3, 20, 10, 100, TRUE)

In this example, the function returns the cumulative distribution function, which calculates the probability of finding 3 or fewer defective light bulbs in the sample.

## HYPGEOM.DIST Tips & Tricks

Here are some tips and tricks to help you effectively use the HYPGEOM.DIST function in Excel:

1. Remember that the HYPGEOM.DIST function assumes that the sampling is done without replacement. This means that once an item is selected from the population, it is not returned to the population.
2. Ensure that the values for sample_s, number_sample, population_s, and number_population are non-negative integers. Otherwise, the function will return a #NUM! error.
3. When using the cumulative distribution function (cumulative = TRUE), the result will include the probability of the specified number of successes as well as all smaller numbers of successes.
4. If you need to calculate the probability for a range of successes, you can use the HYPGEOM.DIST function in combination with the SUM function. For example, to calculate the probability of finding between 2 and 4 defective light bulbs in the previous example, you can use the following formula:

=SUM(HYPGEOM.DIST(2, 20, 10, 100, FALSE), HYPGEOM.DIST(3, 20, 10, 100, FALSE), HYPGEOM.DIST(4, 20, 10, 100, FALSE))

## Common Mistakes When Using HYPGEOM.DIST

Here are some common mistakes to avoid when using the HYPGEOM.DIST function:

1. Using decimal values for sample_s, number_sample, population_s, or number_population. These arguments must be non-negative integers.
2. Forgetting to specify the cumulative argument. If omitted, Excel will return a #NUM! error.
3. Using the HYPGEOM.DIST function for situations where sampling is done with replacement. In such cases, consider using the BINOM.DIST function instead.

## Why Isn’t My HYPGEOM.DIST Working?

If you encounter issues when using the HYPGEOM.DIST function, consider the following troubleshooting steps:

1. Check the values of sample_s, number_sample, population_s, and number_population. Ensure they are non-negative integers.
2. Verify that the cumulative argument is specified as either TRUE or FALSE.
3. Ensure that the sampling scenario is appropriate for the HYPGEOM.DIST function (i.e., sampling without replacement).
4. Double-check the formula for any typos or incorrect references to cell ranges.

## HYPGEOM.DIST: Related Formulae

Here are some related formulae that you might find useful when working with the HYPGEOM.DIST function:

1. BINOM.DIST: Calculates the probability of a given number of successes in a fixed number of trials with a constant probability of success, assuming sampling with replacement.
2. POISSON.DIST: Calculates the probability of a given number of events occurring in a fixed interval, assuming a constant average rate of occurrence.
3. NORM.DIST: Calculates the probability of a given value in a normal distribution, assuming a specified mean and standard deviation.
4. CHISQ.DIST: Calculates the probability of a given value in a chi-square distribution, assuming a specified number of degrees of freedom.
5. F.DIST: Calculates the probability of a given value in an F-distribution, assuming specified numerator and denominator degrees of freedom.

By understanding the HYPGEOM.DIST function and its related formulae, you can effectively analyze and interpret statistical data in Excel. With practice, you’ll be able to confidently apply this function to a wide range of real-world scenarios.

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