CHISQ.DIST.RT

How to Use the Power BI DAX function CHISQ.DIST.RT

Overview of the CHISQ.DIST.RT Function

The CHISQ.DIST.RT function takes three arguments: x, degrees of freedom, and cumulative. The x argument is the value at which to evaluate the distribution. The degrees of freedom argument is the number of degrees of freedom of the chi-squared distribution. The cumulative argument is a logical value that determines whether to return the cumulative distribution function (CDF) or the probability density function (PDF).

The CHISQ.DIST.RT function returns the right-tailed probability of the chi-squared distribution. This means that it calculates the probability that a random variable from the distribution is greater than or equal to the value of x.

Using the CHISQ.DIST.RT Function in Power BI

To use the CHISQ.DIST.RT function in Power BI, you can follow these steps:

1. Open Power BI and create a new report.

2. Add a table or a matrix visual to the report.

3. Click on the “New Measure” button in the “Fields” pane.

4. In the formula bar, type the formula for the CHISQ.DIST.RT function, including the arguments. For example, if you want to calculate the right-tailed probability for x=10 and degrees of freedom=5, you could use the following formula:


Probability = CHISQ.DIST.RT(10, 5, TRUE)


5. Press Enter to create the measure.

6. Drag the measure to the visual to see the result.

Example Usage of the CHISQ.DIST.RT Function

Let us consider an example to understand the usage of the CHISQ.DIST.RT function in Power BI. Suppose we have a dataset of test scores for a group of students. We want to calculate the probability that a student’s test score is greater than or equal to 80, given that the sample standard deviation of the scores is 10 and the sample size is 20.

To do this, we can use the CHISQ.DIST.RT function in Power BI as follows:

1. Create a new measure called “Probability of Score ❱= 80” using the formula:


Probability of Score ❱= 80 = CHISQ.DIST.RT((80-70)*SQRT(20)/10,19,TRUE)


In this formula, we are calculating the z-score for a score of 80, assuming that the mean score is 70, the standard deviation is 10, and the sample size is 20. We then use this z-score to calculate the right-tailed probability of the chi-squared distribution with 19 degrees of freedom.

2. Drag the “Probability of Score ❱= 80” measure to a visual to see the result.

By using the CHISQ.DIST.RT function in this way, we can calculate the probability that a student’s test score is greater than or equal to 80, given the sample standard deviation and size. This can help us make informed decisions about the students’ performance and identify any areas for improvement.

The CHISQ.DIST.RT function is a powerful statistical function in Power BI that can be used to calculate the right-tailed probability of the chi-squared distribution. By using this function, we can analyze data more effectively and make informed decisions based on statistical analysis. In this article, we explored how to use the CHISQ.DIST.RT function in Power BI and provided some examples of its usage. We hope this article has been helpful in understanding the CHISQ.DIST.RT function and its potential applications in Power BI.

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