# CONFIDENCE.NORM: Google Sheets Formulas Explained

Hey there, fellow spreadsheet enthusiasts! Are you tired of manually calculating confidence intervals? Do you find yourself lost in a sea of numbers and struggling to make sense of your dataset? Fear not, for Google Sheets has got you covered - specifically with the CONFIDENCE.NORM formula!

Now, you're probably wondering what the heck a confidence interval is, right? Essentially, it's a range of values that we can be confident contains the true mean of a population. And the CONFIDENCE.NORM formula allows us to calculate this range based on the sample data we have in our spreadsheet.

So, let's dive into the nitty-gritty details of how to use this formula. Firstly, we need to provide the formula with the significance level we want. This is usually denoted as alpha, and is typically set at 0.05. For example:

`=CONFIDENCE.NORM(0.05,A2:A10)`

The above formula calculates the confidence interval at a 95% significance level for the values in cells A2 to A10. Easy, right?

But what if we want to change the significance level? No problemo! We just change the first parameter in the formula to our desired level. For example:

`=CONFIDENCE.NORM(0.01,A2:A10)`

Now we're calculating the confidence interval at a 99% significance level. Exciting stuff!

But wait, there's more! What if we don't know the standard deviation of our population? Not to worry, we can use the CONFIDENCE.NORM formula to calculate it for us based on our sample data. Simply add another parameter to the formula, like so:

`=CONFIDENCE.NORM(0.05,A2:A10,,TRUE)`

The final parameter set to true lets the formula know that we want to calculate the standard deviation as well. Genius!

But what if we have a large dataset or want to calculate multiple confidence intervals at once? Thankfully, Google Sheets has an array formula to make our lives easier:

`=ArrayFormula(CONFIDENCE.NORM(0.05,A2:A10:A100))`

Voila! Now we have calculated confidence intervals for all the values in cells A2 to A100. And the best part? We only had to enter the formula once!

Overall, the CONFIDENCE.NORM formula is a handy tool to have in your spreadsheet arsenal. Whether you're a data analyst, a scientist, or just a curious spreadsheet enthusiast, this formula can save you time and sanity when it comes to calculating confidence intervals. So go forth, my friends, and let your data flourish!