# Learn Advanced Array Methods by Building a Statistics Calculator - Step 22

### Tell us what’s happening:

Describe your issue in detail here.
since getMean takes an array as an argument, how can we use 2 arguments when we call it again?

`````````javascript
/* file: script.js */
const getMean = (array) => array.reduce((acc, el) => acc + el, 0) / array.length;

/* User Editable Region */

const getMedian = (array) => {
const sorted = array.sort((a, b) => a - b);
const median = array.length % 2 === 0
? (sorted[sorted.length / 2 - 1] + sorted[sorted.length / 2]) / 2
: sorted[Math.floor(sorted.length / 2)];
}

/* User Editable Region */

const calculate = () => {
const value = document.querySelector("#numbers").value;
const array = value.split(/,\s*/g);
const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));

const mean = getMean(numbers);

document.querySelector("#mean").textContent = mean;
}
``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`

### Challenge Information:

Learn Advanced Array Methods by Building a Statistics Calculator - Step 22

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In what case would you want to pass two arguments?

1 Like

Sorry.
So the code is like this:

const getMean = (array) => array.reduce((acc, el) => acc + el, 0) / array.length;

const getMedian = (array) => {
const sorted = array.sort((a, b) => a - b);
const median = array.length % 2 === 0
? (sorted[sorted.length / 2 - 1] + sorted[sorted.length / 2]) / 2
: sorted[Math.floor(sorted.length / 2)];
}
And it doesn’t pass. Instead I get this message:

If the `array.length` is even, your `median` variable should use the `getMean` function to calculate the mean of the two middle numbers. Your first argument should be the value of `sorted` at `array.length / 2` , and the second at `array.length / 2 - 1` .

How is it possible to use getMean with 2 arguments since it only one array as an argument?

1 Like

You can’t use `getMean` with two arguments anywhere. That message is a bit of a mess.

You need to pass an array with two entries.

2 Likes

I was stuck on this for a long time. You do need to pass it an array but it also needs to be in parenthesis. In case this helps anyone else get unstuck