Average Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.loan-calc-container {
max-width: 700px;
margin: 30px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
h1, h2 {
color: #004a99;
text-align: center;
margin-bottom: 20px;
}
.input-group {
margin-bottom: 20px;
padding: 15px;
border: 1px solid #e0e0e0;
border-radius: 5px;
background-color: #fdfdfd;
}
.input-group label {
display: block;
font-weight: bold;
margin-bottom: 8px;
color: #004a99;
}
.input-group input[type="text"],
.input-group input[type="number"] {
width: calc(100% – 20px);
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
font-size: 1em;
}
.input-group .help-text {
font-size: 0.85em;
color: #666;
margin-top: 5px;
}
button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #004a99;
color: white;
border: none;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease;
margin-top: 10px;
}
button:hover {
background-color: #003366;
}
#result {
margin-top: 30px;
padding: 20px;
background-color: #e7f3ff;
border: 1px solid #004a99;
border-radius: 5px;
text-align: center;
}
#result h3 {
margin-top: 0;
color: #004a99;
font-size: 1.4em;
}
#result-value {
font-size: 2.5em;
font-weight: bold;
color: #28a745;
}
.article-section {
margin-top: 40px;
padding: 25px;
background-color: #fff;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.article-section h2 {
text-align: left;
margin-bottom: 15px;
}
.article-section p, .article-section ul {
margin-bottom: 15px;
}
.article-section ul li {
margin-bottom: 8px;
}
.article-section code {
background-color: #eef1f4;
padding: 2px 6px;
border-radius: 3px;
font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
}
Understanding and Calculating Averages
The average, often referred to as the arithmetic mean, is a fundamental concept in mathematics and statistics. It represents a central or typical value in a set of numbers. Calculating the average provides a single number that summarizes a collection of data points, making it easier to understand trends, compare datasets, and draw conclusions.
How to Calculate the Average (Arithmetic Mean)
The process of calculating the average is straightforward:
- Sum all the numbers: Add together every number in your dataset.
- Count the numbers: Determine how many individual numbers are in your dataset.
- Divide the sum by the count: The result of this division is the average.
Mathematically, this can be represented as:
Average = (Sum of all numbers) / (Count of numbers)
Example Calculation
Let's calculate the average of the following set of numbers: 5, 12, 18, 25, 30.
- Step 1: Sum the numbers: 5 + 12 + 18 + 25 + 30 = 90
- Step 2: Count the numbers: There are 5 numbers in the set.
- Step 3: Divide the sum by the count: 90 / 5 = 18
Therefore, the average of the numbers 5, 12, 18, 25, and 30 is 18.
Why is the Average Useful?
The average is a versatile tool used across many fields:
- Education: To calculate the average score of students on an exam.
- Finance: To determine the average return on investment over a period.
- Health and Fitness: To track average daily calorie intake or average heart rate.
- Surveys and Research: To find the average response to a question or the average age of participants.
- Sports: To analyze player performance, such as average points per game.
By simplifying complex datasets into a single, representative value, the average helps in quick analysis and informed decision-making.
function calculateAverage() {
var numbersInput = document.getElementById("numbers").value;
var resultDiv = document.getElementById("result");
var resultValueDiv = document.getElementById("result-value");
if (!numbersInput) {
alert("Please enter some numbers.");
return;
}
var numberStrings = numbersInput.split(',');
var numbers = [];
var sum = 0;
var count = 0;
for (var i = 0; i < numberStrings.length; i++) {
var numStr = numberStrings[i].trim();
if (numStr !== "") {
var num = parseFloat(numStr);
if (!isNaN(num)) {
numbers.push(num);
sum += num;
count++;
} else {
alert("Invalid input: '" + numStr + "' is not a valid number.");
return;
}
}
}
if (count === 0) {
alert("No valid numbers were entered.");
return;
}
var average = sum / count;
resultValueDiv.innerText = average.toFixed(2); // Display average with 2 decimal places
resultDiv.style.display = "block";
}