
Khan Academy | Free Online Courses, Lessons & Practice
Khan Academy offers free, world-class education in various subjects including math, science, and arts, aiming to make learning accessible for everyone globally.
Calculating standard deviation step by step - Khan Academy
So, really standard deviation is: calculating the difference of each item to the mean, and squaring that value. Once you calculate all the values in a different list, you take the mean of that. Then, …
Arithmetic - Khan Academy
Unit 4: Understand fractions Unit mastery: 0% Fractions intro What fractions mean Fractions on the number line Fractions and whole numbers Equivalent fractions
Mean, median, & mode example - Khan Academy
Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us! Created by Sal Khan and Monterey Institute for …
Statistics intro: Mean, median, & mode (video) | Khan Academy
The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered …
Center, spread, and shape of distributions | Lesson
If the standard deviation is low, that means the numbers in your data set are clustered around the mean, whereas if the standard deviation is high, it means the numbers are more spread out …
Mean absolute deviation (MAD) (video) | Khan Academy
To find the Mean Absolute Deviation (MAD), first calculate the mean (average) of your data set. Next, find the absolute difference (distance) between each data point and the mean. Sum up …
Mean as the balancing point - Khan Academy
Explore how we can think of the mean as the balancing point of a data distribution. You know how to find the mean by adding up and dividing. In this article, we'll think about the mean as the …
Estimating mean and median in data displays - Khan Academy
In brief, the mean is a value that is nonresistant to extreme values/significant outliers, meaning that it would severely fluctuate if a new extreme value is introduced to the data. In contrast, the …
Mean absolute deviation example (video) | Khan Academy
The mean is found by adding all the values and dividing by the number of data points. The MAD is calculated by finding the average of the absolute differences from the mean.