why get the mean ?

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https://www.statology.org › importance-of-mean

https://www.statology.org › importance-of-mean
Why is the Mean Important in Statistics? – Statology
18 févr. 2022In statistics, the mean is important for the following reasons: 1. The mean gives us an idea of where the center of a dataset is located. 2. Because of how it’s calculated, the mean carries a piece of information from every observation in a dataset. The following example illustrates both of these reasons.

https://www.khanacademy.org › math › statistics-probability › summarizing-quantitative-data › mean-median-basics › a › mean-median-and-mode-review

https://www.khanacademy.org › math › statistics-probability › summarizing-quantitative-data › mean-median-basics › a › mean-median-and-mode-review
Mean, median, and mode review (article) | Khan Academy
Mean: The average number; found by adding all data points and dividing by the number of data points. Example: The mean of 4 , 1 , and 7 is ( 4 + 1 + 7) / 3 = 12 / 3 = 4 . Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are two middle numbers, taking the of those two numbers).

https://www.scribbr.com › statistics › mean

https://www.scribbr.com › statistics › mean
How to Find the Mean | Definition, Examples & Calculator – Scribbr
The mean tells us that in our sample, participants spent an average of 50 USD on their restaurant bill. Outlier effect on the mean. Outliers are extreme values that differ from most values in the data set. Because all values are used in the calculation of the mean, an outlier can have a dramatic effect on the by pulling the away from the majority of the values.

https://www.scribbr.com › statistics › central-tendency

https://www.scribbr.com › statistics › central-tendency
Central Tendency | Understanding the Mean, Median & Mode – Scribbr
The mean, median and mode are all equal; the central tendency of this dataset is 8. Skewed distributions. In skewed distributions, more values fall on one side of the center than the other, and the mean, median and mode all differ from each other. One side has a more spread out and longer tail with fewer scores at one end than the other.

https://statisticsbyjim.com › basics › measures-central-tendency-mean-median-mode

https://statisticsbyjim.com › basics › measures-central-tendency-mean-median-mode
Mean, Median, and Mode: Measures of Central Tendency
A measure of central tendency identifies where values are more likely to occur-or where they *tend* to occur. Hence, tendency.. Central is more applicable to the mean and median. Both of these measures identify a central point in the distribution. This central point is where the values are more likely to occur.

https://statistics.laerd.com › statistical-guides › measures-central-tendency-mean-mode-median.php

https://statistics.laerd.com › statistical-guides › measures-central-tendency-mean-mode-median.php
Mean, Mode and Median – Measures of Central Tendency – Laerd
In fact, in any symmetrical distribution the mean, median and mode are equal. However, in this situation, the mean is widely preferred as the best measure of central tendency because it is the measure that includes all the values in the data set for its calculation, and any change in any of the scores will affect the value of the .

https://www.mathsisfun.com › mean.html

https://www.mathsisfun.com › mean.html
How to Calculate the Mean Value – Math is Fun
How to Find the Mean. The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. Example 1: What is the Mean of these numbers? 6, 11, 7. Add the numbers: 6 + 11 + 7 = 24;

https://www.khanacademy.org › math › cc-sixth-grade-math › cc-6th-data-statistics › mean-and-median › a › calculating-the-mean

https://www.khanacademy.org › math › cc-sixth-grade-math › cc-6th-data-statistics › mean-and-median › a › calculating-the-mean
Calculating the mean (article) | Khan Academy
158, 156, 85, 145, 157, 159. 85 is the outlier. Without the 85 the mean would be 155, but with the 85 the mean is about 143. Just one number makes the mean decrease by 12. An outlier always affects a data set, because an outlier is a number that is nowhere near the current set of numbers.

https://www.khanacademy.org › math › probability › xa88397b6:display-quantitative › xa88397b6:mean-median-data-displays › a › choosing-the-best-measure-of-center

https://www.khanacademy.org › math › probability › xa88397b6:display-quantitative › xa88397b6:mean-median-data-displays › a › choosing-the-best-measure-of-center
Measures of center: choosing the best option (article) – Khan Academy
Choosing the best measure of center. Mean and median both try to measure the central tendency in a data set. The goal of each is to get an idea of a typical value in the data set. The mean is commonly used, but sometimes the median is preferred.

https://en.wikipedia.org › wiki › Mean

https://en.wikipedia.org › wiki › Mean
Mean – Wikipedia
The generalized mean, also known as the power mean or Hölder mean, is an abstraction of the quadratic, arithmetic, geometric, and harmonic means. It is defined for a set of n positive numbers xi by. [2] By choosing different values for the parameter m, the following types of means are obtained: lesoutrali bot