Measures of Center Flashcards
(8 cards)
What are measures of center?
Measures of center are used in statistics. They are used to find something related to the center.
This includes mean and median
What is mean
Mean is the average for a set of numbers
What is the median
The median in statistics is the middle value of a data set when the numbers are arranged in order.
How do you find the median
- Arrange the data set from least to greatest
- Find the middle value
How do you find the mean
- Add up all the numbers
2.Divide the sum by how many numbers there are
For example, 10, 3, and 4, I first add them all up (17), then I divide (in this case, 3). So the mean is 5.7
What measure of center is used for skewed data sets?
A skewed data set is when the data is not balanced, and it favors one side more than the other
Median
It’s median because it is less affected by the greater numbers
What measure of center is used for symmetrical data sets?
Mean
Because it best represents the center of distribution
What is mode
Mode means that out of all the numbers in the data set, x number is the most common (or greastest)
X is a placeholder