Statistics Flashcards
Normal Distribution Curve
It turns out that natural phenomena such as age, height, and pretty much any other attribute have similar distributions of values. There are a few small ones, lots of ones in the middle, and a few large ones.
Example
At the extremes, there are not too many people shorter than four feet or taller than seven feet, with most people around the middle. How these numbers vary from low to high is called their distribution. More precisely, it is a distribution of their frequency or number of times they occur in the dataset. The average of all these heights is between 65 and 70 inches, and the majority of the people cluster there.
The Standard Deviation
The standard deviation (SD) is a measurement of how much variability there is in a dataset
