17
Feb
Standard Deviation On Bell Curve. Standard deviation implies how spread-out the numbers are. A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution. By using a statistical package or a spreadsheet program you can quickly determine standard deviation and draw a curve of the population called the bell curve. Standard Deviation is the measure of dispersion or spread of a data.
If 30 hours is the mean that is the top of the graph and because 80 students watched 30 hours 80 must be the highest frequency. Draw a rough sketch of the bell curve. The mean identifies the position of the center and the standard deviation determines the height and width of the bell. To build the graph draw the x x and y y axis and locate the top of the graph. The mean and the standard deviation. A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution.
Roughly 68 of humans will have IQ scores that fall between 85 and 115 or one standard deviation above or below the average human IQ.
Let Z be the standard normal variate. 95 of the values data fall within 2 standard deviations of the mean in either. However I am attempting to plot the mean standard deviations along with the actual data on the bell curve. But I am not sure how to change the code to correctly represent my data on a bell curve. It is also known as called Gaussian distribution after the German mathematician Carl Gauss who first described it. In other words Standard Deviation talks about the deviation of data from mean value.