Monday, January 13, 2014

What percentage of values fall within 1 standard deviation of the mean? And 2?

About 68.27% of the values lie within one standard deviation of the mean. Similarly, about 95.45% of the values lie within two standard deviations of the mean.

What do error bars indicate?

Error bars indicate different things in different cases, they can range from errors in data collection to standard deviation, the can indicate room for mistakes in both directions from the current plotted point

What is the importance of standard deviation with regards to the mean?

Standard deviation is derived from the variance which involves using the mean and squaring values. Standard deviation shows which values follow the central tendencies of the data from the mean in either direction