BIOLOGY 1A03 Lecture Notes - Lecture 1: Error Bar, Standard Deviation, Null Hypothesis

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

1. 1. 1 - state that error bars are a graphical representation of the variability of data. Error bars are a graphical representation of the variability of data. Error bars can be used to show either the range of data or the standard deviation on a graph. The value extending above and below one bar will be the same. When we collect data, it will always variation data because biological systems are subject to a genetic program and environmental variation. Time is sometimes too limited to be able to repeat experiments enough time to confirm an accurate result. Instead, we display data, we show the degree of variability in the readings. When we are doing this on a graph, we use error bars. Each error bar represents the range of readings obtained for that value, or the standard deviation. 1. 1. 2 - calculate the mean and standard deviation of a set of values.