BIOLOGY 1A03 Study Guide - Comprehensive Final Guide: Null Hypothesis, Lactase, Transpiration

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Dr.Da Silva

Document Summary

1. 1. 1 state that error bars are a graphical representation of the variability of data. Shows range of data/ standard deviation (68% of the sample) 1. 1. 2 calculate the mean and standard deviation of a set of values: find mean, calculate standard deviation by squaring mean, find mean sum of standard deviation. 1. 1. 3 state that the term standard deviation is used to summarise the spread of values around the mean, and that 68% of the values fall within one standard deviation of the mean. 68% of data values will fall within one standard deviation of the mean. 95% of data values will fall within two standard deviations of the mean. 99. 8% of data values will fall within three standard deviations of the mean. 1. 1. 4 explain how the standard deviation is useful for comparing the means and spread of data between two or more samples. The sd allows us to compare scores that have been measured using two very different scales.