what is the difference between a line and bar graph?
Bar graphs display data in a way that is similar to line graphs. Line graphs are useful for displaying smaller changes in a trend over time. Bar graphs are better for comparing larger changes or differences in data among groups.
how do you determine the number of trials in an experiment?
The number of trials required is then defined as where the cumulative mean first falls within this reference mean ± standard deviation threshold × reference standard deviation for all subsequent cumulative mean values.