Box plots for sequencing quality score (generated by FastQC). The blue line represents the mean quality score for each base. Red lines represent medians. Yellow boxes represent 25th to 75th percentiles. The upper and lower whiskers represent 10 and 90 percentiles, respectively.
Yu and Sun BMC Bioinformatics 2013 14:274 doi:10.1186/1471-2105-14-274