Male Telescope Shiners Have Bigger Brains Than Females

Yeah, it's true (at least in simple average), this time I can illustrate it by presenting the ratio of brain volume to standard length for male and female telescope shiners. The sample size is 10 of each. The error bar in the figure is standard error, and the y-axis is ratio. As is typically the case with species like telescopes with little sexual dimorphism, the males have a higher ratio of brain volume to standard length, but not statistically significantly so as demonstrated by a two-tailed t-test (assuming unequal variance). Interestingly, running an F-test on male vs. female ratios shows marginal significance at P=0.05, so the variance is different between sexes.