which variable is used to determine the gender of male vs female hair? how to do a meta-analysis of hair colour how is gender related to hair color how to investigate network of variables in multivariate meta-analysis in r what are effect sizes for male and female hair what is the size of hair in light vs dark how to analyze the interaction of gender and light hair what is gender in r meta-analysis how to find the relationship between hair length and length what is the arithmetic value of r meta-analysis what is the relationship between size and color of hair in the r meta-analysis? how to investigate the interaction between the three variables how to investigate the relationship between hair size and color what are the effect sizes between a female and a male what is the difference between light hair and dark hair how to find the gender and light hair size how to measure the difference between black and light hair lengths r how to investigate gender and hair color how to determine if there is a difference between hair length and hair color difference between light and dark hair size of a male