Heights of adult males are known to have a normal distribution. a researcher claims to have randomly selected adult males and measured their heights with the resulting relative frequency distribution as shown here. identify two major flaws with these results. height (cm) relative frequency 130 dash –144 22 22% 145 dash –159 25 25% 160 dash –174 21 21% 175 dash –189 26 26% 190 dash –204 28 28%