10.65 Lauren, a brunette, was tired of hearing

“blondes have more fun.” She set out to “prove”

that “brunettes are more intelligent.” Lauren randomly

(as best she could) selected 40 blondes and 40 brunettes at her high school. The following overall grade statistics were calculated:

Blondes nBl  40 x Bl  88.375 sBl  6.134 Brunettes nBr  40 x Br  87.600 sBr  6.640 Upon seeing the sample results, does Lauren have support for her claim that “brunettes are more intelligent than blondes”? Explain. What could Lauren say about blondes’ and brunettes’ intelligence?