an investigator collected on heights and weights of collage students .the correlation between height and weight for men was 0.6,for women it was about the same.if men and women are taken together,will the correlation between height and weight be more than 0.6,less than 0.6 or about equal to 0.6.
求详细解法（采用什么方式解答 ）
相关系数介于区间[-1，1]内。当相关系数为-1，表示完全负相关，表明两项资产的收益率变化方向和变化幅度完全相反。当相关系数为+1时，表示完全正相关，表明两项资产的收益率变化方向和变化幅度完全相同。当相关系数为0时，表示不相关。