1. 钟形：如果这些假设真的成立,那麼以价格变动为横轴,每种变动发生的机率为纵轴,画出房价变动的机率分配图,应该是以平均数为中心的钟形(bell shape)曲线. 钟的形状取决於房价波动性:波动性愈大,曲线就愈平缓. 由此得出的模型,可能会在两方面出错.
2. 喇叭皮带线盆：bell set ==> 编钟 | bell shape ==> 喇叭皮带线盆 | bell shaped chain wheel ==> 杯形链轮
1. Bell even praised " Harry's forceful leadership " as leaving the company in strong shape.