<span><em><span style、"font-family: 'times new roman', times, serif;">F</span></em>检验法</span>
<span><em><span style、"font-family: 'times new roman', times, serif;">t</span></em>检验法</span>
<span><em><span style、"font-family: 'times new roman', times, serif;">U</span></em>检验法</span>
<span><em><span style、"font-family: 'times new roman', times, serif;">X<sup>2</sup></span></em>检验法</span>