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Table 2 Levene’s test and student’s t -test of LCF

From: Lip closing force of Class III patients with mandibular prognathism: a case control study

  Levene’s test t-test for equality of means
  F Sig. t df Sig. (2-tailed) Mean difference Std. error difference 95% confidence interval of the difference
Lower Upper
MaxUL 17.233 .000 -.282 131 .778 -.041 .146 -.331 .248
AveLL 35.573 .000 -1.677 131 .096 -.281 .167 -.612 .050
MaxLL 1.196 .276 3.513 130.674 .001 .541 .154 .236 .845
AveLL 2.853 .094 5.204 128.774 .000 .681 .131 .422 .940
  1. Max UL indicates maximum upper lip closing force; Ave UL, average upper lip closing force; Max LL, maximum lower lip closing force; Ave LL, average lower lip closing force;
  2. The t-test result of MaxLL and AveLL were adjusted according to the Levene’s Test.