Chapter 11Analysis of Variance389c)There is sufficient evidence at the 0.10 level of significance of a difference between themean charges for foreign and USA medical graduates.d)There is sufficient evidence to say at the 0.10 level of significance that mean chargesdepend on both primary specialty and medical school.ANSWER:aTYPE: MCDIFFICULTY: DifficultKEYWORDS: two-factor analysis of variance, interaction, interpretation42.Referring to Table 11-5, what degrees of freedom should be used to determine the critical valueof theFratio against which to test for differences in the mean charges for doctors among the fourprimary specialty areas?a)numeratordf= 1, denominatordf= 159b)numeratordf= 3, denominatordf= 159c)numeratordf= 1, denominatordf= 152d)numeratordf= 3, denominatordf= 152ANSWER:dTYPE: MCDIFFICULTY: EasyKEYWORDS: two-factor analysis of variance,Ftest for factor, degrees of freedom43.Referring to Table 11-5, what degrees of freedom should be used to determine the critical valueof theFratio against which to test for differences between the mean charges of foreign and USAmedical school graduates?a)numeratordf= 1, denominatordf= 159b)numeratordf= 3, denominatordf= 159c)numeratordf= 1, denominatordf= 152d)numeratordf= 3, denominatordf= 152ANSWER:cTYPE: MCDIFFICULTY: EasyKEYWORDS: two-factor analysis of variance,Ftest for factor, degrees of freedom44.Referring to Table 11-5, is there evidence of a difference between the mean charges of foreignand USA medical school graduates?