# Medical school graduate the president theorizes that

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medical school graduate. The president theorizes that foreign graduates will have higher meancharges than USA graduates. To investigate this, the president also collected data on 20 foreignmedical school graduates in each of the 4 primary specialty types described above. So information oncharges for 40 doctors (20 foreign and 20 USA medical school graduates) was obtained for each ofthe 4 specialties. The results for the ANOVA are summarized in the following table.SourcedfSSMSFPR > FSpecialty322,8557,61860.940.0001Med school11051050.840.6744Interaction38902972.380.1348Error15218,950Total15942,80039.Referring to Table 11-5, what was the total number of doctors included in the study?a)20b)40c)159d)160ANSWER:dTYPE: MCDIFFICULTY: EasyKEYWORDS: two-factor analysis of variance, properties40.Referring to Table 11-5, what degrees of freedom should be used to determine the critical valueof theFratio against which to test for interaction between the two factors?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 interaction, degrees of freedom41.Referring to Table 11-5, interpret the test for interaction.a)There is insufficient evidence to say at the 0.10 level of significance that the differencebetween the mean charges for foreign and USA graduates depends on primary specialty.b)There is sufficient evidence to say at the 0.10 level of significance that the differencebetween the mean charges for foreign and USA graduates depends on primary specialty.
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?

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Probability distribution, Probability theory, Discrete probability distribution, Continuous probability distribution