The researchers prepared five videotapes job interviews, using the same two male
ID: 3180577 • Letter: T
Question
The researchers prepared five videotapes job interviews, using the same two male actors for each. A set script was designed to reflect an interview with an application of average qualifications. The tapes differed only in that the applicant appeared with a different handicap. In one, he appeared in a wheelchair; in a second, he appeared on crutches; in another, his hearing was impared; in a fourth, he appears to have one leg amputated; and in the final tape, he appeared to have no handicap. Seventy undergraduate students from a U.S. university were randomly assigned to view the tapes, fourteen to teach tape. After viewing the tape, each subject rated the qualifications of the application on a 0- to 10-point applicant qualification scale. Some research questions we wish to study are:
1. Do subjects systematically evaluate qualifications differently according to the candidates handicaps? If so, which handicaps produce the different evaluations?
For this question:
1) What test would you use to answer this question and why should you use this test? (Data is listed Below)
2) If the null hypothesis is rejected, what test would be used to determine which handicap is different?
Score Handicap 1.9 None 2.5 None 3 None 3.6 None 4.1 None 4.2 None 4.9 None 5.1 None 5.4 None 5.9 None 6.1 None 6.7 None 7.4 None 7.8 None 1.9 Amputee 2.5 Amputee 2.6 Amputee 3.2 Amputee 3.6 Amputee 3.8 Amputee 4 Amputee 4.6 Amputee 5.3 Amputee 5.5 Amputee 5.8 Amputee 5.9 Amputee 6.1 Amputee 7.2 Amputee 3.7 Crutches 4 Crutches 4.3 Crutches 4.3 Crutches 5.1 Crutches 5.8 Crutches 6 Crutches 6.2 Crutches 6.3 Crutches 6.4 Crutches 7.4 Crutches 7.4 Crutches 7.5 Crutches 8.5 Crutches 1.4 Hearing 2.1 Hearing 2.4 Hearing 2.9 Hearing 3.4 Hearing 3.7 Hearing 3.9 Hearing 4.2 Hearing 4.3 Hearing 4.7 Hearing 5.5 Hearing 5.8 Hearing 5.9 Hearing 6.5 Hearing 1.7 Wheelchair 2.8 Wheelchair 3.5 Wheelchair 4.7 Wheelchair 4.8 Wheelchair 5 Wheelchair 5.3 Wheelchair 6.1 Wheelchair 6.1 Wheelchair 6.2 Wheelchair 6.4 Wheelchair 7.2 Wheelchair 7.4 Wheelchair 7.6 WheelchairExplanation / Answer
The evidence that subjects rate qualifications differently according to handicap status is moderately strong ,but not convincing (F-Test p-value=0.030).The difference between the avg qualification score given to crutches candidate and to the hearing-impaired candidate is difficult to attribute to chance.The difference is estimated to be 1.87 points higher for the crutches tape,with a 95% confidence interval from 0.14 to 3.60 based on the Tukey-Kramer procedure.The strongest evidence supports a difference between the average scores given to wheel chair and crutches handicaps and the average scores given to amputee and hearing handicaps (t-statistic=3.19 ).None of the average qualification scores from the various feigned handicaps differ significantly from the no handicap control.(The protected least significant differences all have two-sided p-values>0.05)