Question 123456

1. For the 76 women classified with severe hip pain, the WOMAC mean function score was 70.7 with standard deviation of 14.6. We wish to know if we may conclude that the men function score for a population of similar women subjects with severe hip pain is less than 75.0. Let a =0.01. 2. A study by Thienprasiddhi et al. examined a sample of 16 subjects with open-angle glaucoma and unilateral hemified defects. The ages (years) of the subjects were: 62 62 68 48 51 60 51 57 57 41 62 50 53 34 62 61 Can we conclude that the mean age of the population from which the sample may be presumed to have been drawn is less than 60 years? Let a = 0.05. 3. The purpose of a study by Luglie et al. was to investigate the oral status of a group of patients diagnosed with thalassemia major (TM). One of the outcome measures was the decayed, missing, and filled teeth index (DMFT). In a sample of 18 patients the mean DMFT index value was 10.3 with a standard deviation of 7.3. Is this sufficient evidence to allow us to conclude that the mean DMFT index is greater than 9.0 in a population of similar subject? Let a = 0.10 (t= 0.76, Accept HO) 4. In a sample of 49 adolescents who served as the subjects in an immunologic study, one variable of interest was the diameter of skin test reaction to an antigen. The sample mean and standard deviation were 21 and 11 mm erythema, respectively. Can it be concluded from these data that the population mean is less than 30? Let a = 0.05. (Z=-5.73, Reject HO) 5. The following data are the oxygen uptakes (ml) during incubation of a random sample of 15 cell suspensions: 14.0, 14.1, 14.5, 13.2, 11.2, 14.0, 14.1, 12.2, 11.1, 13.7, 13.2, 16.0, 12.8, 14.4, 12.9 Do these data provide sufficient evidence that the 0.05 level of significance that the population mean is not 12 ml? (t=4.3268, Reject HO) 6. A survey of 100 similar-sized hospitals revealed a mean daily census in the paediatrics service of 27 with a standard deviation of 6.5. Do these data provide sufficient evidence to indicate that the population mean is different from 25? Let a =0.05. (Z=3.0769, Reject HO)