STATISTICS

Answer the given problem. Analyze what tool should be used.

A study by Thienprasiddhi et al. examined a sample of 16 subjects with open-angle glaucoma and unilateral hemifield 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 = 0.05.

These are the steps to solve the problem:

1. Hypothesis ex. H0: = 9.0 H1: 9.0 2. Level of significance ex. = 0.01 3. Test Statistic ex. z = x - 0 / / n 4. Critical Region ex. graph and /2 = +-0.025 5. Computation ex. compute using formula 6. Decision ex. accept H0 since the computed z-value falls in the region of acceptance. 7. Conclusion ex. there is no reason to believe the ...