Question: Plasma-glucose levels are used to determine the presence of diabetics. Suppose the mean ln (plasma-glucose) concentration (mg/dL) in 35-44 age groups is 4.86 with standard deviation of 0.54. A study of 100 sedentary people in the age group is planned to test if they have higher or lower level of plasma glucose than the general population. If the expected difference is 0.10 ln from the mean of the population, for this sample average, is there enough evidence to conclude that the there is change in the plasma glucose level.