Suppose the following table illustrates the ages for a number of participants projected to enroll into a clinical trial looking at early onset of dementia: 72, 69, 54, 56, 75, 75, 69. Assuming that these participants can be considered to be normally distributed, and that they come from a population with a standard deviation (SD) of 7.89 years, calculate a 95% Z-confidence interval for the mean age of the population they represent.