16.3 This problem uses the context and data from Examples 16.1 and 16.3 in the text. After taking 684 observations (as computed in Example 16.3), the observed proportion was found to be = 0.15 (as in Example 16.1), instead of 0.20 as the foreman had originally estimated. Recompute the number of observations required for this new proportion, and if the value is less than 684, determine (a) the new confidence level that is obtained from 684 observations and (b) the new value of c, the half-width of the confidence interval at the original confidence level of 95%. 16.3 This problem uses the context and data from Examples 16.1 and 16.3 in the text. After taking 684 observations (as computed in Example 16.3), the observed proportion was found to be = 0.15 (as in Example 16.1), instead of 0.20 as the foreman had originally estimated. Recompute the number of observations required for this new proportion, and if the value is less than 684, determine (a) the new confidence level that is obtained from 684 observations and (b) the new value of c, the half-width of the confidence interval at the original confidence level of 95%