14. In a random sample (n=50) of public schools in Puerto Rico, 21 were found to have high-speed internet access. It is desired to construct a confidence interval (1-) for the proportion of schools in Puerto Rico with high-speed internet connection, using the distribution of the normal unit variable (Z). Use the appropriate formula to see if the normal scenario is met. n = 50 p = 21/50 q = 1- p

For the previous problem, calculate the following: a. point estimator: b. Ratio standard error: c. If the assumption of normality is verified, indicate the value of the Z table: d. If the assumption of normality is verified, construct the corresponding range, calculating the upper and lower limits: