The heights of college basketball player is assumed normally distributed with a known standard deviation of 5 inches. The heights of a sample of 20 players was found to be 75.2 inches. Find a 80% confidence interval for the population mean. What is the critical value z, for a 80% confidence interval? See INPUT FORMAT BELOW! ______________________________ Note: Enter XXX.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 347 is entered as 347.0, 3.524 is entered as 3.5, 0.2750 is entered as 0.28, -0.566 is entered as -0.57