A survy of 238 cell phone users found that 102 had an Android phone. Find an 80% confidence interval for the population proportion of cell phone users that have an Android phone. What is the UPPER BOUND? ______________________________ Note: Enter XXX.X X AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 134.784 is entered as 134.78, 35.295 is entered as 35.30, .2749 is entered as 0.27, -.5650 is entered as -0.57