Question 4 22 pts In a 1998 study. adults in Arizona were observed for a 10-second interval in public places. such as malls and restaurants. Of the 702 people randomly observed in public. 315 smiled. 3. Check the conditions of the Central Limit Theorem. b. Find a 95% condence interval for the proportion of all adults in Arizona who smile in public. State the calculator function and inputs used. c. Interpret your condence interval in a complete sentence. d. Can we conclude that less than 50% of all adults in Arizona smile in public? Explain