pdf 0.15 $4 0.15 $8 0.20 $15 0.40 $22 Tip amount Use the following information to answer questions 3-6: Suppose that waiters' tips across all customers and restaurants in California are distributed according to the pdf pictured above (the blue numbers represent areas within the intervals in which they are pictured). 3. What is the median tip amount? (Don't enter a dollar sign as part of your answer) (If the answer cannot be determined without more information, enter 99 as your answer) 4. What is the probability that a waiter will receive a tip between $4 and $15? (If you think the answer is 23%, write 23 for your answer. Do NOT write 0.23 and do NOT write 23%).

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