The average production cost for major movies is 67 million dollars and the standard deviation is 19 million dollars. Assume the production cost distribution is normal. Suppose that 35 randomly selected major movies are researched. Answer the following questions. Round all answers to 4 decimal places where possible. What is the distribution of XX? XX ~ N(,) ---------- , ---------- What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)------------- , ---------- For a single randomly selected movie, find the probability that this movie's production cost is between 68 and 74 million dollars. ------------ For the group of 35 movies, find the probability that the average production cost is between 68 and 74 million dollars. ------------ For part d), is the assumption of normal necessary? No Y

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