Thread: Z Scores

Because of the populaity of movies as an entertainment medium for college students, you plan to do a national study of the average cost of a movie ticket. If you assume that the standard deviation of the population = $0.50, what samle size would you have to take to be 95% confident that your estimate was within $0.25 of the true mean ticket prices?

Originally Posted by jax760

Because of the populaity of movies as an entertainment medium for college students, you plan to do a national study of the average cost of a movie ticket. If you assume that the standard deviation of the population = $0.50, what samle size would you have to take to be 95% confident that your estimate was within $0.25 of the true mean ticket prices?

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