Mathematics
Mathematics, 27.09.2019 04:00, jonestmoney381

Amovie theater manager wants to determine whether popcorn sales have increased since the theater switched from using "butter-flavored topping" to real butter. historically the average popcorn revenue per weekend day was approximately $3,500. after the theater started using real butter, the manager randomly sampled 12 weekend days and calculated the sampleā€™s summary statistics. the average revenue per weekend day in the sample was approximately $4,200 with a standard deviation of $140. select the function that would correctly calculate the 90% range of likely sample means. a. 3,500Ā±confidence. t(0.10,140,12)b. 4,200Ā±confidence. t(0.10,140,12)c. 3,500Ā±confidence. norm(0.10,140,12)d. 4,200Ā±confidence. norm(0.10,140,12)

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