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Question 12 Incorrect Question 12 0 / 2 pts Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping

Question 12

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Incorrect Question 12 0 / 2 pts Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) shopping interval. Based on a certain article, the mean of the x distribution is about $15 and the estimated standard deviation is about $9. Let us assume that has a distribution that is approximately normal. What is the probability that x bar is between $13 and $18? Use n = 12. Round z value to two decimals and final answer to four decimals. Hint: Find P(x bar

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