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1-1 STATISTICAL REASONING ACTIVITY APPLICATION 1. HYPOTHESIS TESTING Hot fudge sundaes at a restaurant are advertised to have 6.3 ounces of ice cream and hot fudge sauce. A customer who frequently buys hot fudge sundaes at this restaurant thinks the sundaes have gotten smaller during the last month, but he is still charged the same price. He randomly selects times and days to buy and weigh 10 hot fudge sundaes. 1. In this situation, what is the population? hot fudge sundaes What is the sample? 10 hot fudge sundaes 2. Is the number 6.3 a parameter or a statistic? Explain why. because 3. What variable is the researcher measuring on each item in the sample? 4. a. Is the variable being measured quantitative or categorical? Explain why. because b. In addition, this variable is (circle one) discrete continuous because 5. The customer calculates the sample mean weight of the 10 hot fudge sundaes and obtains 6.2 ounces. Is the number 6.2 a parameter or a statistic? A because 6. If the customer were to repeat his study and randomly select another 10 hot fudge sundaes to weigh, would he get the same sample mean? Explain why or why not. 7. If the population mean really is 6.3 ounces, is an obtained sample mean of 6.2 ounces un- expected? Why or why not? Learning Through Practice: Statist