Use the following information to answer questions 8 - 15: The data in the table below are the result of a random survey of 40 national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X = the number of colors on a national flag. x Freq. 1 3 2 5 3 19 4 7 5 6 Calculate the following Using a calculator, spreadsheet, or online software. n = __________

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