Now suppose of interest is to estimate the mean number of children attending all 2017 Veterans Day celebrations. For this problem only, assume that the standard deviation of the number of children attending all 2017 Veterans Day celebrations is 21. What is the minimum number of 2017 Veterans Day celebrations that would need to be selected for the sample to allow the calculation of a 98% confidence interval with margin of error no larger than 8. 18.03 18 19 O O O O 37 37.28 38

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