You measure 47 watermelons' weights, and find they have a mean weight of 43 ounces. Assume the population standard deviation is 13.1 ounces. Based on this, what is the maximal margin of error...

You measure 47 watermelons' weights, and find they have a mean weight of 43 ounces. Assume the population standard deviation is 13.1 ounces. Based on this, what is the maximal margin of error associated with a 95% confidence interval for the true population mean watermelon weight.

Give your answer as a decimal, to two places

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ounces