A credit card company takes a random sample of 100 cardholders to see how much they charged on their card last month. A histogram and boxplot are as follows:
A computer program found that the 95% confidence interval for the mean amount spent in January 2014 is 1- + 28,366.84, + 90,691.492. Explain why the analysts didn’t find the confidence interval useful, and explain what went wrong.
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