Credit card charges. 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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80 80 I 60 60 Frequency 40 20 20 0 500,000 1,500,000 + 2,500,000 January 2014 Charges + + + + + 0 500,000 1,500,000 2,500,000 January 2014 Charges