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. Here’s a histogram. A computer program found that the...

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. Here’s a histogram.

A computer program found that the resulting 95% confidence interval for the mean amount spent in March 2011 is (- +28,366.84, +90,691.49). Explain why the analysts didn’t find the confidence interval useful, and explain what went wrong.