The average credit card debt for a recent year was $8824. Five years earlier the average credit card debt was $8159. Assume the sample sizes of 35 were used and the population standard deviations of both samples were $1396. Is there evidence to conclude that the average credit card debt has increased? Use a=0.05.
a. state the hypotheses.
b. find the critical value
c. compute the test statistic.
d. make the decision and summarize the results
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