Part 1: Shell Oil Company produces natural gas, gasoline, oil, and other chemical products. A manager of the credit card department for the company wanted to assess the monthly balance of credit card holders. An auditor selects a random sample of 28 accounts and finds that the mean owed is $79.00 with a standard deviation of $23.65. At the 0.10 level of significance, is there evidence to suggest that the average monthly balance is less than $84.00?

Determine the appropriate null and alternative hypothesis.

Part 2: Shell Oil Company produces natural gas,gasoline,oil,and other chemical products.A manager of the credit card department for the company wanted to assess the monthly balance of credit card holders.An auditor selects a random sample of28accounts and finds that the mean owed is$79.00with a standard deviation of$23.65.At the0.10level of significance,is there evidence to suggest that the average monthly balance is less than$84.00?

Compute the appropriate test statistic.