The makers of a soft drink want to identify the average age of its consumers. A sample of 55 consumers was taken. The average age in the sample was 21 years with a standard deviation of 4 years. e....

1. The makers of a soft drink want to identify the average age of its consumers. A sample of 55 consumers was taken. The average age in the sample was 21 years with a standard deviation of 4 years.

e. Suppose the company believes the average age of its consumers is 22. Use your confidence interval from part (c) to challenge that belief using a hypothesis test with significance level
^α
=05 . (State the hypotheses, test decision, and conclusion