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A college admissions director states that the age of a typical student currently enrolled has increased from 19 years old. In a random sample of 20 students that are currently enrolled, the mean age is found to be 22.9 years. Assume the distribution of ages is normal with the standard deviation of 1.5 years. Use the significance level of 0.05. Which of the following is the appropriate Decision and Conclusion? Reject the null hypothesis. Sample data did not provide evidence to support that the average age of all students currently enrolled has increased from 19 years old. Reject the null hypothesis. Sample data provided evidence to support that the average age of all students currently enrolled has increased from 19 years old. Do not reject the null hypothesis. Sample data provided evidence to support that the average age of all students currently enrolled has increased from 19 years old. None of these Do not reject the null hypothesis. Sample data did not provide evidence to support that the average age of all students currently enrolled has increased from 19 years old.
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