1. State the hypotheses.
2. Find and the critical region.
3. Find . Also, draw a standard normal curve showing , the critical region, and .
4. State the conclusion and the interpretation.

50. Nurses' Study Time. The National Survey of Student Engagement reported that the mean number of hours spent studying per week for nursing majors is 18. Suppose a medical researcher obtained a random sample of 100 nursing majors, which yielded a sample mean study time of 19 hours. Assume hours. Test, using level of significance , whether the population mean study time for nursing majors is greater than 18 hours per week.