For each of the following statements, formulate the null and alternative hypothesis. Indicate whether the appropriate test will be one tail or two tail. Finally, sketch a diagram that shows the...

For each of the following statements, formulate the null and alternative hypothesis. Indicate whether the appropriate test will be one tail or two tail. Finally, sketch a diagram that shows the appropriate location of the “rejection” region(s) for the test.

1. “The average GMAT score for MBA students is at least 750.”


2. “The average worker misses an average of three days of work every month.”


3. “The average cost of the course books is no more than $120.”