For Exercises 7.75 and 7.76, see page 402; for 7.77 and 7.78, see page 404; for 7.79 and 7.80, see page 406; and for 7.81 see page 408.
7.79 Power and
If you repeat the calculation in Example 7.19 for other values of that are smaller than 12, would you expect the power to increase or decrease? Explain.
7.79
Decrease, because the difference we are trying to find is smaller, it is harder to detect, so the power will be smaller.