A Professional Basketball Player with a Poor Free Throw Percentage

Short Answer

A professional basketball player with a poor free throw percentage gets a personal coach to help him increase his percentage.He tells his coach that he has raised his proficiency from 40% to 60%.To see whether the athlete has improved,the coach asks the athlete to take ten shots.He hits 7 out of 10.If the player really can hit 60% now,and it takes at least 7 out of 10 successful shots to convince the coach,what's the power of the test?