1 The level of significant difference you are hoping to show (e.g. p p value takes more study power. 2  The frequency of the outcome in the two groups. 3  Imagine an exposure that increases incidence by a third: it is easier to show a difference between 30 and 45 percent than between 10 and 15 per cent.
Name of Instrument: Bass drum. Family: Percussion. How to Play: The bass drum is played by using padded beaters or sticks and striking it against the drumhead. In a drum set, the musician plays the bass drum by using a pedal-operated stick. Types: The bass drums that are used in marching bands and military music have two drumheads.
3. After you have tuned the snare drum to a fairly high and musical pitch, tap the drum all around the head with your stick about two inches into the head from each lug. The notes you hear should be identical in pitch. Fine-tune the drum by tightening or loosening each rod accordingly. 4. Go around the kit and repeat steps 1, 2, and 3 with each tom and the bass drum. Use the snare tone as the ceiling, tuning all the other drums lower.