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.
Snare Drum. The snare drum or side drum is a ubiquitous percussion instrument known for its cylindrical shape and powerful, staccato sound. Snare drums are often used in orchestras, concert bands, marching bands, parades, drum lines, drum corps, and more. The snare is also one of the central pieces in a trap set, a collection of percussion instruments designed to be played by a seated drummer, which is used in many popular genres of music.