Bootstrapping (statistics) In univariate problems, it is usually acceptable to resample the individual observations with replacement (case resampling below). In small samples, a parametric bootstrap approach might be preferred. For other problems, a smooth bootstrap will likely be preferred.
Below is a picture of a sound wave that has. been changed into alternating current by a microphone. and displayed on a CRO. If the sound is made louder and with a higher pitch, the shape of the wave changes as shown below. The amplitude has got bigger because the sound is louder. The frequency has increased. (there are more complete waves in the same time) because the sound has a higher pitch.
The pitch of a sound you hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound wave has a low pitch.For example, soprano singers stretch their vocal cords, so they vibrate more quickly as the air rushes by them, which creates higher-frequency sound waves that have a higher pitch. high frequency sound wave has a high pitch, and a low frequency sound wave has a low pitch. For example, soprano singers stretch their vocal cords, so they vibrate more quickly as the air rushes by them, which creates higher-frequency sound waves that have a higher pitch.