Consider the following examples of two different types of statistical investigations. Example 1 Radio rating services sometimes collect data on listenership by asking participants to record the date, time, and station each time they listen to the radio.
Popular types of invisible braces include ceramic brackets, inside braces and clear aligners. Ceramic braces are just like metal braces, except that they use tooth-colored brackets (and sometimes tooth-colored wires) rather than metal to straighten teeth.
Back brace. A back brace is a device designed to limit the motion of the spine in cases of fracture or in post-operative fusions, as well as a preventative measure against some progressive conditions. Common back braces include: Rigid (Hard) braces : These braces are form-fitting plastic molds that restrict motion by as much as 50%; and.