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.
The wires on your braces help to move your teeth, and the rubber bands help to correct the alignment (say: uh-LYNE-munt), which is the way your teeth line up. If your teeth need a little extra help, you may have to wear head- or neckgear with wires attached to your teeth. If you do have to wear headgear, don't panic!