Question

what is the correct chest compression depth for a child?
at least one fourth the depth of the chest, or approximately 2.5 cm (1
inch)
at least one third the depth of the chest, or approximately 4 cm (1½
inches)
at least one half the depth of the chest, or approximately 7.6 cm (3
inches)
at least one third the depth of the chest, or approximately 5 cm (2
inches)

Explanation:

According to the guidelines for cardiopulmonary resuscitation (CPR), for a child (age 1 - 8 years), the correct chest - compression depth is at least one - third the depth of the chest, or approximately 4 cm (1½ inches). This is based on the anatomical and physiological characteristics of children to ensure effective blood circulation during CPR while minimizing the risk of chest wall injury.

Answer:

At least one third the depth of the chest, or approximately 4 cm (1½ inches)