For any population with mean Î¼and standard deviation.  The mean, or center of the sampling distribution of, is equal to the population mean Î¼:Î¼ x = Î¼.  The standard deviation of the sampling distribution is Ï/â n, where n is the sample size: Ï x = Ï / â n.
Usually a child should be 13 or older to ride in the front seat. If the child is too small then the front airbags can be dangerous and they may still need a booster seat. When â¦ they outgrow booster seats then they should be large enough to ride on the seat with just seatbelts. Always make sure they are buckled up!
However, the National Highway Traffic Safety Administration recommends that a child be 13 years old to sit in the front seat . Whether a child sits in the front seat between the ages of 8â13, depends on the childâs height and weight, and how comfortably they will fit in the seat belt: