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!
All children under the age of 13 should ride in the back seat of the vehicle. If you must put a child under the age of 13 years in the front seat, be sure the seat is all the way back and the airbag is shut off. The biggest (usually the oldest) child should always be the first choice when having to position a child in the front.