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!
1 Children under the age of 6 are not required to be in booster seats if they weigh more than 80 pounds or if they can sit with their backs against the car's seat and bend their legs over the seat edge without slouching. 2  Children under 6 may not sit in the front passenger seat.outh Carolinaâs child passenger restraint law requires that: 1  Children from birth to 1 year old, or who weigh less than 20 pounds, must be secured in a rear-facing child safety seat. 2  Children 1 through 5 years old weighing at least 20 pounds and less than 40 pounds must be restrained in a forward-facing child seat.