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!
Apparently, the legal requirement is over 80 pounds/age 8. However, kids should sit in the rear seat with a seat belt on until they are at least 13 years old. Some experts say older, but no younger than 13 in the front seat. Keep in mind what is the minimal legal requirement is not necessarily the best safety practice.