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!
Washington Stateâs Child Restraint Laws. Children under 13 years old must be buckled into the back seat as long as it is ââ¦ practical to do soâ. If a child is riding in a truck with only one row of seating, for example, then they are legally allowed to ride in the front.